SMTL ID : 6xit.1

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

Coordinates

PDB Format Compare

Method

ELECTRON MICROSCOPY

Oligo State

homo-tetramer

Ligands

4 x PIO: [(2R)-2-octanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propyl] octanoate(Non-covalent)

PIO.1: 6 residues within 4Å: Chain A: K.15, K.41, W.42, R.43, K.150, K.151 10 PLIP interactions: 10 interactions with chain A Hydrophobic interactions: A:W.42 Hydrogen bonds: A:W.42, A:R.43 Salt bridges: A:K.15, A:K.41, A:K.41, A:K.145, A:K.150, A:K.150, A:K.151 PIO.5: 9 residues within 4Å: Chain B: K.15, L.40, K.41, W.42, R.43, K.145, Q.148, K.150, K.151 11 PLIP interactions: 11 interactions with chain B Hydrophobic interactions: B:W.42 Hydrogen bonds: B:W.42, B:R.43, B:Q.148 Salt bridges: B:K.15, B:K.41, B:K.41, B:K.145, B:K.150, B:K.150, B:K.151 PIO.6: 9 residues within 4Å: Chain C: K.15, L.40, K.41, W.42, R.43, K.145, Q.148, K.150, K.151 12 PLIP interactions: 12 interactions with chain C Hydrophobic interactions: C:W.42 Hydrogen bonds: C:W.42, C:R.43, C:Q.148 Salt bridges: C:K.15, C:K.41, C:K.41, C:K.41, C:K.145, C:K.150, C:K.150, C:K.151 PIO.7: 10 residues within 4Å: Chain D: K.15, L.40, K.41, W.42, R.43, F.44, K.145, Q.148, K.150, K.151 14 PLIP interactions: 14 interactions with chain D Hydrophobic interactions: D:W.42 Hydrogen bonds: D:K.41, D:W.42, D:W.42, D:R.43, D:Q.148, D:Q.148, D:K.151 Salt bridges: D:K.15, D:K.41, D:K.145, D:K.150, D:K.150, D:K.151

3 x K: POTASSIUM ION(Non-covalent)

K.2: 8 residues within 4Å: Chain A: G.107, Y.108 Chain B: G.107, Y.108 Chain C: G.107, Y.108 Chain D: G.107, Y.108 4 PLIP interactions: 1 interactions with chain A, 1 interactions with chain B, 1 interactions with chain D, 1 interactions with chain C Metal complexes: A:G.107, B:G.107, D:G.107, C:G.107 K.3: 9 residues within 4Å: Chain A: T.105, I.106 Chain B: T.105, I.106 Chain C: T.105, I.106 Chain D: T.105, I.106 Ligands: K.4 4 PLIP interactions: 1 interactions with chain A, 1 interactions with chain C, 1 interactions with chain D, 1 interactions with chain B Metal complexes: A:I.106, C:I.106, D:I.106, B:I.106 K.4: 9 residues within 4Å: Chain A: T.105, I.106 Chain B: T.105, I.106 Chain C: T.105, I.106 Chain D: T.105, I.106 Ligands: K.3 4 PLIP interactions: 1 interactions with chain D, 1 interactions with chain B, 1 interactions with chain C, 1 interactions with chain A Metal complexes: D:T.105, B:T.105, C:T.105, A:T.105

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Niu, Y. et al., Cryo-EM analysis of PIP 2 regulation in mammalian GIRK channels. Elife (2020)

Release Date

2020-10-07

Peptides

G protein-activated inward rectifier potassium channel 2: ABCD

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

C
C

D
D

Membrane

We predict this structure to be a membrane protein.
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G protein-activated inward rectifier potassium channel 2

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