SMTL ID : 9uc8.1

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 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: R.181, K.183, Y.184, K.196, W.248, R.249 8 PLIP interactions: 8 interactions with chain A Hydrophobic interactions: A:W.248, A:W.248, A:R.249 Hydrogen bonds: A:R.181 Salt bridges: A:K.183, A:K.183, A:K.196, A:R.249 PIO.5: 8 residues within 4Å: Chain A: K.362 Chain C: G.22, L.25, S.26, I.28, R.29 Chain J: R.259, I.263 8 PLIP interactions: 3 interactions with chain C, 3 interactions with chain J, 2 interactions with chain A Hydrogen bonds: C:I.28, C:R.29, J:R.259 Salt bridges: C:R.29, J:R.259, A:K.362, A:K.362 Hydrophobic interactions: J:I.263 PIO.6: 6 residues within 4Å: Chain D: R.181, K.183, Y.184, K.196, W.248, R.249 8 PLIP interactions: 8 interactions with chain D Hydrophobic interactions: D:W.248, D:W.248, D:R.249 Salt bridges: D:R.181, D:K.183, D:K.183, D:K.196, D:R.249 PIO.7: 8 residues within 4Å: Chain A: R.259, I.263 Chain D: K.362 Chain F: G.22, L.25, S.26, I.28, R.29 8 PLIP interactions: 2 interactions with chain D, 3 interactions with chain F, 3 interactions with chain A Salt bridges: D:K.362, D:K.362, F:R.29, A:R.259 Hydrogen bonds: F:I.28, F:R.29, A:R.259 Hydrophobic interactions: A:I.263 PIO.8: 6 residues within 4Å: Chain G: R.181, K.183, Y.184, K.196, W.248, R.249 8 PLIP interactions: 8 interactions with chain G Hydrophobic interactions: G:W.248, G:W.248, G:R.249 Salt bridges: G:R.181, G:K.183, G:K.183, G:K.196, G:R.249 PIO.9: 7 residues within 4Å: Chain D: R.259, I.263 Chain G: K.362 Chain I: G.22, L.25, S.26, R.29 8 PLIP interactions: 3 interactions with chain I, 3 interactions with chain D, 2 interactions with chain G Hydrogen bonds: I:I.28, I:R.29, D:R.259 Salt bridges: I:R.29, D:R.259, G:K.362, G:K.362 Hydrophobic interactions: D:I.263 PIO.10: 6 residues within 4Å: Chain J: R.181, K.183, Y.184, K.196, W.248, R.249 8 PLIP interactions: 8 interactions with chain J Hydrophobic interactions: J:W.248, J:W.248, J:R.249 Salt bridges: J:R.181, J:K.183, J:K.183, J:K.196, J:R.249 PIO.11: 7 residues within 4Å: Chain G: R.259, I.263 Chain J: K.362 Chain L: G.22, L.25, S.26, R.29 8 PLIP interactions: 3 interactions with chain G, 3 interactions with chain L, 2 interactions with chain J Hydrophobic interactions: G:I.263 Hydrogen bonds: G:R.259, L:I.28, L:R.29 Salt bridges: G:R.259, L:R.29, J:K.362, J:K.362

3 x K: POTASSIUM ION(Non-covalent)

K.2: 8 residues within 4Å: Chain A: G.314, Y.315 Chain D: G.314, Y.315 Chain G: G.314, Y.315 Chain J: G.314, Y.315 4 PLIP interactions: 1 interactions with chain D, 1 interactions with chain G, 1 interactions with chain A, 1 interactions with chain J Metal complexes: D:Y.315, G:Y.315, A:Y.315, J:Y.315 K.3: 8 residues within 4Å: Chain A: T.312, I.313 Chain D: T.312, I.313 Chain G: T.312, I.313 Chain J: T.312, I.313 No protein-ligand interaction detected (PLIP) K.4: 4 residues within 4Å: Chain A: T.312 Chain D: T.312 Chain G: T.312 Chain J: T.312 No protein-ligand interaction detected (PLIP)

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Zhong, L. et al., Secondary structure transitions and dual PIP2 binding define cardiac KCNQ1-KCNE1 channel gating. Cell Res. (2025)

Release Date

2025-11-05

Peptides

Potassium voltage-gated channel subfamily KQT member 1: ADGJ
Calmodulin-1: BEHK
Potassium voltage-gated channel subfamily E member 1: CFIL

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

D
D

G
G

J
J

B
B

E
E

H
H

K
K

C
C

F
F

I
I

L
L

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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