SMTL ID : 9vei.1

structure of human KCNQ1-KCNE1-CaM complex with PIP2

Coordinates

PDB Format Compare

Method

ELECTRON MICROSCOPY

Oligo State

hetero-4-4-4-mer

Ligands

8 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)

PT5.1: 11 residues within 4Å: Chain A: R.42, R.107, K.109, K.122, P.123, I.124, L.165, W.174, R.175 Chain C: E.72, H.73 18 PLIP interactions: 17 interactions with chain A, 1 interactions with chain C Hydrophobic interactions: A:P.123, A:I.124, A:L.165, A:W.174, A:W.174, A:W.174 Hydrogen bonds: A:R.42, A:K.122, A:K.122, C:H.73 Salt bridges: A:R.42, A:R.107, A:R.107, A:K.109, A:K.109, A:K.122, A:R.175, A:R.175 PT5.4: 11 residues within 4Å: Chain A: K.288, R.292 Chain C: F.56, G.60, S.64, R.67, S.68, K.69 Chain L: F.182, R.185, I.189 13 PLIP interactions: 8 interactions with chain C, 3 interactions with chain A, 2 interactions with chain L Hydrophobic interactions: C:F.56, L:F.182 Hydrogen bonds: C:S.64, C:R.67, C:R.67, C:S.68, C:S.68, C:K.69, A:R.292 Salt bridges: C:R.67, A:K.288, A:R.292, L:R.185 PT5.11: 11 residues within 4Å: Chain G: F.56, G.60, S.64, R.67, S.68, K.69 Chain K: F.182, R.185, I.189 Chain L: K.288, R.292 12 PLIP interactions: 3 interactions with chain L, 2 interactions with chain K, 7 interactions with chain G Hydrogen bonds: L:R.292, G:S.64, G:R.67, G:R.67, G:S.68, G:K.69 Salt bridges: L:K.288, L:R.292, K:R.185, G:R.67 Hydrophobic interactions: K:F.182, G:F.56 PT5.12: 11 residues within 4Å: Chain A: F.182, R.185, I.189 Chain H: F.56, G.60, S.64, R.67, S.68, K.69 Chain J: K.288, R.292 12 PLIP interactions: 3 interactions with chain J, 7 interactions with chain H, 2 interactions with chain A Hydrogen bonds: J:R.292, H:S.64, H:R.67, H:R.67, H:S.68, H:K.69 Salt bridges: J:K.288, J:R.292, H:R.67, A:R.185 Hydrophobic interactions: H:F.56, A:F.182 PT5.13: 11 residues within 4Å: Chain I: F.56, G.60, S.64, R.67, S.68, K.69 Chain J: F.182, R.185, I.189 Chain K: K.288, R.292 13 PLIP interactions: 2 interactions with chain J, 8 interactions with chain I, 3 interactions with chain K Hydrophobic interactions: J:F.182, I:F.56 Salt bridges: J:R.185, I:R.67, K:K.288, K:R.292 Hydrogen bonds: I:S.64, I:R.67, I:R.67, I:S.68, I:S.68, I:K.69, K:R.292 PT5.14: 11 residues within 4Å: Chain H: E.72, H.73 Chain J: R.42, R.107, K.109, K.122, P.123, I.124, L.165, W.174, R.175 18 PLIP interactions: 17 interactions with chain J, 1 interactions with chain H Hydrophobic interactions: J:P.123, J:I.124, J:L.165, J:W.174, J:W.174, J:W.174 Hydrogen bonds: J:R.42, J:K.122, J:K.122, H:H.73 Salt bridges: J:R.42, J:R.107, J:R.107, J:K.109, J:K.109, J:K.122, J:R.175, J:R.175 PT5.15: 11 residues within 4Å: Chain I: E.72, H.73 Chain K: R.42, R.107, K.109, K.122, P.123, I.124, L.165, W.174, R.175 18 PLIP interactions: 17 interactions with chain K, 1 interactions with chain I Hydrophobic interactions: K:P.123, K:I.124, K:L.165, K:W.174, K:W.174, K:W.174 Hydrogen bonds: K:R.42, K:K.122, K:K.122, I:H.73 Salt bridges: K:R.42, K:R.107, K:R.107, K:K.109, K:K.109, K:K.122, K:R.175, K:R.175 PT5.16: 11 residues within 4Å: Chain G: E.72, H.73 Chain L: R.42, R.107, K.109, K.122, P.123, I.124, L.165, W.174, R.175 18 PLIP interactions: 17 interactions with chain L, 1 interactions with chain G Hydrophobic interactions: L:P.123, L:I.124, L:L.165, L:W.174, L:W.174, L:W.174 Hydrogen bonds: L:R.42, L:K.122, L:K.122, G:H.73 Salt bridges: L:R.42, L:R.107, L:R.107, L:K.109, L:K.109, L:K.122, L:R.175, L:R.175

8 x CA: CALCIUM ION(Non-covalent)

CA.2: 3 residues within 4Å: Chain B: D.21, K.22, D.23 1 PLIP interactions: 1 interactions with chain B Metal complexes: B:D.21 CA.3: 4 residues within 4Å: Chain B: D.59, G.60, G.62, I.64 1 PLIP interactions: 1 interactions with chain B Metal complexes: B:G.60 CA.5: 3 residues within 4Å: Chain D: D.21, K.22, D.23 1 PLIP interactions: 1 interactions with chain D Metal complexes: D:D.21 CA.6: 4 residues within 4Å: Chain D: D.59, G.60, G.62, I.64 1 PLIP interactions: 1 interactions with chain D Metal complexes: D:G.60 CA.7: 3 residues within 4Å: Chain E: D.21, K.22, D.23 1 PLIP interactions: 1 interactions with chain E Metal complexes: E:D.21 CA.8: 4 residues within 4Å: Chain E: D.59, G.60, G.62, I.64 1 PLIP interactions: 1 interactions with chain E Metal complexes: E:G.60 CA.9: 3 residues within 4Å: Chain F: D.21, K.22, D.23 1 PLIP interactions: 1 interactions with chain F Metal complexes: F:D.21 CA.10: 4 residues within 4Å: Chain F: D.59, G.60, G.62, I.64 1 PLIP interactions: 1 interactions with chain F Metal complexes: F:G.60

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

Potassium voltage-gated channel subfamily KQT member 1: AJKL
Calmodulin-1: BDEF
Potassium voltage-gated channel subfamily E member 1: CGHI

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

J
D

K
G

L
J

B
B

D
E

E
H

F
K

C
C

G
L

H
F

I
I

Membrane

We predict this structure to be a membrane protein.
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Potassium voltage-gated channel subfamily KQT member 1

Calmodulin-1

Potassium voltage-gated channel subfamily E member 1

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