SMTL ID : 9ven.1

structure of human KCNQ1-CaM-PIP2 complex with bent conformation

Coordinates

PDB Format Compare

Method

ELECTRON MICROSCOPY

Oligo State

hetero-4-4-mer

Ligands

8 x CA: CALCIUM ION(Non-covalent)

CA.1: 3 residues within 4Å: Chain A: D.23, D.25, T.27 4 PLIP interactions: 4 interactions with chain A Metal complexes: A:D.23, A:D.23, A:D.25, A:D.25 CA.2: 4 residues within 4Å: Chain A: D.57, D.59, N.61, T.63 1 PLIP interactions: 1 interactions with chain A Metal complexes: A:T.63 CA.3: 3 residues within 4Å: Chain B: D.23, D.25, T.27 4 PLIP interactions: 4 interactions with chain B Metal complexes: B:D.23, B:D.23, B:D.25, B:D.25 CA.4: 4 residues within 4Å: Chain B: D.57, D.59, N.61, T.63 1 PLIP interactions: 1 interactions with chain B Metal complexes: B:T.63 CA.5: 3 residues within 4Å: Chain C: D.23, D.25, T.27 4 PLIP interactions: 4 interactions with chain C Metal complexes: C:D.23, C:D.23, C:D.25, C:D.25 CA.6: 4 residues within 4Å: Chain C: D.57, D.59, N.61, T.63 1 PLIP interactions: 1 interactions with chain C Metal complexes: C:T.63 CA.7: 3 residues within 4Å: Chain D: D.23, D.25, T.27 4 PLIP interactions: 4 interactions with chain D Metal complexes: D:D.23, D:D.23, D:D.25, D:D.25 CA.8: 4 residues within 4Å: Chain D: D.57, D.59, N.61, T.63 1 PLIP interactions: 1 interactions with chain D Metal complexes: D:T.63

4 x PT5: [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phospho ryl]oxy-propan-2-yl] (8Z)-icosa-5,8,11,14-tetraenoate(Non-covalent)

PT5.9: 9 residues within 4Å: Chain A: R.91 Chain E: R.107, K.109, Y.110, K.122, P.123, W.174, R.175, G.178 9 PLIP interactions: 8 interactions with chain E, 1 interactions with chain A Hydrophobic interactions: E:W.174 Hydrogen bonds: E:Y.110, E:K.122 Salt bridges: E:R.107, E:K.109, E:K.109, E:R.175, E:R.175, A:R.91 PT5.10: 9 residues within 4Å: Chain B: R.91 Chain F: R.107, K.109, Y.110, K.122, P.123, W.174, R.175, G.178 9 PLIP interactions: 8 interactions with chain F, 1 interactions with chain B Hydrophobic interactions: F:W.174 Hydrogen bonds: F:Y.110, F:K.122 Salt bridges: F:R.107, F:K.109, F:K.109, F:R.175, F:R.175, B:R.91 PT5.11: 9 residues within 4Å: Chain D: R.91 Chain G: R.107, K.109, Y.110, K.122, P.123, W.174, R.175, G.178 9 PLIP interactions: 8 interactions with chain G, 1 interactions with chain D Hydrophobic interactions: G:W.174 Hydrogen bonds: G:Y.110, G:K.122 Salt bridges: G:R.107, G:K.109, G:K.109, G:R.175, G:R.175, D:R.91 PT5.12: 9 residues within 4Å: Chain C: R.91 Chain H: R.107, K.109, Y.110, K.122, P.123, W.174, R.175, G.178 9 PLIP interactions: 8 interactions with chain H, 1 interactions with chain C Hydrophobic interactions: H:W.174 Hydrogen bonds: H:Y.110, H:K.122 Salt bridges: H:R.107, H:K.109, H:K.109, H:R.175, H:R.175, C:R.91

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Cui, C. et al., Mechanisms of KCNQ1 gating modulation by KCNE1/3 for cell-specific function. Cell Res. (2025)

Release Date

2025-08-20

Peptides

Calmodulin-1: ABCD
Potassium voltage-gated channel subfamily KQT member 1: EFGH

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
B

B
D

C
F

D
H

E
A

F
C

G
G

H
E

Membrane

We predict this structure to be a membrane protein.
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Calmodulin-1

Potassium voltage-gated channel subfamily KQT member 1

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