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3SYA

Crystal structure of the G protein-gated inward rectifier K+ channel GIRK2 (Kir3.2) in complex with sodium and PIP2

Functional Information from GO Data
ChainGOidnamespacecontents
A0005242molecular_functioninward rectifier potassium channel activity
A0006813biological_processpotassium ion transport
A0016020cellular_componentmembrane
Functional Information from PDB Data
site_idAC1
Number of Residues3
DetailsBINDING SITE FOR RESIDUE NA A 600
ChainResidue
AASP228
AARG230
ASER232

site_idAC2
Number of Residues8
DetailsBINDING SITE FOR RESIDUE PIO A 400
ChainResidue
ALYS199
ALYS200
ALYS64
ALYS90
ATRP91
AARG92
ALYS194
AGLN197

site_idAC3
Number of Residues8
DetailsBINDING SITE FOR RESIDUE K A 501
ChainResidue
AGLY156
AGLY156
AGLY156
AGLY156
AK502
AK502
AK502
AK502

site_idAC4
Number of Residues16
DetailsBINDING SITE FOR RESIDUE K A 502
ChainResidue
AILE155
AILE155
AILE155
AILE155
AGLY156
AGLY156
AGLY156
AGLY156
AK501
AK501
AK501
AK501
AK503
AK503
AK503
AK503

site_idAC5
Number of Residues16
DetailsBINDING SITE FOR RESIDUE K A 503
ChainResidue
ATHR154
ATHR154
ATHR154
ATHR154
AILE155
AILE155
AILE155
AILE155
AK502
AK502
AK502
AK502
AK504
AK504
AK504
AK504

site_idAC6
Number of Residues8
DetailsBINDING SITE FOR RESIDUE K A 504
ChainResidue
ATHR154
ATHR154
ATHR154
ATHR154
AK503
AK503
AK503
AK503

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues24
DetailsTransmembrane: {"description":"Helical; Name=M1","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues31
DetailsTopological domain: {"description":"Extracellular","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues11
DetailsIntramembrane: {"description":"Helical; Pore-forming; Name=H5","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues6
DetailsIntramembrane: {"description":"Pore-forming","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues21
DetailsTransmembrane: {"description":"Helical; Name=M2","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues5
DetailsMotif: {"description":"Selectivity filter","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues1
DetailsSite: {"description":"Role in the control of polyamine-mediated channel gating and in the blocking by intracellular magnesium","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

246704

PDB entries from 2025-12-24

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