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Title :   STRUCTURE OF THE ATP-SENSITIVE INWARD RECTIFIER POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM

Authors :   O. B. Clarke, A. T. Caputo, B. J. Smith, J. M. Gulbis

Date :   24 Jun 09 (Deposition) - 09 Jun 10 (Release) - 25 Apr 12 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.80

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

Keywords :   Integral Membrane Protein, Ionic Channel, Metal Transport, Ion Transport, Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   O. B. Clarke, A. T. Caputo, A. P. Hill, J. I. Vandenberg, B. J. Smith, J. M. Gulbis
Domain Reorientation And Rotation Of An Intracellular Assembly Regulate Conduction In Kir Potassium Channels.
Cell(Cambridge, Mass. ) V. 141 1018 2010
PubMed-ID: 20564790 | Reference-DOI: 10.1016/J.CELL.2010.05.003

Molecule 1 - ATP-SENSITIVE INWARD RECTIFIER POTASSIUM CHANNEL 10
	Chains	:	A, B
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PET-30A
	Expression System Strain	:	BL21STAR(DE3)
	Expression System Taxid	:	469008
	Expression System Vector Type	:	PLASMID
	Organism Scientific	:	MAGNETOSPIRILLUM MAGNETOTACTICUM
	Organism Taxid	:	188
	Synonym	:	KIRBAC3.1

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

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (3, 7)

No.	Name	Count	Type	Full Name
1	CL	1	Ligand/Ion	CHLORIDE ION
2	K	5	Ligand/Ion	POTASSIUM ION
3	SPM	1	Ligand/Ion	SPERMINE

Biological Unit 1 (1, 2)

No.	Name	Count	Type	Full Name
1	CL	-1	Ligand/Ion	CHLORIDE ION
2	K	-1	Ligand/Ion	POTASSIUM ION
3	SPM	2	Ligand/Ion	SPERMINE

Asymmetric Unit (6, 6)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	THR A:96 , ILE A:97 , K A:1303 , K A:1304 , THR B:96 , ILE B:97	BINDING SITE FOR RESIDUE K A1302
2	AC2	SOFTWARE	THR A:96 , K A:1302 , THR B:96	BINDING SITE FOR RESIDUE K A1303
3	AC3	SOFTWARE	ILE A:97 , GLY A:98 , K A:1302 , K A:1305 , ILE B:97 , GLY B:98	BINDING SITE FOR RESIDUE K A1304
4	AC4	SOFTWARE	GLY A:98 , TYR A:99 , K A:1304 , GLY B:98 , TYR B:99	BINDING SITE FOR RESIDUE K A1305
5	AC5	SOFTWARE	TYR A:132 , TYR B:132 , HOH B:2018 , HOH B:2019	BINDING SITE FOR RESIDUE SPM B1302
6	AC6	SOFTWARE	ARG A:194 , ARG B:202	BINDING SITE FOR RESIDUE CL A1306

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

(no "Cis Peptide Bond" information available for 2WLK)

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

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

(no "Exon" information available for 2WLK)

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:291
 aligned with IRK10_MAGMG | D9N164 from UniProtKB/Swiss-Prot  Length:295

    Alignment length:291
                                                                                                                                                                                                                                                                                                                      295      
                                    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    |    - 
          IRK10_MAGMG    11 KPRILNSDGSSNITRLGLEKRGWLDDHYHDLLTVSWPVFITLITGLYLVTNALFALAYLACGDVIENARPGSFTDAFFFSVQTMATIGYGKLIPIGPLANTLVTLEALCGMLGLAVAASLIYARFTRPTAGVLFSSRMVISDFEGKPTLMMRLANLRIEQIIEADVHLVLVRSEISQEGMVFRRFHDLTLTRSRSPIFSLSWTVMHPIDHHSPIYGETDETLRNSHSEFLVLFTGHHEAFAQNVHARHAYSCDEIIWGGHFVDVFTTLPDGRRALDLGKFHEIAQ------   -
               SCOP domains d2wlka1 A:11-138 Inward rectifier potassium channel kirbac3.1                                                                   d2wlka2 A:139-301 Inward rectifier potassium channel kirbac3.1                                                                                                      SCOP domains
               CATH domains --------------------2wlkA01 A:31-138  [code=1.10.287.70, no name defined]                                                       2wlkA02 A:139-301 G protein-activated inward rectifier potassium channel 1                                                                                          CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .............eee.......hhhhhhhh...hhhhhhhhhhhhhhhhhhhhhhhhhh...........hhhhhhhhhhhhhh...........hhhhhhhhhhhhhhhhhhhhhhhhhhhh.......eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeee......eeeee..eeeeeee..........hhhhhhhh..eeeeeeeeee....eeeeeeeeee...eee..ee...eeee...eeee.hhhh..ee....... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2wlk A  11 KPRILNSDGSSNITRLGLEKRGWLDDHYHDLLTVSWPVFITLITGLYLVTNALFALAYLACGDVIENARPGSFTDAFFFSVQTMATIGYGKLIPIGPLANTLVTLEALCGMLGLAVAASLIYARFTRPTAGVLFSSRMVISDFEGKPTLMMRLANLRIEQIIEADVHLVLVRSEISQEGMVFRRFHDLTLTRSRSPIFSLSWTVMHPIDHHSPIYGETDETLRNSHSEFLVLFTGHHEAFAQNVHARHAYSCDEIIWGGHFVDVFTTLPDGRRALDLGKFHEIAQHHHHHH 301
                                    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       300

Chain B from PDB  Type:PROTEIN  Length:291
 aligned with IRK10_MAGMG | D9N164 from UniProtKB/Swiss-Prot  Length:295

    Alignment length:291
                                                                                                                                                                                                                                                                                                                      295      
                                    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    |    - 
          IRK10_MAGMG    11 KPRILNSDGSSNITRLGLEKRGWLDDHYHDLLTVSWPVFITLITGLYLVTNALFALAYLACGDVIENARPGSFTDAFFFSVQTMATIGYGKLIPIGPLANTLVTLEALCGMLGLAVAASLIYARFTRPTAGVLFSSRMVISDFEGKPTLMMRLANLRIEQIIEADVHLVLVRSEISQEGMVFRRFHDLTLTRSRSPIFSLSWTVMHPIDHHSPIYGETDETLRNSHSEFLVLFTGHHEAFAQNVHARHAYSCDEIIWGGHFVDVFTTLPDGRRALDLGKFHEIAQ------   -
               SCOP domains d2wlkb1 B:11-138 Inward rectifier potassium channel kirbac3.1                                                                   d2wlkb2 B:139-301 Inward rectifier potassium channel kirbac3.1                                                                                                      SCOP domains
               CATH domains --------------------2wlkB01 B:31-138  [code=1.10.287.70, no name defined]                                                       2wlkB02 B:139-301 G protein-activated inward rectifier potassium channel 1                                                                                          CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author .......................hhhhhhhhh..hhhhhhhhhhhhhhhhhhhhhhhhhh...........hhhhhhhhhhhhhh...........hhhhhhhhhhhhhhhhhhhhhhhhhhhh.......eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeee......eeeee..eeeeeee..........hhhhhhhh..eeeeeeeeee....eeeeeeeeee...eee..ee...eeee...eeeee.hhh..ee....... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2wlk B  11 KPRILNSDGSSNITRLGLEKRGWLDDHYHDLLTVSWPVFITLITGLYLVTNALFALAYLACGDVIENARPGSFTDAFFFSVQTMATIGYGKLIPIGPLANTLVTLEALCGMLGLAVAASLIYARFTRPTAGVLFSSRMVISDFEGKPTLMMRLANLRIEQIIEADVHLVLVRSEISQEGMVFRRFHDLTLTRSRSPIFSLSWTVMHPIDHHSPIYGETDETLRNSHSEFLVLFTGHHEAFAQNVHARHAYSCDEIIWGGHFVDVFTTLPDGRRALDLGKFHEIAQHHHHHH 301
                                    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       300

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)

Magnetospirillum magnetotacticum. Organism_taxid: 188. (11)

1a	2wlkA01	A:31-138
1b	2wlkB01	B:31-138

Class: Mainly Beta (13760)

Architecture: Sandwich (5577)

Topology: Immunoglobulin-like (3897)

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

Magnetospirillum magnetotacticum. Organism_taxid: 188. (11)

2a	2wlkA02	A:139-301
2b	2wlkB02	B:139-301

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

Asymmetric Unit(hide GO term definitions)

Chain A,B (IRK10_MAGMG | D9N164)

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.
	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: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.
	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: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: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.

Asymmetric Unit
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	Cis Peptide Bonds
(no "Cis Peptide Bonds" information available for 2wlk)

Biological Unit
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		Biological Unit 1	[ Jena3D ]

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UniProtKB/Swiss-Prot
	IRK10_MAGMG \| D9N164	:	1xl6 2wlh 2wli 2wlj 2wlm 2wln 2wlo 2x6a 2x6b 2x6c 3zrs 4lp8

1xl4	INTERMEDIATE GATING STRUCTURE 1 OF THE INWARDLY RECTIFYINGK+ CHANNEL KIRBAC3.1
1xl6	INTERMEDIATE GATING STRUCTURE 2 OF THE INWARDLY RECTIFYINGK+ CHANNEL KIRBAC3.1
2wlh	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wli	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wlj	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wll	POTASSIUM CHANNEL FROM BURKHOLDERIA PSEUDOMALLEI
2wlm	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wln	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2wlo	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2x6a	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2x6b	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM
2x6c	POTASSIUM CHANNEL FROM MAGNETOSPIRILLUM MAGNETOTACTICUM

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (3, 7)

Sites (6, 6)

SS Bonds (0, 0)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (0, 0)

Exons (0, 0)

Sequences/Alignments

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SCOP Domains (2, 4)

CATH Domains (2, 4)

Pfam Domains (0, 0)

Gene Ontology (9, 9)

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