1Q90 - JenaLib

Asymmetric Unit (Jmol Viewer)

Asym. Unit - sites (Jmol Viewer)

Biological Unit 1 (Jmol Viewer)

Biol. Unit 1 - sites (Jmol Viewer)

Biological Unit 2 (Jmol Viewer)

Title :   STRUCTURE OF THE CYTOCHROME B6F (PLASTOHYDROQUINONE : PLASTOCYANIN OXIDOREDUCTASE) FROM CHLAMYDOMONAS REINHARDTII

Authors :   D. Stroebel, Y. Choquet, J. -L. Popot, D. Picot

Date :   22 Aug 03 (Deposition) - 09 Dec 03 (Release) - 25 Jul 12 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   3.10

Chains :   Asym. Unit : A,B,C,D,G,L,M,N,R
Biol. Unit 1: A,B,C,D,G,L,M,N,R  (2x)
Biol. Unit 2: A,B,C,D,G,L,M,N,R  (4x)

Keywords :   Membrane Protein Complex, Photosynthesis, Electron Transfer, Oxydoreductase, Chlorophyll, Beta-Carotene, Stigmatellin, Sulfoquinovosyldiacylglycerol, Monogalactosyldiacylglycerol (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   D. Stroebel, Y. Choquet, J. -L. Popot, D. Picot
An Atypical Haem In The Cytochrome B6F Complex
Nature V. 426 413 2003
PubMed-ID: 14647374 | Reference-DOI: 10.1038/NATURE02155
(for further references see the PDB file header)

Molecule 1 - APOCYTOCHROME F
	Atcc	:	CHLOROPLAST GENE
	Chains	:	A
	Collection	:	CHLOROPLAST GENE
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	RESIDUES 1-292
	Gene	:	PETA
	Mutation	:	YES
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5

Molecule 2 - CYTOCHROME B6
	Atcc	:	CHLOROPLAST GENE
	Chains	:	B
	Collection	:	CHLOROPLAST GENE
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	RESIDUES 4-215
	Gene	:	PETB
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5

Molecule 3 - CYTOCHROME B6-F COMPLEX IRON-SULFUR SUBUNIT
	Atcc	:	NUCLEAR GENE
	Chains	:	C
	Collection	:	NUCLEAR GENE
	EC Number	:	1.10.99.1
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	SOLUBLE DOMAIN
	Gene	:	PETC
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5
	Synonym	:	RIESKE IRON-SULFUR PROTEIN, RISP

Molecule 4 - CYTOCHROME B6-F COMPLEX SUBUNIT 4
	Atcc	:	CHLOROPLAST GENE
	Chains	:	D
	Collection	:	CHLOROPLAST GENE
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	RESIDUES 4-159
	Gene	:	PETD
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5
	Synonym	:	17 KDA POLYPEPTIDE

Molecule 5 - CYTOCHROME B6-F COMPLEX IRON-SULFUR SUBUNIT
	Atcc	:	NUCLEAR GENE
	Chains	:	R
	Collection	:	NUCLEAR GENE
	EC Number	:	1.10.99.1
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	TRANSMEMBRANE DOMAIN
	Gene	:	PETC
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5
	Synonym	:	RIESKE IRON-SULFUR PROTEIN, RISP

Molecule 6 - CYTOCHROME B6F COMPLEX SUBUNIT PETG
	Atcc	:	CHLOROPLAST GENE
	Chains	:	G
	Collection	:	CHLOROPLAST GENE
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	RESIDUES 1-30
	Gene	:	PETG
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5
	Synonym	:	CYTOCHROME B6-F COMPLEX SUBUNIT V

Molecule 7 - CYTOCHROME B6F COMPLEX SUBUNIT PETL
	Atcc	:	CHLOROPLAST GENE
	Chains	:	L
	Collection	:	CHLOROPLAST GENE
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	RESIDUES 1-32
	Gene	:	PETL
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5
	Synonym	:	CYTOCHROME B6-F COMPLEX SUBUNIT VI

Molecule 8 - CYTOCHROME B6F COMPLEX SUBUNIT PETM
	Atcc	:	NUCLEAR GENE
	Chains	:	M
	Collection	:	NUCLEAR GENE
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	RESIDUES 62-95
	Gene	:	PETM
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5
	Synonym	:	CYTOCHROME B6-F COMPLEX SUBUNIT 7

Molecule 9 - CYTOCHROME B6F COMPLEX SUBUNIT PETN
	Atcc	:	NUCLEAR GENE
	Chains	:	N
	Collection	:	NUCLEAR GENE
	Engineered	:	YES
	Expression System	:	CHLAMYDOMONAS REINHARDTII
	Expression System Strain	:	H6F5
	Expression System Taxid	:	3055
	Fragment	:	RESIDUES 68-98
	Gene	:	PETN
	Organelle	:	CHLOROPLAST
	Organism Scientific	:	CHLAMYDOMONAS REINHARDTII
	Organism Taxid	:	3055
	Strain	:	H6F5

		1	2	3	4	5	6	7	8	9
Asymmetric Unit	:	A	B	C	D	G	L	M	N	R
Biological Unit 1 (2x)	:	A	B	C	D	G	L	M	N	R
Biological Unit 2 (4x)	:	A	B	C	D	G	L	M	N	R

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (8, 12)

No.	Name	Count	Type	Full Name
1	BCR	1	Ligand/Ion	BETA-CAROTENE
2	CLA	1	Ligand/Ion	CHLOROPHYLL A
3	FES	1	Ligand/Ion	FE2/S2 (INORGANIC) CLUSTER
4	HEM	4	Ligand/Ion	PROTOPORPHYRIN IX CONTAINING FE
5	LFA	1	Ligand/Ion	EICOSANE
6	LMG	2	Ligand/Ion	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
7	SQD	1	Ligand/Ion	1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL
8	TDS	1	Ligand/Ion	8-HYDROXY-5,7-DIMETHOXY-3-METHYL-2-TRIDECYL-4H-CHROMEN-4-ONE

Biological Unit 1 (8, 24)

No.	Name	Count	Type	Full Name
1	BCR	2	Ligand/Ion	BETA-CAROTENE
2	CLA	2	Ligand/Ion	CHLOROPHYLL A
3	FES	2	Ligand/Ion	FE2/S2 (INORGANIC) CLUSTER
4	HEM	8	Ligand/Ion	PROTOPORPHYRIN IX CONTAINING FE
5	LFA	2	Ligand/Ion	EICOSANE
6	LMG	4	Ligand/Ion	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
7	SQD	2	Ligand/Ion	1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL
8	TDS	2	Ligand/Ion	8-HYDROXY-5,7-DIMETHOXY-3-METHYL-2-TRIDECYL-4H-CHROMEN-4-ONE

Biological Unit 2 (8, 48)

No.	Name	Count	Type	Full Name
1	BCR	4	Ligand/Ion	BETA-CAROTENE
2	CLA	4	Ligand/Ion	CHLOROPHYLL A
3	FES	4	Ligand/Ion	FE2/S2 (INORGANIC) CLUSTER
4	HEM	16	Ligand/Ion	PROTOPORPHYRIN IX CONTAINING FE
5	LFA	4	Ligand/Ion	EICOSANE
6	LMG	8	Ligand/Ion	1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
7	SQD	4	Ligand/Ion	1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL
8	TDS	4	Ligand/Ion	8-HYDROXY-5,7-DIMETHOXY-3-METHYL-2-TRIDECYL-4H-CHROMEN-4-ONE

Asymmetric Unit (12, 12)

No.	Name	Evidence	Residues	Description
01	AC1	SOFTWARE	TYR A:1 , PRO A:2 , PHE A:4 , ALA A:5 , CYS A:21 , CYS A:24 , HIS A:25 , GLN A:59 , ALA A:62 , LEU A:69 , ASN A:70 , VAL A:71 , GLY A:72 , MET A:73 , ASN A:153 , GLY A:155 , ARG A:156 , GLY A:157 , VAL A:159 , TYR A:160 , PRO A:161	BINDING SITE FOR RESIDUE HEM A 900
02	AC2	SOFTWARE	VAL B:30 , TYR B:34 , CYS B:35 , GLY B:38 , PHE B:203 , ARG B:207 , GLY B:210 , ILE B:211 , HEM B:901 , HOH B:963 , ASN D:25 , PHE D:40 , ILE D:44	BINDING SITE FOR RESIDUE HEM B 903
03	AC3	SOFTWARE	TYR B:34 , GLY B:37 , GLY B:38 , THR B:40 , PHE B:41 , HIS B:100 , ARG B:103 , VAL B:104 , GLY B:109 , ARG B:114 , THR B:117 , TRP B:118 , GLY B:121 , VAL B:122 , MET B:124 , ALA B:125 , HIS B:202 , ILE B:206 , ILE B:211 , SER B:212 , HEM B:903 , HOH B:961 , HOH B:963	BINDING SITE FOR RESIDUE HEM B 901
04	AC4	SOFTWARE	GLN B:47 , GLY B:51 , PHE B:52 , MET B:54 , ARG B:83 , HIS B:86 , ARG B:87 , ALA B:90 , PHE B:131 , GLY B:135 , TYR B:136 , LEU B:138 , PRO B:139 , HIS B:187 , THR B:188 , PRO B:192	BINDING SITE FOR RESIDUE HEM B 902
05	AC5	SOFTWARE	CYS C:134 , HIS C:136 , LEU C:137 , GLY C:138 , CYS C:139 , CYS C:152 , HIS C:155 , GLY C:156 , SER C:157	BINDING SITE FOR RESIDUE FES C 210
06	AC6	SOFTWARE	TYR B:105 , ALA B:125 , SER B:130 , VAL B:133 , TYR D:80 , PHE D:81 , PRO D:83 , VAL D:104 , LEU D:132 , PHE D:133 , GLY D:136 , VAL D:139 , LMG D:953	BINDING SITE FOR RESIDUE CLA D 910
07	AC7	SOFTWARE	ILE B:32 , PHE B:33 , ILE B:39 , LEU B:99 , THR D:47 , VAL G:16 , GLY G:20 , VAL G:23 , THR M:77 , LEU M:81 , PHE N:84	BINDING SITE FOR RESIDUE BCR B 904
08	AC8	SOFTWARE	ALA B:147 , ILE B:150 , VAL B:151 , CYS C:154 , HIS C:155 , ILE D:75 , LEU D:76 , PRO D:77 , PHE D:85 , LEU D:88 , MET D:101	BINDING SITE FOR RESIDUE TDS D 920
09	AC9	SOFTWARE	LYS A:272 , PHE A:276 , TRP D:32 , ARG R:42 , ASN R:46	BINDING SITE FOR RESIDUE SQD R 950
10	BC1	SOFTWARE	ARG A:251 , LEU A:255 , LEU B:81 , GLY R:63 , TYR R:64	BINDING SITE FOR RESIDUE LFA B 960
11	BC2	SOFTWARE	GLN A:37 , ILE B:39 , CYS B:43 , MET B:92 , MET B:96 , THR D:47 , CYS D:50 , LEU D:54 , THR L:3 , ILE L:4 , TYR L:7 , PHE M:65 , THR M:69 , THR M:72 , MET M:76 , GLU N:69 , GLN N:74 , TRP N:77	BINDING SITE FOR RESIDUE LMG L 951
12	BC3	SOFTWARE	PHE B:102 , LEU D:134 , THR D:137 , ILE D:145 , THR D:148 , CLA D:910 , CYS G:7 , PRO G:15 , ILE G:18 , PHE G:22 , ALA M:63 , ILE M:66	BINDING SITE FOR RESIDUE LMG D 953

Asymmetric Unit

No.	Residues
1	C:139	-	C:154

Asymmetric Unit

No.	Residues
1	Gly A:116	-	Pro A:117
2	Arg B:112	-	Pro B:113
3	Gly C:168	-	Pro C:169
4	Trp D:32	-	Pro D:33

Asymmetric Unit (1, 1)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_PETG_CHLRE_001 *	L	30	R	PETG_CHLRE	---	---	G	L	30	R
	* ID not provided by source

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Biological Unit 1 (1, 2)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_PETG_CHLRE_001 *	L	30	R	PETG_CHLRE	---	---	G	L	30	R
	* ID not provided by source

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Biological Unit 2 (1, 4)

								dbSNP	PDB
No.	Source	Variant ID	Variant			UniProt ID	Status	ID	Chain	Variant
1	UniProt	VAR_PETG_CHLRE_001 *	L	30	R	PETG_CHLRE	---	---	G	L	30	R
	* ID not provided by source

SNP/SAP Summary Statistics (UniProtKB/Swiss-Prot)

Asymmetric Unit (3, 3)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	CYTB_NTER	PS51002	Cytochrome b/b6 N-terminal region profile.	CYB6_CHLRE	4-215	1	B:4-215
2	CYTB_CTER	PS51003	Cytochrome b/b6 C-terminal region profile.	PETD_CHLRE	17-160	1	D:17-159
3	RIESKE	PS51296	Rieske [2Fe-2S] iron-sulfur domain profile.	UCRIA_CHLRE	92-188	1	C:92-188

Biological Unit 1 (3, 6)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	CYTB_NTER	PS51002	Cytochrome b/b6 N-terminal region profile.	CYB6_CHLRE	4-215	2	B:4-215
2	CYTB_CTER	PS51003	Cytochrome b/b6 C-terminal region profile.	PETD_CHLRE	17-160	2	D:17-159
3	RIESKE	PS51296	Rieske [2Fe-2S] iron-sulfur domain profile.	UCRIA_CHLRE	92-188	2	C:92-188

Biological Unit 2 (3, 12)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	CYTB_NTER	PS51002	Cytochrome b/b6 N-terminal region profile.	CYB6_CHLRE	4-215	4	B:4-215
2	CYTB_CTER	PS51003	Cytochrome b/b6 C-terminal region profile.	PETD_CHLRE	17-160	4	D:17-159
3	RIESKE	PS51296	Rieske [2Fe-2S] iron-sulfur domain profile.	UCRIA_CHLRE	92-188	4	C:92-188

(no "Exon" information available for 1Q90)

Asymmetric Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:292
 aligned with CYF_CHLRE | P23577 from UniProtKB/Swiss-Prot  Length:317

    Alignment length:292
                                                                                                                                                                                                                                                                                                                       317      
                                    41        51        61        71        81        91       101       111       121       131       141       151       161       171       181       191       201       211       221       231       241       251       261       271       281       291       301       311     |   -  
            CYF_CHLRE    32 YPVFAQQNYANPREANGRIVCANCHLAQKAVEIEVPQAVLPDTVFEAVIELPYDKQVKQVLANGKKGDLNVGMVLILPEGFELAPPDRVPAEIKEKVGNLYYQPYSPEQKNILVVGPVPGKKYSEMVVPILSPDPAKNKNVSYLKYPIYFGGNRGRGQVYPDGKKSNNTIYNASAAGKIVAITALSEKKGGFEVSIEKANGEVVVDKIPAGPDLIVKEGQTVQADQPLTNNPNVGGFGQAETEIVLQNPARIQGLLVFFSFVLLTQVLLVLKKKQFEKVQLAEMNF------   -
               SCOP domains d1q90a1 A:1-168,A:233-247 Cytochrome f, large domain                                                                                                                    d1q90a2 A:169-232 Cytochrome f, small domain                    d1q90a1        d1q90a3 A:248-292                             SCOP domains
               CATH domains 1q90A01 A:1-170,A:231-248  [code=2.60.40.830, no name defined]                                                                                                            1q90A02 A:171-230  [code=2.40.50.100, no name defined]      1q90A01           -------------------------------------------- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------Apocytochr_F_C-1q90A01 A:167-286                                                                                        ------ Pfam domains
         Sec.struct. author hhhhhhhhh..........hhhhhh......eee...ee....eeeeeee........ee.....ee..eeeeeee.....ee.hhhhhhhhhhhhhh....ee.......eeeeeeee.....eeeeeee.............eeeeeeeeee......................eeeeeeee.......eeeeee.....eeeeee............ee.............eeeeeeeeeee.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1q90 A   1 YPVFAQQNYANPREANGRIVCANCHLAQKAVEIEVPQAVLPDTVFEAVIELPYDKQVKQVLANGKKGDLNVGMVLILPEGFELAPPDRVPAEIKEKVGNLYYQPYSPEQKNILVVGPVPGKKYSEMVVPILSPDPAKNKNVSYLKYPIYFGGNRGRGQVYPDGKKSNNTIYNASAAGKIVAITALSEKKGGFEVSIEKANGEVVVDKIPAGPDLIVKEGQTVQADQPLTNNPNVGGFGQAETEIVLQNPARIQGLLVFFSFVLLTQVLLVLKKKQFEKVQLAEMNFHHHHHH 292
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290

Chain B from PDB  Type:PROTEIN  Length:212
 aligned with CYB6_CHLRE | Q00471 from UniProtKB/Swiss-Prot  Length:215

    Alignment length:212
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213  
           CYB6_CHLRE     4 VYDWFEERLEIQAIADDITSKYVPPHVNIFYCIGGITFTCFLVQVATGFAMTFYYRPTVAEAFASVQYIMTDVNFGWLIRSIHRWSASMMVLMMVLHVFRVYLTGGFKRPRELTWVTGVIMAVCTVSFGVTGYSLPWDQVGYWAVKIVTGVPDAIPGVGGFIVELLRGGVGVGQATLTRFYSLHTFVLPLLTAVFMLMHFLMIRKQGISGPL 215
               SCOP domains d1q90b_ B: Cytochrome b6 subunit of the cytochrome b6f complex                                                                                                                                                       SCOP domains
               CATH domains 1q90B00 B:4-215 Cytochrome Bc1 Complex; Chain C                                                                                                                                                                      CATH domains
               Pfam domains ---------------------------------------------------------------------------------------Cytochrom_B_N_2-1q90B01 B:91-215                                                                                              Pfam domains
         Sec.struct. author hhhhhhhhhhhhhhhhhhhhhee.....hhhhhhhhhhhhhhhhhhhhhhhh........hhhhhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhhhhh.......hhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhhhhhhhhh.hhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE CYTB_NTER  PDB: B:4-215 UniProt: 4-215                                                                                                                                                                               PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1q90 B   4 VYDWFEERLEIQAIADDITSKYVPPHVNIFYCIGGITFTCFLVQVATGFAMTFYYRPTVAEAFASVQYIMTDVNFGWLIRSIHRWSASMMVLMMVLHVFRVYLTGGFKRPRELTWVTGVIMAVCTVSFGVTGYSLPWDQVGYWAVKIVTGVPDAIPGVGGFIVELLRGGVGVGQATLTRFYSLHTFVLPLLTAVFMLMHFLMIRKQGISGPL 215
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213

Chain C from PDB  Type:PROTEIN  Length:126
 aligned with UCRIA_CHLRE | P49728 from UniProtKB/Swiss-Prot  Length:206

    Alignment length:127
                                    89        99       109       119       129       139       149       159       169       179       189       199       
          UCRIA_CHLRE    80 QAAKDALGNDIKAGEWLKTHLAGDRSLSQGLKGDPTYLIVTADSTIEKYGLNAVCTHLGCVVPWVAAENKFKCPCHGSQYNAEGKVVRGPAPLSLALAHCDVAESGLVTFSTWTETDFRTGLEPWWA 206
               SCOP domains d1q90c_ C: ISP subunit from the cytochrome b6f complex, soluble domain                                                          SCOP domains
               CATH domains 1q90C00 C:80-206 'Rieske'-like iron-sulphur domains                                                                             CATH domains
               Pfam domains ---------------Rieske-1q90C01 C:95-183                                                                  ----------------------- Pfam domains
         Sec.struct. author ...........hhhhhhhhh....ee...hhhhh.eeee.........eeee...........ee....eee......eee....eee........eeeee...-...eeee............... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (2) ------------------------------------------------------------------------------------------------------------------------------- PROSITE (2)
                PROSITE (3) ------------RIESKE  PDB: C:92-188 UniProt: 92-188                                                            ------------------ PROSITE (3)
                 Transcript ------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1q90 C  80 QAAKDALGNDIKAGEWLKTHLAGDRSLSQGLKGDPTYLIVTADSTIEKYGLNAVCTHLGCVVPWVAAENKFKCPCHGSQYNAEGKVVRGPAPLSLALAHCDVAE-GLVTFSTWTETDFRTGLEPWWA 206
                                    89        99       109       119       129       139       149       159       169       179   | | 189       199       
                                                                                                                                 183 |                     
                                                                                                                                   185

Chain D from PDB  Type:PROTEIN  Length:156
 aligned with PETD_CHLRE | P23230 from UniProtKB/Swiss-Prot  Length:160

    Alignment length:156
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153      
           PETD_CHLRE     4 TKKPDLSDPVLKAKLAKGMGHNTYGEPAWPNDLLYMFPVVILGTFACVIGLSVLDPAAMGEPANPFATPLEILPEWYFYPVFQILRVVPNKLLGVLLMAAVPAGLITVPFIESINKFQNPYRRPIATILFLLGTLVAVWLGIGSTFPIDISLTLGL 159
               SCOP domains d1q90d_ D: Subunit IV of the cytochrome b6f complex                                                                                                          SCOP domains
               CATH domains -------1q90D01 D:11-66 Cytochrome C Oxidase, chain M           1q90D02 D:67-159 plastocyanin oxidoreductase                                                  CATH domains
               Pfam domains -------------------------------------------------------------Cytochrom_B_C-1q90D01 D:65-157                                                               -- Pfam domains
         Sec.struct. author .......hhhhhhhhhhh.hhhhh.ee.......hhhhhhhhhhhhhhhhhhhhh...................hhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhh............hhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhh.... Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                PROSITE (2) -------------CYTB_CTER  PDB: D:17-159 UniProt: 17-160                                                                                                        PROSITE (2)
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 1q90 D   4 TKKPDLSDPVLKAKLAKGMGHNTYGEPAWPNDLLYMFPVVILGTFACVIGLSVLDPAAMGEPANPFATPLEILPEWYFYPVFQILRVVPNKLLGVLLMAAVPAGLITVPFIESINKFQNPYRRPIATILFLLGTLVAVWLGIGSTFPIDISLTLGL 159
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153

Chain G from PDB  Type:PROTEIN  Length:30
 aligned with PETG_CHLRE | Q08362 from UniProtKB/Swiss-Prot  Length:37

    Alignment length:30
                                    10        20        30
           PETG_CHLRE     1 MVEPLLCGIVLGLVPVTIAGLFVTAYLQYL  30
               SCOP domains d1q90g_ G:                     SCOP domains
               CATH domains ------------------------------ CATH domains
               Pfam domains PetG-1q90G01 G:1-30            Pfam domains
         Sec.struct. author ..hhhhhhhhhhhhhhhhhhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) -----------------------------R SAPs(SNPs)
                    PROSITE ------------------------------ PROSITE
                 Transcript ------------------------------ Transcript
                 1q90 G   1 MVEPLLCGIVLGLVPVTIAGLFVTAYLQYL  30
                                    10        20        30

Chain L from PDB  Type:PROTEIN  Length:32
 aligned with PETL_CHLRE | P50369 from UniProtKB/Swiss-Prot  Length:43

    Alignment length:32
                                    21        31        41  
           PETL_CHLRE    12 MLTITSYVGLLIGALVFTLGIYLGLLKVVKLI  43
               SCOP domains d1q90l_ L:                       SCOP domains
               CATH domains -------------------------------- CATH domains
               Pfam domains PetL-1q90L01 L:1-32              Pfam domains
         Sec.struct. author hhhhhhhhhhhhhhhhhhhhhhhhhhh..... Sec.struct. author
                 SAPs(SNPs) -------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------- PROSITE
                 Transcript -------------------------------- Transcript
                 1q90 L   1 MLTITSYVGLLIGALVFTLGIYLGLLKVVKLI  32
                                    10        20        30

Chain M from PDB  Type:PROTEIN  Length:34
 aligned with PETM_CHLRE | Q42496 from UniProtKB/Swiss-Prot  Length:99

    Alignment length:34
                                    71        81        91    
           PETM_CHLRE    62 EAEFIAGTALTMVGMTLVGLAIGFVLLRVESLVE  95
               SCOP domains d1q90m_ M:                         SCOP domains
               CATH domains ---------------------------------- CATH domains
               Pfam domains PetM-1q90M01 M:62-95               Pfam domains
         Sec.struct. author hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ---------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------- PROSITE
                 Transcript ---------------------------------- Transcript
                 1q90 M  62 EAEFIAGTALTMVGMTLVGLAIGFVLLRVESLVE  95
                                    71        81        91

Chain N from PDB  Type:PROTEIN  Length:31
 aligned with PETN_CHLRE | P0C1D4 from UniProtKB/Swiss-Prot  Length:35

    Alignment length:31
                                    14        24        34 
           PETN_CHLRE     5 GEPAIVQIGWAATCVMFSFSLSLVVWGRSGL  35
               SCOP domains d1q90n_ N:                      SCOP domains
               CATH domains ------------------------------- CATH domains
               Pfam domains ------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhhhhhhhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------- PROSITE
                 Transcript ------------------------------- Transcript
                 1q90 N  68 GEPAIVQIGWAATCVMFSFSLSLVVWGRSGL  98
                                    77        87        97

Chain R from PDB  Type:PROTEIN  Length:39
 aligned with UCRIA_CHLRE | P49728 from UniProtKB/Swiss-Prot  Length:206

    Alignment length:39
                                    42        52        62         
          UCRIA_CHLRE    33 SSEVPDMNKRNIMNLILAGGAGLPITTLALGYGAFFVPP  71
               SCOP domains d1q90r_ R:                              SCOP domains
               CATH domains --------------------------------------- CATH domains
               Pfam domains -CytB6-F_Fe-S-1q90R01 R:34-71           Pfam domains
         Sec.struct. author .....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) --------------------------------------- SAPs(SNPs)
                PROSITE (2) --------------------------------------- PROSITE (2)
                PROSITE (3) --------------------------------------- PROSITE (3)
                 Transcript --------------------------------------- Transcript
                 1q90 R  33 SSEVPDMNKRNIMNLILAGGAGLPITTLALGYGAFFVPP  71
                                    42        52        62

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

Asymmetric Unit(hide GO term definitions)

Chain A (CYF_CHLRE | P23577)

molecular function
	GO:0009055	electron carrier activity	Any molecular entity that serves as an electron acceptor and electron donor in an electron transport chain. An electron transport chain is a process in which a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient.
	GO:0020037	heme binding	Interacting selectively and non-covalently with heme, any compound of iron complexed in a porphyrin (tetrapyrrole) ring.
	GO:0005506	iron ion binding	Interacting selectively and non-covalently with iron (Fe) ions.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
biological process
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0015979	photosynthesis	The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds.
cellular component
	GO:0009507	chloroplast	A chlorophyll-containing plastid with thylakoids organized into grana and frets, or stroma thylakoids, and embedded in a stroma.
	GO:0009535	chloroplast thylakoid membrane	The pigmented membrane of a chloroplast thylakoid. An example of this component is found in Arabidopsis thaliana.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0031361	integral component of thylakoid membrane	The component of the thylakoid membrane consisting of the gene products having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0009536	plastid	Any member of a family of organelles found in the cytoplasm of plants and some protists, which are membrane-bounded and contain DNA. Plant plastids develop from a common type, the proplastid.
	GO:0009579	thylakoid	A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.

Chain B (CYB6_CHLRE | Q00471)

molecular function
	GO:0009055	electron carrier activity	Any molecular entity that serves as an electron acceptor and electron donor in an electron transport chain. An electron transport chain is a process in which a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient.
	GO:0045158	electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity	Enables the directed movement of electrons within the cytochrome b6/f complex of photosystem II.
	GO:0020037	heme binding	Interacting selectively and non-covalently with heme, any compound of iron complexed in a porphyrin (tetrapyrrole) ring.
	GO:0005506	iron ion binding	Interacting selectively and non-covalently with iron (Fe) ions.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:0016491	oxidoreductase activity	Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
biological process
	GO:0022900	electron transport chain	A process in which a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient.
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0015979	photosynthesis	The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds.
	GO:0022904	respiratory electron transport chain	A process in which a series of electron carriers operate together to transfer electrons from donors such as NADH and FADH2 to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient.
cellular component
	GO:0009507	chloroplast	A chlorophyll-containing plastid with thylakoids organized into grana and frets, or stroma thylakoids, and embedded in a stroma.
	GO:0009535	chloroplast thylakoid membrane	The pigmented membrane of a chloroplast thylakoid. An example of this component is found in Arabidopsis thaliana.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0009536	plastid	Any member of a family of organelles found in the cytoplasm of plants and some protists, which are membrane-bounded and contain DNA. Plant plastids develop from a common type, the proplastid.
	GO:0009579	thylakoid	A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.

Chain C,R (UCRIA_CHLRE | P49728)

molecular function
	GO:0051537	2 iron, 2 sulfur cluster binding	Interacting selectively and non-covalently with a 2 iron, 2 sulfur (2Fe-2S) cluster; this cluster consists of two iron atoms, with two inorganic sulfur atoms found between the irons and acting as bridging ligands.
	GO:0051536	iron-sulfur cluster binding	Interacting selectively and non-covalently with an iron-sulfur cluster, a combination of iron and sulfur atoms.
	GO:0046872	metal ion binding	Interacting selectively and non-covalently with any metal ion.
	GO:0016491	oxidoreductase activity	Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
	GO:0016679	oxidoreductase activity, acting on diphenols and related substances as donors	Catalysis of an oxidation-reduction (redox) reaction in which a diphenol or related substance acts as a hydrogen or electron donor and reduces a hydrogen or electron acceptor.
	GO:0009496	plastoquinol--plastocyanin reductase activity	Catalysis of the reaction: 2 H(+)[side 1] + 2 oxidized plastocyanin + plastoquinol-1 = 2 H(+)[side 2] + 2 reduced plastocyanin + plastoquinone. This reaction involves the concomitant transfer of 2 H+ ions across a membrane.
biological process
	GO:0010196	nonphotochemical quenching	The process by which excess light energy absorbed by chlorophyll and not used to drive photosynthesis is emitted as heat. This process helps maintain the balance between dissipation and utilization of light energy to minimize generation of oxidizing molecules, thereby protecting the plant against photo-oxidative damage.
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
cellular component
	GO:0009507	chloroplast	A chlorophyll-containing plastid with thylakoids organized into grana and frets, or stroma thylakoids, and embedded in a stroma.
	GO:0009941	chloroplast envelope	The double lipid bilayer enclosing the chloroplast and separating its contents from the rest of the cytoplasm; includes the intermembrane space.
	GO:0009534	chloroplast thylakoid	Sac-like membranous structures (cisternae) in a chloroplast combined into stacks (grana) and present singly in the stroma (stroma thylakoids or frets) as interconnections between grana. An example of this component is found in Arabidopsis thaliana.
	GO:0009535	chloroplast thylakoid membrane	The pigmented membrane of a chloroplast thylakoid. An example of this component is found in Arabidopsis thaliana.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0005886	plasma membrane	The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
	GO:0009536	plastid	Any member of a family of organelles found in the cytoplasm of plants and some protists, which are membrane-bounded and contain DNA. Plant plastids develop from a common type, the proplastid.
	GO:0009579	thylakoid	A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.
	GO:0042651	thylakoid membrane	The pigmented membrane of any thylakoid.

Chain D (PETD_CHLRE | P23230)

molecular function
	GO:0009055	electron carrier activity	Any molecular entity that serves as an electron acceptor and electron donor in an electron transport chain. An electron transport chain is a process in which a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient.
	GO:0045158	electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity	Enables the directed movement of electrons within the cytochrome b6/f complex of photosystem II.
	GO:0045156	electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity	Enables the directed movement of electrons within the cyclic electron transport pathway of photosynthesis.
	GO:0016491	oxidoreductase activity	Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
biological process
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0015979	photosynthesis	The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds.
	GO:0009767	photosynthetic electron transport chain	A process, occurring as part of photosynthesis, in which light provides the energy for a series of electron carriers to operate together to transfer electrons and generate a transmembrane electrochemical gradient.
cellular component
	GO:0009507	chloroplast	A chlorophyll-containing plastid with thylakoids organized into grana and frets, or stroma thylakoids, and embedded in a stroma.
	GO:0009535	chloroplast thylakoid membrane	The pigmented membrane of a chloroplast thylakoid. An example of this component is found in Arabidopsis thaliana.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0009536	plastid	Any member of a family of organelles found in the cytoplasm of plants and some protists, which are membrane-bounded and contain DNA. Plant plastids develop from a common type, the proplastid.
	GO:0009579	thylakoid	A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.
	GO:0042651	thylakoid membrane	The pigmented membrane of any thylakoid.

Chain G (PETG_CHLRE | Q08362)

molecular function
	GO:0045158	electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity	Enables the directed movement of electrons within the cytochrome b6/f complex of photosystem II.
biological process
	GO:0017004	cytochrome complex assembly	The aggregation, arrangement and bonding together of a cytochrome complex. A cytochrome complex is a protein complex in which at least one of the proteins is a cytochrome, i.e. a heme-containing protein involved in catalysis of redox reactions.
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0015979	photosynthesis	The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds.
cellular component
	GO:0009507	chloroplast	A chlorophyll-containing plastid with thylakoids organized into grana and frets, or stroma thylakoids, and embedded in a stroma.
	GO:0009535	chloroplast thylakoid membrane	The pigmented membrane of a chloroplast thylakoid. An example of this component is found in Arabidopsis thaliana.
	GO:0009512	cytochrome b6f complex	Complex that transfers electrons from reduced plastoquinone to oxidized plastocyanin and translocates protons from the stroma to the lumen. The complex contains a core structure of three catalytic subunits: cytochrome b, the Rieske iron sulfur protein (ISP), and cytochrome f, which are arranged in an integral membrane-bound dimeric complex; additional subunits are present, and vary among different species.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0009536	plastid	Any member of a family of organelles found in the cytoplasm of plants and some protists, which are membrane-bounded and contain DNA. Plant plastids develop from a common type, the proplastid.
	GO:0009579	thylakoid	A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.

Chain L (PETL_CHLRE | P50369)

molecular function
	GO:0009055	electron carrier activity	Any molecular entity that serves as an electron acceptor and electron donor in an electron transport chain. An electron transport chain is a process in which a series of electron carriers operate together to transfer electrons from donors to any of several different terminal electron acceptors to generate a transmembrane electrochemical gradient.
	GO:0045158	electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity	Enables the directed movement of electrons within the cytochrome b6/f complex of photosystem II.
biological process
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0015979	photosynthesis	The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds.
cellular component
	GO:0009507	chloroplast	A chlorophyll-containing plastid with thylakoids organized into grana and frets, or stroma thylakoids, and embedded in a stroma.
	GO:0009535	chloroplast thylakoid membrane	The pigmented membrane of a chloroplast thylakoid. An example of this component is found in Arabidopsis thaliana.
	GO:0009512	cytochrome b6f complex	Complex that transfers electrons from reduced plastoquinone to oxidized plastocyanin and translocates protons from the stroma to the lumen. The complex contains a core structure of three catalytic subunits: cytochrome b, the Rieske iron sulfur protein (ISP), and cytochrome f, which are arranged in an integral membrane-bound dimeric complex; additional subunits are present, and vary among different species.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0009536	plastid	Any member of a family of organelles found in the cytoplasm of plants and some protists, which are membrane-bounded and contain DNA. Plant plastids develop from a common type, the proplastid.
	GO:0009579	thylakoid	A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.

Chain M (PETM_CHLRE | Q42496)

biological process
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
cellular component
	GO:0009507	chloroplast	A chlorophyll-containing plastid with thylakoids organized into grana and frets, or stroma thylakoids, and embedded in a stroma.
	GO:0009535	chloroplast thylakoid membrane	The pigmented membrane of a chloroplast thylakoid. An example of this component is found in Arabidopsis thaliana.
	GO:0009512	cytochrome b6f complex	Complex that transfers electrons from reduced plastoquinone to oxidized plastocyanin and translocates protons from the stroma to the lumen. The complex contains a core structure of three catalytic subunits: cytochrome b, the Rieske iron sulfur protein (ISP), and cytochrome f, which are arranged in an integral membrane-bound dimeric complex; additional subunits are present, and vary among different species.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0009536	plastid	Any member of a family of organelles found in the cytoplasm of plants and some protists, which are membrane-bounded and contain DNA. Plant plastids develop from a common type, the proplastid.
	GO:0070469	respiratory chain	The protein complexes that form the electron transport system (the respiratory chain), associated with a cell membrane, usually the plasma membrane (in prokaryotes) or the inner mitochondrial membrane (on eukaryotes). The respiratory chain complexes transfer electrons from an electron donor to an electron acceptor and are associated with a proton pump to create a transmembrane electrochemical gradient.
	GO:0009579	thylakoid	A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.

Chain N (PETN_CHLRE | P0C1D4)

molecular function
	GO:0045158	electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity	Enables the directed movement of electrons within the cytochrome b6/f complex of photosystem II.
biological process
	GO:0017004	cytochrome complex assembly	The aggregation, arrangement and bonding together of a cytochrome complex. A cytochrome complex is a protein complex in which at least one of the proteins is a cytochrome, i.e. a heme-containing protein involved in catalysis of redox reactions.
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0015979	photosynthesis	The synthesis by organisms of organic chemical compounds, especially carbohydrates, from carbon dioxide (CO2) using energy obtained from light rather than from the oxidation of chemical compounds.
cellular component
	GO:0009507	chloroplast	A chlorophyll-containing plastid with thylakoids organized into grana and frets, or stroma thylakoids, and embedded in a stroma.
	GO:0009535	chloroplast thylakoid membrane	The pigmented membrane of a chloroplast thylakoid. An example of this component is found in Arabidopsis thaliana.
	GO:0009512	cytochrome b6f complex	Complex that transfers electrons from reduced plastoquinone to oxidized plastocyanin and translocates protons from the stroma to the lumen. The complex contains a core structure of three catalytic subunits: cytochrome b, the Rieske iron sulfur protein (ISP), and cytochrome f, which are arranged in an integral membrane-bound dimeric complex; additional subunits are present, and vary among different species.
	GO:0016021	integral component of membrane	The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
	GO:0016020	membrane	A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
	GO:0009536	plastid	Any member of a family of organelles found in the cytoplasm of plants and some protists, which are membrane-bounded and contain DNA. Plant plastids develop from a common type, the proplastid.
	GO:0009579	thylakoid	A membranous cellular structure that bears the photosynthetic pigments in plants, algae, and cyanobacteria. In cyanobacteria thylakoids are of various shapes and are attached to, or continuous with, the plasma membrane. In eukaryotes they are flattened, membrane-bounded disk-like structures located in the chloroplasts; in the chloroplasts of higher plants the thylakoids form dense stacks called grana. Isolated thylakoid preparations can carry out photosynthetic electron transport and the associated phosphorylation.

Asymmetric Unit
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		BC1	[ RasMol ]	+environment [ RasMol ]
		BC2	[ RasMol ]	+environment [ RasMol ]
		BC3	[ RasMol ]	+environment [ RasMol ]

	Cis Peptide Bonds
		Arg B:112 - Pro B:113	[ RasMol ]
		Gly A:116 - Pro A:117	[ RasMol ]
		Gly C:168 - Pro C:169	[ RasMol ]
		Trp D:32 - Pro D:33	[ RasMol ]

Biological Units
	Complete Structure
		Biological Unit 1	[ Jena3D ]
		Biological Unit 2	[ Jena3D ]

Jmol
	protein: cartoon or spacefill or dots and stick; nucleic acid: cartoon and stick; ligands: spacefill; active site: stick [ Asym. Unit PNG format \| Asym. Unit - sites PNG format \| Biol. Unit 1 PNG format \| Biol. Unit 1 - sites PNG format \| Biol. Unit 2 PNG format ](automatic orientation, automatically generated)
Molscript
	protein, nucleic acid: cartoon; ligands: spacefill; active site: ball and stick [ mono PDF format \| stereo PDF format ](default orientation, automatically generated)

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	1q90
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	CYB6_CHLRE \| Q00471
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	CYF_CHLRE \| P23577
		Comparative Protein Structure Models	:	ModBase
		Genomic Information	:	Ensembl
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	PETD_CHLRE \| P23230
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	PETG_CHLRE \| Q08362
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		Genomic Information	:	Ensembl
		Protein-protein Interaction	:	DIP
		Sequence, Family and Domain Information	:	InterPro \| Pfam \| SMART \| UniProtKB/SwissProt
	PETL_CHLRE \| P50369
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		Genomic Information	:	Ensembl
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		Sequence, Family and Domain Information	:	InterPro \| Pfam \| SMART \| UniProtKB/SwissProt
	PETM_CHLRE \| Q42496
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		Genomic Information	:	Ensembl
		Protein-protein Interaction	:	DIP
		Sequence, Family and Domain Information	:	InterPro \| Pfam \| SMART \| UniProtKB/SwissProt
	PETN_CHLRE \| P0C1D4
		Comparative Protein Structure Models	:	ModBase
		Genomic Information	:	Ensembl
		Protein-protein Interaction	:	DIP
		Sequence, Family and Domain Information	:	InterPro \| Pfam \| SMART \| UniProtKB/SwissProt
	UCRIA_CHLRE \| P49728
		Comparative Protein Structure Models	:	ModBase
		Genomic Information	:	Ensembl
		Protein-protein Interaction	:	DIP
		Sequence, Family and Domain Information	:	InterPro \| Pfam \| SMART \| UniProtKB/SwissProt

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	1.10.99.1
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Access by UniProt ID/Accession number
	CYB6_CHLRE \| Q00471
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)
	CYF_CHLRE \| P23577
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)
	PETD_CHLRE \| P23230
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)
	PETG_CHLRE \| Q08362
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)
	PETL_CHLRE \| P50369
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)
	PETM_CHLRE \| Q42496
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	PETN_CHLRE \| P0C1D4
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	UCRIA_CHLRE \| P49728
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UniProtKB/Swiss-Prot
	CYF_CHLRE \| P23577	:	1cfm 1e2v 1e2w 1e2z 1ewh

(no "Related Entries Specified in the PDB File" available for 1Q90)

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (8, 12)

Sites (12, 12)

SS Bonds (1, 1)

Cis Peptide Bonds (4, 4)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (1, 1)

PROSITE Motifs (3, 3)

Exons (0, 0)

Sequences/Alignments

Classification and Annotation

SCOP Domains (11, 11)

CATH Domains (6, 6)

Pfam Domains (8, 8)

Gene Ontology (31, 103)

Visualization

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Still Images

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Databases

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Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

Related Entries Specified in the PDB File