SMTL ID : 9wd8.1

structure of human KCNQ1-KCNE3-CaM complex with two PIP2

Coordinates

PDB Format Compare

Method

ELECTRON MICROSCOPY

Oligo State

hetero-4-4-4-mer

Ligands

8 x CA: CALCIUM ION(Non-covalent)

CA.1: 2 residues within 4Å: Chain A: T.27, T.63 No protein-ligand interaction detected (PLIP) CA.2: 5 residues within 4Å: Chain A: D.59, G.60, N.61, G.62, I.64 No protein-ligand interaction detected (PLIP) CA.4: 2 residues within 4Å: Chain C: T.27, T.63 No protein-ligand interaction detected (PLIP) CA.5: 5 residues within 4Å: Chain C: D.59, G.60, N.61, G.62, I.64 No protein-ligand interaction detected (PLIP) CA.6: 2 residues within 4Å: Chain D: T.27, T.63 No protein-ligand interaction detected (PLIP) CA.7: 5 residues within 4Å: Chain D: D.59, G.60, N.61, G.62, I.64 No protein-ligand interaction detected (PLIP) CA.8: 2 residues within 4Å: Chain E: T.27, T.63 No protein-ligand interaction detected (PLIP) CA.9: 5 residues within 4Å: Chain E: D.59, G.60, N.61, G.62, I.64 No protein-ligand interaction detected (PLIP)

8 x 01: (2R)-3-{[(S)-hydroxy{[(1R,2R,3S,4R,5R,6S)-2,3,6-trihydroxy-4,5-bis(phosphonooxy)cyclohexyl]oxy}phosphoryl]oxy}propane-1,2-diyl di[(9Z)-octadec-9-enoate]

01.3: 12 residues within 4Å: Chain B: V.70, T.71, G.73, S.74, L.77, R.81, R.83 Chain I: V.181, F.182, R.185, I.189, L.192 11 PLIP interactions: 8 interactions with chain B, 3 interactions with chain I Hydrophobic interactions: B:V.70, B:T.71, B:L.77, I:V.181, I:L.192 Hydrogen bonds: B:S.74, B:R.81 Salt bridges: B:R.81, B:R.81, B:R.83, I:R.185 01.10: 13 residues within 4Å: Chain B: K.87 Chain F: Y.37, R.42, R.107, K.109, R.121, K.122, P.123, I.127, L.165, Q.170, G.171, W.174 11 PLIP interactions: 11 interactions with chain F Hydrophobic interactions: F:P.123, F:I.127, F:W.174 Hydrogen bonds: F:Y.37, F:Q.170 Salt bridges: F:R.42, F:R.107, F:R.107, F:R.121, F:K.122, F:R.175 01.11: 13 residues within 4Å: Chain G: Y.37, R.42, R.107, K.109, R.121, K.122, P.123, I.127, L.165, Q.170, G.171, W.174 Chain J: K.87 11 PLIP interactions: 11 interactions with chain G Hydrophobic interactions: G:P.123, G:I.127, G:W.174 Hydrogen bonds: G:Y.37, G:Q.170 Salt bridges: G:R.42, G:R.107, G:R.107, G:R.121, G:K.122, G:R.175 01.12: 13 residues within 4Å: Chain H: Y.37, R.42, R.107, K.109, R.121, K.122, P.123, I.127, L.165, Q.170, G.171, W.174 Chain K: K.87 11 PLIP interactions: 11 interactions with chain H Hydrophobic interactions: H:P.123, H:I.127, H:W.174 Hydrogen bonds: H:Y.37, H:Q.170 Salt bridges: H:R.42, H:R.107, H:R.107, H:R.121, H:K.122, H:R.175 01.13: 13 residues within 4Å: Chain I: Y.37, R.42, R.107, K.109, R.121, K.122, P.123, I.127, L.165, Q.170, G.171, W.174 Chain L: K.87 11 PLIP interactions: 11 interactions with chain I Hydrophobic interactions: I:P.123, I:I.127, I:W.174 Hydrogen bonds: I:Y.37, I:Q.170 Salt bridges: I:R.42, I:R.107, I:R.107, I:R.121, I:K.122, I:R.175 01.14: 12 residues within 4Å: Chain F: V.181, F.182, R.185, I.189, L.192 Chain J: V.70, T.71, G.73, S.74, L.77, R.81, R.83 11 PLIP interactions: 8 interactions with chain J, 3 interactions with chain F Hydrophobic interactions: J:V.70, J:T.71, J:L.77, F:V.181, F:L.192 Hydrogen bonds: J:S.74, J:R.81 Salt bridges: J:R.81, J:R.81, J:R.83, F:R.185 01.15: 12 residues within 4Å: Chain G: V.181, F.182, R.185, I.189, L.192 Chain K: V.70, T.71, G.73, S.74, L.77, R.81, R.83 11 PLIP interactions: 8 interactions with chain K, 3 interactions with chain G Hydrophobic interactions: K:V.70, K:T.71, K:L.77, G:V.181, G:L.192 Hydrogen bonds: K:S.74, K:R.81 Salt bridges: K:R.81, K:R.81, K:R.83, G:R.185 01.16: 12 residues within 4Å: Chain H: V.181, F.182, R.185, I.189, L.192 Chain L: V.70, T.71, G.73, S.74, L.77, R.81, R.83 11 PLIP interactions: 8 interactions with chain L, 3 interactions with chain H Hydrophobic interactions: L:V.70, L:T.71, L:L.77, H:V.181, H:L.192 Hydrogen bonds: L:S.74, L:R.81 Salt bridges: L:R.81, L:R.81, L:R.83, H:R.185

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

2025-09-03

Peptides

Calmodulin-1: ACDE
Potassium voltage-gated channel subfamily E member 3: BJKL
Potassium voltage-gated channel subfamily KQT member 1: FGHI

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
B

C
E

D
H

E
K

B
C

J
F

K
I

L
L

F
A

G
D

H
G

I
J

Membrane

We predict this structure to be a membrane protein.
Show / Hide

Calmodulin-1

Potassium voltage-gated channel subfamily E member 3

Potassium voltage-gated channel subfamily KQT member 1

Related Entries With Identical Sequence