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Title :   CRYSTAL STRUCTURE OF A KIR3.1-PROKARYOTIC KIR CHANNEL CHIMERA

Authors :   M. Nishida, R. Mackinnon

Date :   11 Jul 07 (Deposition) - 28 Aug 07 (Release) - 07 Jun 17 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.20

Chains :   Asym. Unit : A,B
Biol. Unit 1: A  (4x)
Biol. Unit 2: B  (4x)

Keywords :   Chimera, G-Protein Gated Inward Rectifier, Potassium Channel, Selectivity Filter, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   M. Nishida, M. Cadene, B. T. Chait, R. Mackinnon
Crystal Structure Of A Kir3. 1-Prokaryotic Kir Channel Chimera.
Embo J. V. 26 4005 2007
PubMed-ID: 17703190 | Reference-DOI: 10.1038/SJ.EMBOJ.7601828

Molecule 1 - KIR3.1-PROKARYOTIC KIR CHANNEL CHIMERA
	Chains	:	A, B
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI BL21(DE3)
	Expression System Plasmid	:	PET28B(+)
	Expression System Strain	:	BL21(DE3)
	Expression System Taxid	:	469008
	Expression System Vector Type	:	PLASMID
	Fragment	:	KIR3.1 (RESIDUES 3-44, 125-318), KIRBAC1.3 TRANSMEMBRANE DOMAIN (RESIDUES 45-124)
	Mutation	:	YES
	Organism Common	:	MOUSE
	Organism Scientific	:	MUS MUSCULUS, PARABURKHOLDERIA XENOVORANS
	Organism Taxid	:	10090, 266265
	Strain	:	LB400
	Synonym	:	GIRK1, POTASSIUM CHANNEL, INWARDLY RECTIFYING SUBFAMILY J MEMBER 3, INWARD RECTIFIER K+, CHANNEL KIR3.1

		1	2
Asymmetric Unit	:	A	B
Biological Unit 1 (4x)	:	A
Biological Unit 2 (4x)	:		B

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (2, 13)

No.	Name	Count	Type	Full Name
1	BNG	1	Ligand/Ion	B-NONYLGLUCOSIDE
2	K	12	Ligand/Ion	POTASSIUM ION

Biological Unit 1 (1, 4)

No.	Name	Count	Type	Full Name
1	BNG	4	Ligand/Ion	B-NONYLGLUCOSIDE
2	K	-1	Ligand/Ion	POTASSIUM ION

Biological Unit 2 (0, 0)

No.	Name	Count	Type	Full Name
1	BNG	-1	Ligand/Ion	B-NONYLGLUCOSIDE
2	K	-1	Ligand/Ion	POTASSIUM ION

Asymmetric Unit (10, 10)

No.	Name	Evidence	Residues	Description
01	AC1	SOFTWARE	TYR A:29 , LEU A:30 , SER A:31 , PHE A:34 , TRP A:42 , LEU A:49 , LEU A:52 , LEU A:122 , CYS A:126 , LYS A:130 , MET A:131 , GLN A:133 , PRO A:134 , LYS A:135	BINDING SITE FOR RESIDUE BNG A 322
02	AC2	SOFTWARE	GLY A:94 , TYR A:95 , K A:402	BINDING SITE FOR RESIDUE K A 401
03	AC3	SOFTWARE	VAL A:93 , GLY A:94 , K A:401 , K A:403	BINDING SITE FOR RESIDUE K A 402
04	AC4	SOFTWARE	THR A:92 , VAL A:93 , K A:402 , K A:404	BINDING SITE FOR RESIDUE K A 403
05	AC5	SOFTWARE	THR A:92 , K A:403 , HOH A:528	BINDING SITE FOR RESIDUE K A 404
06	AC6	SOFTWARE	GLY B:94 , TYR B:95 , K B:409	BINDING SITE FOR RESIDUE K B 408
07	AC7	SOFTWARE	VAL B:93 , GLY B:94 , K B:408 , K B:410	BINDING SITE FOR RESIDUE K B 409
08	AC8	SOFTWARE	THR B:92 , VAL B:93 , K B:409 , K B:411	BINDING SITE FOR RESIDUE K B 410
09	AC9	SOFTWARE	THR B:92 , K B:410	BINDING SITE FOR RESIDUE K B 411
10	BC1	SOFTWARE	HOH B:486	BINDING SITE FOR RESIDUE K B 412

(no "SS Bond" information available for 2QKS)

Asymmetric Unit

No.	Residues
1	Phe A:75	-	Pro A:76
2	Phe B:75	-	Pro B:76

(no "SAP(SNP)/Variant" information available for 2QKS)

(no "PROSITE Motif" information available for 2QKS)

(no "Exon" information available for 2QKS)

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:302
 aligned with KCNJ3_MOUSE | P63250 from UniProtKB/Swiss-Prot  Length:501

    Alignment length:324
                                    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       300       310       320       330       340       350       360    
          KCNJ3_MOUSE    41 KKRQRFVDKNGRCNVQHGNLGSETSRYLSDLFTTLVDLKWRWNLFIFILTYTVAWLFMASMWWVIAYTRGDLNKAHVGNYTPCVANVYNFPSAFLFFIETEATIGYGYRYITDKCPEGIILFLFQSILGSIVDAFLIGCMFIKMSQPKKRAETLMFSEHAVISMRDGKLTLMFRVGNLRNSHMVSAQIRCKLLKSRQTPEGEFLPLDQLELDVGFSTGADQLFLVSPLTICHVIDAKSPFYDLSQRSMQTEQFEVVVILEGIVETTGMTCQARTSYTEDEVLWGHRFFPVISLEEGFFKVDYSQFHATFEVPTPPYSVKEQEEM 364
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SCOP domains
               CATH domains --------------------------2qksA01 A:29-134      [code=1.10. 287.70, no    name defin     ed]                                                       2qksA02 A:135-311 G protein-activated inward rectifier potassium channel 1                                                                                                        CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Pfam domains
         Sec.struct. author ...................-------.hhhhhhhhhhhhhhh----hhhhhhhhhhhhh-hhhhhhhhh.---..........h-----hhhhhhhhhhhhh.....--.....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..hhhh.eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeeeee................eeeeee..........hhhhhh....eeeeeeeeee....eeeeeeeeee...eee.eee...eee....eee.hhhh..eee......hhhhhhh. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Transcript
                 2qks A   3 KKRQRFVDKNGRCNVQHGN-------YLSDLFTTLVDLKWRW----FFVSLAVLFLLLN-TAFATLYMLG---SAPIANQFPAG-----FGGAFFFSVETLATVGYG--DMHPQTVYAHWIATLEIFVGMSSIALATGCAFIKMSQPKKRAETLMFSEHAVISMRDGKLTLMFRVGNLRNSHMVSAQIRCKLLKSRQTPEGEFLPLDQLELDVGFSTGADQLFLVSPLTICHVIDAKSPFYDLSQRSMQTEQFEVVVILEGIVETTGMTCQARTSYTEDEVLWGHRFFPVISLEEGFFKVDYSQFHATFEVPTPPYSVKEQEEM 311
                                    12        |-      | 32        42 |    | 48        |-|       67   |    74   |    79        89      | 97       107       117       127       137       147       157       167       177       187       197       207       217       227       237       247       257       267       277       287       297       307    
                                             21      29             44   45          57 |       67  68        78    79               96 97                                                                                                                                                                                                                      
                                                                                       58

Chain B from PDB  Type:PROTEIN  Length:294
 aligned with KCNJ3_MOUSE | P63250 from UniProtKB/Swiss-Prot  Length:501

    Alignment length:329
                                    52        62        72        82        92       102       112       122       132       142       152       162       172       182       192       202       212       222       232       242       252       262       272       282       292       302       312       322       332       342       352       362         
          KCNJ3_MOUSE    43 RQRFVDKNGRCNVQHGNLGSETSRYLSDLFTTLVDLKWRWNLFIFILTYTVAWLFMASMWWVIAYTRGDLNKAHVGNYTPCVANVYNFPSAFLFFIETEATIGYGYRYITDKCPEGIILFLFQSILGSIVDAFLIGCMFIKMSQPKKRAETLMFSEHAVISMRDGKLTLMFRVGNLRNSHMVSAQIRCKLLKSRQTPEGEFLPLDQLELDVGFSTGADQLFLVSPLTICHVIDAKSPFYDLSQRSMQTEQFEVVVILEGIVETTGMTCQARTSYTEDEVLWGHRFFPVISLEEGFFKVDYSQFHATFEVPTPPYSVKEQEEMLLMSSPL 371
               SCOP domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains 2qksB01      --------------2qksB02 B:32-    133  [code=1. 10.287.70,    no name de     fined]                                                   ------2qksB01 B:5-17,B:140-318 G protein-activated inward rectifier potassium channel 1                                                                                                   CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .............--------------hhhhhhhhhhhhh----hhhhhhhhhhhhh-hhhhhhhhh.---..........h-----hhhhhhhhhhhhh.....--.....hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.------.eee...eeeeee..eeeeeeeeee.......eeeeeeeee..ee.....ee...eeee.........eee....eeeeee..........hhhhhh....eeeeeeeee......eeeeeeeee...eee.eee...eee....eee.hhhh..eee......hhhhhhhhhhh.... Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2qks B   5 RQRFVDKNGRCNV--------------DLFTTLVDLKWRW----FFVSLAVLFLLLN-TAFATLYMLG---SAPIANQFPAG-----FGGAFFFSVETLATVGYG--DMHPQTVYAHWIATLEIFVGMSSIALATGCAFIKMSQ------TLMFSEHAVISMRDGKLTLMFRVGNLRNSHMVSAQIRCKLLKSRQTPEGEFLPLDQLELDVGFSTGADQLFLVSPLTICHVIDAKSPFYDLSQRSMQTEQFEVVVILEGIVETTGMTCQARTSYTEDEVLWGHRFFPVISLEEGFFKVDYSQFHATFEVPTPPYSVKEQEEMLLMSSPL 318
                                    14  |      -       |34        44    |   50      | 59       | - |      76 |     |81        91    |  |99       109       119       129   |     -|      149       159       169       179       189       199       209       219       229       239       249       259       269       279       289       299       309         
                                       17             32          44   45          57 |       67  68        78    79               96 97                                 133    140                                                                                                                                                                                  
                                                                                     58

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 '\|'

(no "SCOP Domain" information available for 2QKS)

(no "Pfam Domain" information available for 2QKS)

Asymmetric Unit(hide GO term definitions)

Chain A,B (KCNJ3_MOUSE | P63250)

molecular function
	GO:0015467	G-protein activated inward rectifier potassium channel activity	Enables the transmembrane transfer of a potassium ion by an inwardly-rectifying voltage-gated channel, where the inward rectification is due to a voltage-dependent block of the channel pore by a G protein. 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.
	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.
	GO:0005244	voltage-gated ion channel activity	Enables the transmembrane transfer of an ion by a voltage-gated channel. An ion is an atom or group of atoms carrying an electric charge by virtue of having gained or lost one or more electrons. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded.
biological process
	GO:0006811	ion transport	The directed movement of charged atoms or small charged molecules into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.
	GO:0010107	potassium ion import	The directed movement of potassium ions into a cell or organelle.
	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.
	GO:0034765	regulation of ion transmembrane transport	Any process that modulates the frequency, rate or extent of the directed movement of ions from one side of a membrane to the other.
	GO:0051602	response to electrical stimulus	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an electrical stimulus.
	GO:0006810	transport	The directed movement of substances (such as macromolecules, small molecules, ions) or cellular components (such as complexes and organelles) into, out of or within a cell, or between cells, or within a multicellular organism by means of some agent such as a transporter, pore or motor protein.
cellular component
	GO:0030315	T-tubule	Invagination of the plasma membrane of a muscle cell that extends inward from the cell surface around each myofibril. The ends of T-tubules make contact with the sarcoplasmic reticulum membrane.
	GO:0009986	cell surface	The external part of the cell wall and/or plasma membrane.
	GO:0009897	external side of plasma membrane	The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.
	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:0005887	integral component of plasma membrane	The component of the plasma 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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Description

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Chains, Units

Ligands, Modified Residues, Ions (2, 13)

Sites (10, 10)

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