1P7B - JenaLib

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Title :   CRYSTAL STRUCTURE OF AN INWARD RECTIFIER POTASSIUM CHANNEL

Authors :   A. Kuo, J. M. Gulbis, J. F. Antcliff, T. Rahman, E. D. Lowe, J. Zimmer, J. Cuthbertson, F. M. Ashcroft, T. Ezaki, D. A. Doyle

Date :   01 May 03 (Deposition) - 17 Jun 03 (Release) - 13 Jul 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   3.65

Chains :   Asym. Unit : A,B
Biol. Unit 1: A,B  (2x)

Keywords :   Transmembrane Helices, Ion Conduction, Immunoglobulin Fold, Cytosolic Assembly, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   A. Kuo, J. M. Gulbis, J. F. Antcliff, T. Rahman, E. D. Lowe, J. Zimmer, J. Cuthbertson, F. M. Ashcroft, T. Ezaki, D. A. Doyle
Crystal Structure Of The Potassium Channel Kirbac1. 1 In The Closed State.
Science V. 300 1922 2003
PubMed-ID: 12738871 | Reference-DOI: 10.1126/SCIENCE.1085028

Molecule 1 - INTEGRAL MEMBRANE CHANNEL AND CYTOSOLIC DOMAINS
	Chains	:	A, B
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PET30A
	Expression System Strain	:	BL21 (DE3) STAR
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Fragment	:	POTASSIUM CHANNEL, C-TERMINAL DOMAIN RELATED TO GIRK
	Gene	:	CHROMOSOME 1 KIRBAC1.1
	Organism Scientific	:	BURKHOLDERIA PSEUDOMALLEI
	Organism Taxid	:	28450

		1	2
Asymmetric Unit	:	A	B
Biological Unit 1 (2x)	:	A	B

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (1, 4)

No.	Name	Count	Type	Full Name
1	K	4	Ligand/Ion	POTASSIUM ION

Biological Unit 1 (0, 0)

No.	Name	Count	Type	Full Name
1	K	-1	Ligand/Ion	POTASSIUM ION

Asymmetric Unit (3, 3)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	GLY A:112 , TYR A:113 , K A:403 , GLY B:112 , TYR B:113	BINDING SITE FOR RESIDUE K B 401
2	AC2	SOFTWARE	THR A:110 , THR B:110	BINDING SITE FOR RESIDUE K A 402
3	AC3	SOFTWARE	VAL A:111 , VAL B:111 , K B:401	BINDING SITE FOR RESIDUE K A 403

(no "SS Bond" information available for 1P7B)

(no "Cis Peptide Bond" information available for 1P7B)

(no "SAP(SNP)/Variant" information available for 1P7B)

(no "PROSITE Motif" information available for 1P7B)

(no "Exon" information available for 1P7B)

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:258
 aligned with P83698_BURPE | P83698 from UniProtKB/TrEMBL  Length:333

    Alignment length:274
                                    45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305    
         P83698_BURPE    36 REVIAYGMPASVWRDLYYWALKVSWPVFFASLAALFVVNNTLFALLYQLGDAPIANQSPPGFVGAFFFSVETLATVGYGDMHPQTVYAHAIATLEIFVGMSGIALSTGLVFARFARPRAKIMFARHAIVRPFNGRMTLMVRAANARQNVIAEARAKMRLMRREHSSEGYSLMKIHDLKLVRNEHPIFLLGWNMMHVIDESSPLFGETPESLAEGRAMLLVMIEGSDETTAQVMQARHAWEHDDIRWHHRYVDLMSDVDGMTHIDYTRFNDTEPV 309
               SCOP domains d1p7ba2 A:36-151 Inward rectifier potassium channel Kirbac1.1                                                       d1p7ba1 A:152-309 Inward rectifier potassium           channel Kirbac1.1                                                                                       SCOP domains
               CATH domains ---------1p7bA01 A:45-152  [code=1.10.287.70, no name defined]                                                       1p7bA02 A:153-309 G protein-activated inwar          d rectifier potassium channel 1                                                                          CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .....ee...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh................hhhhhhhhh..............hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh......ee...eeeee....eeeeeeee........eeeeeee..----------..ee..hhhhh.........eeeeee..........hhhhhhhh..eeeeeeeee......eeeeeeeee...eee........------.............. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1p7b A  36 REVIAYGMPASVWRDLYYWALKVSWPVFFASLAALFVVNNTLFALLYQLGDAPIANQSPPGFVGAFFFSVETLATVGYGDMHPQTVYAHAIATLEIFVGMSGIALSTGLVFARFARPRAKIMFARHAIVRPFNGRMTLMVRAANARQNVIAEARAKMRLM----------LMKIHDLKLVRNEHPIFLLGWNMMHVIDESSPLFGETPESLAEGRAMLLVMIEGSDETTAQVMQARHAWEHDDIRWHHRYVDLM------THIDYTRFNDTEPV 309
                                    45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195         -|      215       225       235       245       255       265       275       285   |     -|      305    
                                                                                                                                                                                         195        206                                                                                289    296

Chain B from PDB  Type:PROTEIN  Length:258
 aligned with P83698_BURPE | P83698 from UniProtKB/TrEMBL  Length:333

    Alignment length:274
                                    45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285       295       305    
         P83698_BURPE    36 REVIAYGMPASVWRDLYYWALKVSWPVFFASLAALFVVNNTLFALLYQLGDAPIANQSPPGFVGAFFFSVETLATVGYGDMHPQTVYAHAIATLEIFVGMSGIALSTGLVFARFARPRAKIMFARHAIVRPFNGRMTLMVRAANARQNVIAEARAKMRLMRREHSSEGYSLMKIHDLKLVRNEHPIFLLGWNMMHVIDESSPLFGETPESLAEGRAMLLVMIEGSDETTAQVMQARHAWEHDDIRWHHRYVDLMSDVDGMTHIDYTRFNDTEPV 309
               SCOP domains d1p7bb2 B:36-151 Inward rectifier potassium channel Kirbac1.1                                                       d1p7bb1 B:152-309 Inward rectifier potassium           channel Kirbac1.1                                                                                       SCOP domains
               CATH domains ---------1p7bB01 B:45-152  [code=1.10.287.70, no name defined]                                                       1p7bB02 B:153-309 G protein-activated inwar          d rectifier potassium channel 1                                                                          CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh................hhhhhhhhh..............hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh......ee...eeeee....eeeeeeee........eeeeeee..----------..ee..hhhhh.........eeeeee..........hhhhhhhh..eeeeeeeee......eeeeeeeee...eee........------..ee.hhh...... Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1p7b B  36 REVIAYGMPASVWRDLYYWALKVSWPVFFASLAALFVVNNTLFALLYQLGDAPIANQSPPGFVGAFFFSVETLATVGYGDMHPQTVYAHAIATLEIFVGMSGIALSTGLVFARFARPRAKIMFARHAIVRPFNGRMTLMVRAANARQNVIAEARAKMRLM----------LMKIHDLKLVRNEHPIFLLGWNMMHVIDESSPLFGETPESLAEGRAMLLVMIEGSDETTAQVMQARHAWEHDDIRWHHRYVDLM------THIDYTRFNDTEPV 309
                                    45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195         -|      215       225       235       245       255       265       275       285   |     -|      305    
                                                                                                                                                                                         195        206                                                                                289    296

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

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Mainly Alpha (13335)

Architecture: Orthogonal Bundle (10391)

Topology: Helix Hairpins (718)

Homologous Superfamily: [code=1.10.287.70, no name defined] (106)

Burkholderia pseudomallei. Organism_taxid: 28450. (2)

1a	1p7bA01	A:45-152
1b	1p7bB01	B:45-152

Class: Mainly Beta (13760)

Architecture: Sandwich (5577)

Topology: Immunoglobulin-like (3897)

Homologous Superfamily: G protein-activated inward rectifier potassium channel 1 (21)

Burkholderia pseudomallei. Organism_taxid: 28450. (2)

2a	1p7bA02	A:153-309
2b	1p7bB02	B:153-309

(no "Pfam Domain" information available for 1P7B)

Asymmetric Unit(hide GO term definitions)

Chain A,B (P83698_BURPE | P83698)

molecular function
	GO:0005242	inward rectifier potassium channel activity	Enables the transmembrane transfer of a potassium ion by an inwardly-rectifying voltage-gated channel. An inwardly rectifying current-voltage relation is one where at any given driving force the inward flow of K+ ions exceeds the outward flow for the opposite driving force. The inward-rectification is due to a voltage-dependent block of the channel pore by a specific ligand or ligands, and as a result the macroscopic conductance depends on the difference between membrane voltage and the K+ equilibrium potential rather than on membrane voltage itself.
biological process
	GO:0071805	potassium ion transmembrane transport	A process in which a potassium ion is transported from one side of a membrane to the other.
	GO:0006813	potassium ion transport	The directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
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.

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