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(-) Description

Title :  AVIAN RESPIRATORY COMPLEX II WITH OXALOACETATE AND UBIQUINONE
 
Authors :  L. Huang, D. Cobessi, E. Y. Tung, E. A. Berry
Date :  01 Feb 05  (Deposition) - 20 Dec 05  (Release) - 17 Feb 16  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.20
Chains :  Asym./Biol. Unit :  A,B,C,D
Keywords :  Complex Ii, Membrane Protein, Heme Protein, Iron Sulfur Protein, Cytochrome B, Oxidoreductase, Redox Enzyme, Respiratory Chain, Oxaloacetate Ubiquinone (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  L. Huang, G. Sun, D. Cobessi, A. C. Wang, J. T. Shen, E. Y. Tung, V. E. Anderson, E. A. Berry
3-Nitropropionic Acid Is A Suicide Inhibitor Of Mitochondrial Respiration That, Upon Oxidation By Complex Ii, Forms A Covalent Adduct With A Catalytic Base Arginine In The Active Site Of The Enzyme
J. Biol. Chem. V. 281 5965 2006
PubMed-ID: 16371358  |  Reference-DOI: 10.1074/JBC.M511270200
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - SUCCINATE DEHYDROGENASE FLAVOPROTEIN SUBUNIT
    ChainsA
    EC Number1.3.5.1
    Organism CommonCHICKEN
    Organism ScientificGALLUS GALLUS
    Organism Taxid9031
    SynonymFP, FLAVOPROTEIN SUBUNIT OF COMPLEX II
 
Molecule 2 - SUCCINATE DEHYDROGENASE IP SUBUNIT
    ChainsB
    EC Number1.3.5.1
    Organism CommonCHICKEN
    Organism ScientificGALLUS GALLUS
    Organism Taxid9031
 
Molecule 3 - SUCCINATE DEHYDROGENASE CYTOCHROME B, LARGE SUBUNIT
    ChainsC
    EC Number1.3.5.1
    Organism CommonCHICKEN
    Organism ScientificGALLUS GALLUS
    Organism Taxid9031
 
Molecule 4 - SUCCINATE DEHYDROGENASE CYTOCHROME B, SMALL SUBUNIT
    ChainsD
    EC Number1.3.5.1
    Organism CommonCHICKEN
    Organism ScientificGALLUS GALLUS
    Organism Taxid9031

 Structural Features

(-) Chains, Units

  1234
Asymmetric/Biological Unit ABCD

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (11, 41)

Asymmetric/Biological Unit (11, 41)
No.NameCountTypeFull Name
1F3S1Ligand/IonFE3-S4 CLUSTER
2FAD1Ligand/IonFLAVIN-ADENINE DINUCLEOTIDE
3FES1Ligand/IonFE2/S2 (INORGANIC) CLUSTER
4GOL1Ligand/IonGLYCEROL
5HEM1Ligand/IonPROTOPORPHYRIN IX CONTAINING FE
6JZR1Ligand/IonHEXYL BETA-D-GLUCOPYRANOSIDE
7PEE2Ligand/Ion1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE
8SF41Ligand/IonIRON/SULFUR CLUSTER
9TEO1Ligand/IonMALATE LIKE INTERMEDIATE
10UNL30Ligand/IonUNKNOWN LIGAND
11UQ1Ligand/IonCOENZYME Q10, (2Z,6E,10Z,14E,18E,22E,26Z)-ISOMER

(-) Sites  (11, 11)

Asymmetric Unit (11, 11)
No.NameEvidenceResiduesDescription
01AC1SOFTWARELYS C:31 , TRP C:32 , SER C:33 , LEU C:34 , PRO C:35 , GLU C:120 , HOH C:1519 , TYR D:88 , TYR D:89BINDING SITE FOR RESIDUE JZR C 142
02AC2SOFTWAREVAL A:24 , GLY A:25 , ALA A:26 , GLY A:27 , GLY A:28 , ALA A:29 , VAL A:47 , THR A:48 , LYS A:49 , LEU A:50 , SER A:55 , HIS A:56 , THR A:57 , ALA A:59 , ALA A:60 , GLN A:61 , GLY A:62 , GLY A:63 , TYR A:176 , PHE A:177 , ALA A:178 , ALA A:212 , THR A:213 , THR A:224 , ASP A:232 , LEU A:263 , HIS A:364 , TYR A:365 , GLY A:396 , GLU A:397 , ARG A:408 , ALA A:411 , ASN A:412 , SER A:413 , LEU A:414 , LEU A:417 , TEO A:1002 , HOH A:1023 , HOH A:1035 , HOH A:1049 , HOH A:1052 , HOH A:1135BINDING SITE FOR RESIDUE FAD A 1001
03AC3SOFTWARESER B:64 , CYS B:65 , ARG B:66 , GLY B:68 , CYS B:70 , GLY B:71 , CYS B:73 , CYS B:85BINDING SITE FOR RESIDUE FES B 1002
04AC4SOFTWARECYS B:158 , ILE B:159 , CYS B:161 , ALA B:162 , CYS B:164 , MET B:185 , CYS B:225 , PRO B:226BINDING SITE FOR RESIDUE SF4 B 1003
05AC5SOFTWARECYS B:168 , TYR B:178 , CYS B:215 , HIS B:216 , THR B:217 , ILE B:218 , MET B:219 , ASN B:220 , CYS B:221BINDING SITE FOR RESIDUE F3S B 1004
06AC6SOFTWAREHIS B:216 , HIS C:42 , ARG C:43 , GLY C:46 , VAL C:47 , LEU C:49 , SER C:50 , HIS C:98 , HIS C:105 , HOH C:1002 , HOH C:1217 , HOH C:1243 , HOH C:1376 , HOH C:1504 , LEU D:43 , HIS D:46 , GLY D:50BINDING SITE FOR RESIDUE HEM C 143
07AC7SOFTWAREGLY A:62 , HIS A:253 , LEU A:263 , THR A:265 , GLU A:266 , ARG A:297 , HIS A:364 , ARG A:408 , GLY A:410 , ALA A:411 , FAD A:1001BINDING SITE FOR RESIDUE TEO A 1002
08AC8SOFTWAREPRO B:169 , TRP B:173 , ILE B:218 , HOH B:1043 , HOH B:1077 , ILE C:27 , MET C:36 , SER C:39 , ILE C:40 , ARG C:43 , TYR D:58BINDING SITE FOR RESIDUE UQ B 1005
09AC9SOFTWAREVAL C:92 , LEU D:24 , ALA D:27 , VAL D:97 , TRP D:101BINDING SITE FOR RESIDUE PEE D 104
10BC1SOFTWARELEU C:95 , TRP C:100 , ALA D:18 , LEU D:24BINDING SITE FOR RESIDUE PEE C 144
11BC2SOFTWAREILE B:11 , LYS B:13 , HOH B:1197 , HOH B:1211BINDING SITE FOR RESIDUE GOL B 1012

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 1YQ3)

(-) Cis Peptide Bonds  (1, 1)

Asymmetric/Biological Unit
No.Residues
1Ala A:401 -Ser A:402

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1YQ3)

(-) PROSITE Motifs  (5, 5)

Asymmetric/Biological Unit (5, 5)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
12FE2S_FER_2PS51085 2Fe-2S ferredoxin-type iron-sulfur binding domain profile.SDHB_CHICK50-143  1B:12-105
2FRD_SDH_FAD_BINDINGPS00504 Fumarate reductase / succinate dehydrogenase FAD-binding site.SDHA_CHICK98-107  1A:54-63
32FE2S_FER_1PS00197 2Fe-2S ferredoxin-type iron-sulfur binding region signature.SDHB_CHICK103-111  1B:65-73
44FE4S_FER_2PS51379 4Fe-4S ferredoxin-type iron-sulfur binding domain profile.SDHB_CHICK186-216  1B:148-178
54FE4S_FER_1PS00198 4Fe-4S ferredoxin-type iron-sulfur binding region signature.SDHB_CHICK196-207  1B:158-169

(-) Exons   (0, 0)

(no "Exon" information available for 1YQ3)

(-) Sequences/Alignments

Asymmetric/Biological 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:614
 aligned with SDHA_CHICK | Q9YHT1 from UniProtKB/Swiss-Prot  Length:665

    Alignment length:614
                                    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       321       331       341       351       361       371       381       391       401       411       421       431       441       451       461       471       481       491       501       511       521       531       541       551       561       571       581       591       601       611       621       631       641       651       661    
           SDHA_CHICK    52 ISTQYPVVDHEFDAVVVGAGGAGLRAAFGLSEAGFNTACVTKLFPTRSHTVAAQGGINAALGNMEDDNWRWHFYDTVKGSDWLGDQDAIHYMTEQAPAAVIELENYGMPFSRTEEGKIYQRAFGGQSLQFGKGGQAHRCCCVADRTGHSLLHTLYGRSLRYDTSYFVEYFALDLLMENGECRGVIALCIEDGTIHRFRAKNTVIATGGYGRTYFSCTSAHTSTGDGTAMVTRAGLPCQDLEFVQFHPTGIYGAGCLITEGCRGEGGILINSQGERFMERYAPVAKDLASRDVVSRSMTIEIREGRGCGPEKDHVYLQLHHLPPQQLATRLPGISETAMIFAGVDVTKEPIPVLPTVHYNMGGIPTNYKGQVITHVNGEDKVVPGLYACGEAASASVHGANRLGANSLLDLVVFGRACALTIAETCKPGEPVPSIKPNAGEESVANLDKLRFADGTIRTSEARLNMQKTMQSHAAVFRTGSILQEGCEKLSQIYCDLAHLKTFDRGIVWNTDLVETLELQNLMLCALQTIYGAEARKESRGAHAREDYKFRIDDFDYSKPLQGQQKRPFEEHWRKHTLSYVDVKSGKVTLKYRPVIDRTLNEEDCSSVPPAIRSY 665
               SCOP domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 1yq3A01 A:8-256,A:361-439  [code=3.50.50.60, no name defined]                                                                                                                                                                                            1yq3A02 A:257-360 Flavocytochrome C3; Chain A, domain 1                                                 1yq3A01 A:8-256,A:361-439  [code=3.50.50.60, no name defined]                  1yq3A03 A:440-556  [code=1.20.58.100, no name defined]                                                               1yq3A04 A:557-621 succinate dehydrogenase protein domain          CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ......eeeeeeeeeee..hhhhhhhhhhhhhh...eeeee..hhhhhhhhhh...ee.........hhhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhhhhh.............ee......hhhhh......ee....hhhhhhhhhhhhhhh....eeee.eeeeeeeee..eeeeeeeee.....eeeeeeeeeee....hhhhh..........hhhhhhhhhh...ee....eeeeeeee........hhhhhh..eee......hhhhhh..hhhhhhhhhhhhhhhhhhhh..........eeee....hhhhhhhhhhhhhhhhhhhhh.......eeeeeeeeee...ee.....eeeeee..eeeeeeeeee....ee...........hhhhhhhhhhhhhhhhhhhhh.............hhhhhhhhhhhhh....eehhhhhhhhhhhhhhhh..eehhhhhhhhhhhhhhhhhhh..ee........hhhhhhhhhhhhhhhhhhhhhhhhhhh.......ee......................hhhhh..eeeeeeee....eeeeeeee..................... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (2) ----------------------------------------------FRD_SDH_FA------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE (2)
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1yq3 A   8 ISTQYPVVDHEFDAVVVGAGGAGLRAAFGLSEAGFNTACVTKLFPTRSHTVAAQGGINAALGNMEDDNWRWHFYDTVKGSDWLGDQDAIHYMTEQAPAAVIELENYGMPFSRTEEGKIYQRAFGGQSLQFGKGGQAHRCCCVADRTGHSLLHTLYGRSLRYDTSYFVEYFALDLLMENGECRGVIALCIEDGTIHRFRAKNTVIATGGYGRTYFSCTSAHTSTGDGTAMVTRAGLPCQDLEFVQFHPTGIYGAGCLITEGCRGEGGILINSQGERFMERYAPVAKDLASRDVVSRSMTIEIREGRGCGPEKDHVYLQLHHLPPQQLATRLPGISETAMIFAGVDVTKEPIPVLPTVHYNMGGIPTNYKGQVITHVNGEDKVVPGLYACGEAASASVHGANRLGANSLLDLVVFGRACALTIAETCKPGEPVPSIKPNAGEESVANLDKLRFADGTIRTSEARLNMQKTMQSHAAVFRTGSILQEGCEKLSQIYRDLAHLKTFDRGIVWNTDLVETLELQNLMLCALQTIYGAEARKESRGAHAREDYKLRIDEFDYSKPLQGQQKRPFEEHWRKHTLSYVDVKSGKVTLKYRPVIDRTLNEEDCSSVPPAIRSY 621
                                    17        27        37        47        57        67        77        87        97       107       117       127       137       147       157       167       177       187       197       207       217       227       237       247       257       267       277       287       297       307       317       327       337       347       357       367       377       387       397       407       417       427       437       447       457       467       477       487       497       507       517       527       537       547       557       567       577       587       597       607       617    

Chain B from PDB  Type:PROTEIN  Length:242
 aligned with SDHB_CHICK | Q9YHT2 from UniProtKB/Swiss-Prot  Length:290

    Alignment length:242
                                    53        63        73        83        93       103       113       123       133       143       153       163       173       183       193       203       213       223       233       243       253       263       273       283  
           SDHB_CHICK    44 AATSRIKKFSIYRWDPDKPGDKPRMQTYEVDLNKCGPMVLDALIKIKNELDSTLTFRRSCREGICGSCAMNIAGGNTLACTKKIDPDLSKTTKIYPLPHMYVVKDLVPDLSNFYAQYKSIEPYLKKKDESKQGKEQYLQSIEDRQKLDGLYECILCACCSTSCPSYWWNGDKYLGPAVLMQAYRWMIDSRDDYTEERLAQLQDPFSLYRCHTIMNCTRTCPKGLNPGKAIAEIKKMMATYKE 285
               SCOP domains d1yq3b1 B:6-114 Succinate dehydogenase iron-sulfur protein, N-terminal domain                                d1yq3b2 B:115-247 Succinate dehydogenase                                                                                              SCOP domains
               CATH domains 1yq3B01 B:6-114  [code=3.10.20.30, no name defined]                                                          1yq3B02 B:115-247 Fumarate Reductase Iron-sulfur Protein; Chain B, domain 2                                                           CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....eeeeeeee..........eeeeeeee.hhh..hhhhhhhhhhhhh..................eeee..eeee.hhh........eeeee......eee..ee.hhhhhhhhhhh...................hhhhhhh............hhhhhhhhhhhh....hhhhhhhhhhhhh.....hhhhhhhh.............hhhhhhh....hhhhhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ------2FE2S_FER_2  PDB: B:12-105 UniProt: 50-143                                                    ------------------------------------------4FE4S_FER_2  PDB: B:148-178    --------------------------------------------------------------------- PROSITE (1)
                PROSITE (2) --------------------------------------------------------------------------------------------------------------------------------------------------------4FE4S_FER_1 ------------------------------------------------------------------------------ PROSITE (2)
                PROSITE (3) -----------------------------------------------------------2FE2S_FER------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE (3)
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1yq3 B   6 AATSRIKKFSIYRWDPDKPGDKPRMQTYEVDLNKCGPMVLDALIKIKNELDSTLTFRRSCREGICGSCAMNIAGGNTLACTKKIDPDLSKTTKIYPLPHMYVVKDLVPDLSNFYAQYKSIEPYLKKKDESKQGKEQYLQSIEDRQKLDGLYECILCACCSTSCPSYWWNGDKYLGPAVLMQAYRWMIDSRDDYTEERLAQLQDPFSLYRCHTIMNCTRTCPKGLNPGKAIAEIKKMMATYKE 247
                                    15        25        35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245  

Chain C from PDB  Type:PROTEIN  Length:140
 aligned with D0VWW3_CHICK | D0VWW3 from UniProtKB/TrEMBL  Length:140

    Alignment length:140
                                                                                                                                                                    140 
                                    11        21        31        41        51        61        71        81        91       101       111       121       131        |-
         D0VWW3_CHICK     2 ATTAKEEMARFWEKNTKSSRPLSPHISIYKWSLPMAMSITHRGTGVALSLGVSLFSLAALLLPEQFPHYVAVVKSLSLSPALIYSAKFALVFPLSYHTWNGIRHLVWDMGKGFKLSQVEQSGVVVLILTLLSSAAIASE-   -
               SCOP domains d1yq3c_ C: automated matches                                                                                                                 SCOP domains
               CATH domains 1yq3C01 C:2-32 Single helix bin1yq3C02 C:33-141 Fumarate reductase respiratory complex transmembrane subunits                                CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..hhhhhhhhhhhhhhh..............hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhhhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....hhhhhhhhhhhhhhhhhhhhhhhh... Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1yq3 C   2 ATTAKEEMARFWEKNTKSSRPLSPHISIYKWSLPMAMSITHRGTGVALSLGVSLFSLAALLLPEQFPHYVAVVKSLSLSPALIYSAKFALVFPLSYHTWNGIRHLVWDMGKGFKLSQVEQSGVVVLILTLLSSAGIAAIS 141
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141

Chain D from PDB  Type:PROTEIN  Length:102
 aligned with DHSD_CHICK | Q5ZIS0 from UniProtKB/Swiss-Prot  Length:157

    Alignment length:102
                                    65        75        85        95       105       115       125       135       145       155  
           DHSD_CHICK    56 SSKAASLHWTSERAVSALLLGLLPAAYLYPGPAVDYSLAAALTLHGHWGLGQVITDYVHGDTPIKVANTGLYVLSAITFTGLCYFNYYDVGICKAVAMLWSI 157
               SCOP domains d1yq3d_ D: automated matches                                                                           SCOP domains
               CATH domains 1yq3D00 D:2-103 Fumarate reductase respiratory complex transmembrane subunits                          CATH domains
               Pfam domains CybS-1yq3D01 D:2-102                                                                                 - Pfam domains
         Sec.struct. author ..hhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.hhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------ Transcript
                 1yq3 D   2 SSKAASLHWTSERAVSALLLGLLPAAYLYPGPAVDYSLAAALTLHGHWGLGQVITDYVHGDTPIKVANTGLYVLSAITFTGLCYFNYYDVGICKAVAMLWSI 103
                                    11        21        31        41        51        61        71        81        91       101  

   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 '|'

 Classification and Annotation

(-) SCOP Domains  (3, 4)

Asymmetric/Biological Unit

(-) CATH Domains  (8, 9)

Asymmetric/Biological Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (1, 1)

Asymmetric/Biological Unit

(-) Gene Ontology  (25, 51)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (SDHA_CHICK | Q9YHT1)
molecular function
    GO:0050660    flavin adenine dinucleotide binding    Interacting selectively and non-covalently with FAD, flavin-adenine dinucleotide, the coenzyme or the prosthetic group of various flavoprotein oxidoreductase enzymes, in either the oxidized form, FAD, or the reduced form, FADH2.
    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:0016627    oxidoreductase activity, acting on the CH-CH group of donors    Catalysis of an oxidation-reduction (redox) reaction in which a CH-CH group acts as a hydrogen or electron donor and reduces a hydrogen or electron acceptor.
    GO:0008177    succinate dehydrogenase (ubiquinone) activity    Catalysis of the reaction: succinate + ubiquinone = fumarate + ubiquinol.
    GO:0000104    succinate dehydrogenase activity    Catalysis of the reaction: succinate + acceptor = fumarate + reduced acceptor.
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: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.
    GO:0006105    succinate metabolic process    The chemical reactions and pathways involving succinate, also known as butanedioate or ethane dicarboxylate, the dianion of succinic acid. Succinate is an important intermediate in metabolism and a component of the TCA cycle.
    GO:0006099    tricarboxylic acid cycle    A nearly universal metabolic pathway in which the acetyl group of acetyl coenzyme A is effectively oxidized to two CO2 and four pairs of electrons are transferred to coenzymes. The acetyl group combines with oxaloacetate to form citrate, which undergoes successive transformations to isocitrate, 2-oxoglutarate, succinyl-CoA, succinate, fumarate, malate, and oxaloacetate again, thus completing the cycle. In eukaryotes the tricarboxylic acid is confined to the mitochondria. See also glyoxylate cycle.
cellular component
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005743    mitochondrial inner membrane    The inner, i.e. lumen-facing, lipid bilayer of the mitochondrial envelope. It is highly folded to form cristae.
    GO:0005749    mitochondrial respiratory chain complex II, succinate dehydrogenase complex (ubiquinone)    A protein complex located in the mitochondrial inner membrane that forms part of the mitochondrial respiratory chain. Contains the four polypeptide subunits of succinate dehydrogenase, flavin-adenine dinucleotide and iron-sulfur. Catalyzes the oxidation of succinate by ubiquinone. Connects the TCA cycle with the respiratory chain.
    GO:0005739    mitochondrion    A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.

Chain B   (SDHB_CHICK | Q9YHT2)
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:0051538    3 iron, 4 sulfur cluster binding    Interacting selectively and non-covalently with a 3 iron, 4 sulfur (3Fe-4S) cluster; this cluster consists of three iron atoms, with the inorganic sulfur atoms found between the irons and acting as bridging ligands. It is essentially a 4Fe-4S cluster with one iron missing.
    GO:0051539    4 iron, 4 sulfur cluster binding    Interacting selectively and non-covalently with a 4 iron, 4 sulfur (4Fe-4S) cluster; this cluster consists of four iron atoms, with the inorganic sulfur atoms found between the irons and acting as bridging ligands.
    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: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:0008177    succinate dehydrogenase (ubiquinone) activity    Catalysis of the reaction: succinate + ubiquinone = fumarate + ubiquinol.
    GO:0048039    ubiquinone binding    Interacting selectively and non-covalently with ubiquinone, a quinone derivative with a tail of isoprene units.
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:0006099    tricarboxylic acid cycle    A nearly universal metabolic pathway in which the acetyl group of acetyl coenzyme A is effectively oxidized to two CO2 and four pairs of electrons are transferred to coenzymes. The acetyl group combines with oxaloacetate to form citrate, which undergoes successive transformations to isocitrate, 2-oxoglutarate, succinyl-CoA, succinate, fumarate, malate, and oxaloacetate again, thus completing the cycle. In eukaryotes the tricarboxylic acid is confined to the mitochondria. See also glyoxylate cycle.
cellular component
    GO:0016020    membrane    A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
    GO:0005743    mitochondrial inner membrane    The inner, i.e. lumen-facing, lipid bilayer of the mitochondrial envelope. It is highly folded to form cristae.
    GO:0005749    mitochondrial respiratory chain complex II, succinate dehydrogenase complex (ubiquinone)    A protein complex located in the mitochondrial inner membrane that forms part of the mitochondrial respiratory chain. Contains the four polypeptide subunits of succinate dehydrogenase, flavin-adenine dinucleotide and iron-sulfur. Catalyzes the oxidation of succinate by ubiquinone. Connects the TCA cycle with the respiratory chain.
    GO:0005739    mitochondrion    A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.

Chain C   (D0VWW3_CHICK | D0VWW3)
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:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0016627    oxidoreductase activity, acting on the CH-CH group of donors    Catalysis of an oxidation-reduction (redox) reaction in which a CH-CH group acts as a hydrogen or electron donor and reduces a hydrogen or electron acceptor.
    GO:0008177    succinate dehydrogenase (ubiquinone) activity    Catalysis of the reaction: succinate + ubiquinone = fumarate + ubiquinol.
    GO:0000104    succinate dehydrogenase activity    Catalysis of the reaction: succinate + acceptor = fumarate + reduced acceptor.
biological process
    GO:0006099    tricarboxylic acid cycle    A nearly universal metabolic pathway in which the acetyl group of acetyl coenzyme A is effectively oxidized to two CO2 and four pairs of electrons are transferred to coenzymes. The acetyl group combines with oxaloacetate to form citrate, which undergoes successive transformations to isocitrate, 2-oxoglutarate, succinyl-CoA, succinate, fumarate, malate, and oxaloacetate again, thus completing the cycle. In eukaryotes the tricarboxylic acid is confined to the mitochondria. See also glyoxylate cycle.
cellular component
    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:0005739    mitochondrion    A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.
    GO:0045281    succinate dehydrogenase complex    A multimeric complex which consists of flavoprotein (subunit A ; InterPro:IPR003952), iron-sulfur protein (subunit B) and membrane-bound cytochrome b560 (subunit C; InterPro:IPR000701). In some Archaea, the membrane-bound subunits (C or C and D) do not necessarily contain heme. Membrane-bound subunits can bind or react with quinones.

Chain D   (DHSD_CHICK | Q5ZIS0)
molecular function
    GO:0020037    heme binding    Interacting selectively and non-covalently with heme, any compound of iron complexed in a porphyrin (tetrapyrrole) ring.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0000104    succinate dehydrogenase activity    Catalysis of the reaction: succinate + acceptor = fumarate + reduced acceptor.
    GO:0048039    ubiquinone binding    Interacting selectively and non-covalently with ubiquinone, a quinone derivative with a tail of isoprene units.
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:0006099    tricarboxylic acid cycle    A nearly universal metabolic pathway in which the acetyl group of acetyl coenzyme A is effectively oxidized to two CO2 and four pairs of electrons are transferred to coenzymes. The acetyl group combines with oxaloacetate to form citrate, which undergoes successive transformations to isocitrate, 2-oxoglutarate, succinyl-CoA, succinate, fumarate, malate, and oxaloacetate again, thus completing the cycle. In eukaryotes the tricarboxylic acid is confined to the mitochondria. See also glyoxylate cycle.
cellular component
    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:0005740    mitochondrial envelope    The double lipid bilayer enclosing the mitochondrion and separating its contents from the cell cytoplasm; includes the intermembrane space.
    GO:0005743    mitochondrial inner membrane    The inner, i.e. lumen-facing, lipid bilayer of the mitochondrial envelope. It is highly folded to form cristae.
    GO:0005749    mitochondrial respiratory chain complex II, succinate dehydrogenase complex (ubiquinone)    A protein complex located in the mitochondrial inner membrane that forms part of the mitochondrial respiratory chain. Contains the four polypeptide subunits of succinate dehydrogenase, flavin-adenine dinucleotide and iron-sulfur. Catalyzes the oxidation of succinate by ubiquinone. Connects the TCA cycle with the respiratory chain.
    GO:0005739    mitochondrion    A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        DHSD_CHICK | Q5ZIS01yq4 2fbw 2h88 2h89 2wqy
        SDHA_CHICK | Q9YHT11yq4 2fbw 2h88 2h89 2wqy
        SDHB_CHICK | Q9YHT21yq4 2fbw 2h88 2h89 2wqy
UniProtKB/TrEMBL
        D0VWW3_CHICK | D0VWW31yq4 2fbw 2h88 2h89 2wqy

(-) Related Entries Specified in the PDB File

1yq4