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Title :   INWARD RECTIFIER POTASSIUM CHANNEL KIR2.2 R186A MUTANT IN COMPLEX WITH PIP2

Authors :   S. B. Hansen, X. Tao, R. Mackinnon

Date :   01 Jul 11 (Deposition) - 24 Aug 11 (Release) - 21 Sep 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.61

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

Keywords :   Pip, Membrane Protein, Lipid, Receptor, Metal Transport (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   S. B. Hansen, X. Tao, R. Mackinnon
Structural Basis Of Pip(2) Activation Of The Classical Inward Rectifier K(+) Channel Kir2. 2.
Nature V. 477 495 2011
PubMed-ID: 21874019 | Reference-DOI: 10.1038/NATURE10370

Molecule 1 - INWARD-RECTIFIER K+ CHANNEL KIR2.2
	Chains	:	A
	Engineered	:	YES
	Expression System	:	PICHIA PASTORIS
	Expression System Taxid	:	4922
	Gene	:	KIR2.2
	Mutation	:	YES
	Organism Common	:	CHICKEN
	Organism Scientific	:	GALLUS GALLUS
	Organism Taxid	:	9031
	Synonym	:	INWARD RECTIFIER POTASSIUM CHANNEL 2.2

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

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (2, 7)

No.	Name	Count	Type	Full Name
1	K	6	Ligand/Ion	POTASSIUM ION
2	PIO	1	Ligand/Ion	L-ALPHA-D-MYOPHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE,D(+)SN1,2DI-O-OCTANOYLGLYCERYL

Biological Unit 1 (1, 4)

No.	Name	Count	Type	Full Name
1	K	-1	Ligand/Ion	POTASSIUM ION
2	PIO	4	Ligand/Ion	L-ALPHA-D-MYOPHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE,D(+)SN1,2DI-O-OCTANOYLGLYCERYL

Asymmetric Unit (5, 5)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	GLY A:145 , TYR A:146 , K A:502	BINDING SITE FOR RESIDUE K A 501
2	AC2	SOFTWARE	ILE A:144 , GLY A:145 , K A:501 , K A:503	BINDING SITE FOR RESIDUE K A 502
3	AC3	SOFTWARE	THR A:143 , ILE A:144 , K A:502 , K A:504	BINDING SITE FOR RESIDUE K A 503
4	AC4	SOFTWARE	THR A:143 , K A:503	BINDING SITE FOR RESIDUE K A 504
5	AC5	SOFTWARE	ARG A:78 , TRP A:79 , ARG A:80 , LEU A:83 , LYS A:183 , LYS A:188 , LYS A:189	BINDING SITE FOR RESIDUE PIO A 400

Asymmetric Unit

No.	Residues
1	A:123	-	A:155

(no "Cis Peptide Bond" information available for 3SPG)

(no "SAP(SNP)/Variant" information available for 3SPG)

(no "PROSITE Motif" information available for 3SPG)

(no "Exon" information available for 3SPG)

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:332
 aligned with KCJ12_CHICK | F1NHE9 from UniProtKB/Swiss-Prot  Length:429

    Alignment length:332
                                    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       370  
          KCJ12_CHICK    41 CRNRFVKKNGQCNVEFTNMDDKPQRYIADMFTTCVDIRWRYMLLLFSLAFLVSWLLFGLIFWLIALIHGDLENPGGDDTFKPCVLQVNGFVAAFLFSIETQTTIGYGFRCVTEECPLAVFMVVVQSIVGCIIDSFMIGAIMAKMARPKKRAQTLLFSHNAVVAMRDGKLCLMWRVGNLRKSHIVEAHVRAQLIKPRITEEGEYIPLDQIDIDVGFDKGLDRIFLVSPITILHEINEDSPLFGISRQDLETDDFEIVVILEGMVEATAMTTQARSSYLASEILWGHRFEPVLFEEKNQYKVDYSHFHKTYEVPSTPRCSAKDLVENKFLLPST 372
               SCOP domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ....................hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..........ee...hhhhhhhhhhhhhh.......ee...hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.eee...eeeeee..eeeeeeeeee.....eeeeeeeeeeeeeee.....eeeeeeee.................eeeeee..........hhhhhhhh..eeeeeeeeee....eeeeeeeeee...eee.eee...eeee..eeee.......eee.......hhhhhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3spg A  41 CRNRFVKKNGQCNVEFTNMDDKPQRYIADMFTTCVDIRWRYMLLLFSLAFLVSWLLFGLIFWLIALIHGDLENPGGDDTFKPCVLQVNGFVAAFLFSIETQTTIGYGFRCVTEECPLAVFMVVVQSIVGCIIDSFMIGAIMAKMAAPKKRAQTLLFSHNAVVAMRDGKLCLMWRVGNLRKSHIVEAHVRAQLIKPRITEEGEYIPLDQIDIDVGFDKGLDRIFLVSPITILHEINEDSPLFGISRQDLETDDFEIVVILEGMVEATAMTTQARSSYLASEILWGHRFEPVLFEEKNQYKVDYSHFHKTYEVPSTPRCSAKDLVENKFLLSNS 372
                                    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       370

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 3SPG)

(no "CATH Domain" information available for 3SPG)

(no "Pfam Domain" information available for 3SPG)

Asymmetric Unit(hide GO term definitions)

Chain A (KCJ12_CHICK | F1NHE9)

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: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:0051289	protein homotetramerization	The formation of a protein homotetramer, a macromolecular structure consisting of four noncovalently associated identical subunits.
	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: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:0031224	intrinsic component of membrane	The component of a membrane consisting of the gene products having some covalently attached portion, for example part of a peptide sequence or some other covalently attached group such as a GPI anchor, which spans or is embedded in one or both leaflets 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.

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	3spg
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UniProtKB/Swiss-Prot
	KCJ12_CHICK \| F1NHE9	:	3jyc 3spc 3sph 3spi 3spj 5kuk 5kum

3spc	KIR2.2 IN COMPLEX WITH DIOCTANOYLGLYCEROL PYROPHOSPHATE (DGPP)
3sph	KIR2.2 I223L MUTANT IN COMPLEX WITH PIP2
3spi	KIR2.2 IN COMPLEX WITH PIP2
3spj	APO KIR2.2 I223L MUTANT

Description

Compounds

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Chains, Units

Ligands, Modified Residues, Ions (2, 7)

Sites (5, 5)

SS Bonds (1, 1)

Cis Peptide Bonds (0, 0)

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Gene Ontology (13, 13)

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