SMTL ID : 7xnl.1

human KCNQ1-CaM-ML277-PIP2 complex in state A

Coordinates

PDB Format

Method

ELECTRON MICROSCOPY

Oligo State

hetero-4-4-mer

Ligands

4 x K: POTASSIUM ION(Non-covalent)

K.1: 9 residues within 4Å: Chain A: G.314, Y.315 Chain C: G.314, Y.315 Chain E: G.314, Y.315 Chain G: G.314, Y.315 Ligands: K.2 4 PLIP interactions: 1 interactions with chain C, 1 interactions with chain A, 1 interactions with chain E, 1 interactions with chain G Metal complexes: C:G.314, A:G.314, E:G.314, G:G.314 K.2: 10 residues within 4Å: Chain A: I.313, G.314 Chain C: I.313, G.314 Chain E: I.313, G.314 Chain G: I.313, G.314 Ligands: K.1, K.3 5 PLIP interactions: 2 interactions with chain C, 1 interactions with chain A, 2 interactions with chain E Metal complexes: C:I.313, C:G.314, A:G.314, E:I.313, E:G.314 K.3: 10 residues within 4Å: Chain A: T.312, I.313 Chain C: T.312, I.313 Chain E: T.312, I.313 Chain G: T.312, I.313 Ligands: K.2, K.4 5 PLIP interactions: 2 interactions with chain G, 1 interactions with chain E, 1 interactions with chain C, 1 interactions with chain A Metal complexes: G:T.312, G:I.313, E:I.313, C:I.313, A:I.313 K.4: 5 residues within 4Å: Chain A: T.312 Chain C: T.312 Chain E: T.312 Chain G: T.312 Ligands: K.3 4 PLIP interactions: 1 interactions with chain G, 1 interactions with chain C, 1 interactions with chain A, 1 interactions with chain E Metal complexes: G:T.312, C:T.312, A:T.312, E:T.312

4 x I0S: (2R)-N-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-1-(4-methylbenzene-1-sulfonyl)piperidine-2-carboxamide(Non-covalent)

I0S.5: 21 residues within 4Å: Chain A: I.268, L.271, G.272, F.275, F.332, V.334, F.335, A.336, S.338, F.339 Chain C: W.248, L.251, V.255, L.262, T.265, L.266, F.339, F.340, P.343, L.347 Ligands: PIO.8 4 PLIP interactions: 1 interactions with chain C, 3 interactions with chain A Hydrophobic interactions: C:L.262, A:F.275, A:F.335 Hydrogen bonds: A:F.335 I0S.7: 21 residues within 4Å: Chain C: I.268, L.271, G.272, F.275, F.332, V.334, F.335, A.336, S.338, F.339 Chain E: W.248, L.251, V.255, L.262, T.265, L.266, F.339, F.340, P.343, L.347 Ligands: PIO.12 4 PLIP interactions: 3 interactions with chain C, 1 interactions with chain E Hydrophobic interactions: C:F.275, C:F.335, E:L.262 Hydrogen bonds: C:F.335 I0S.9: 21 residues within 4Å: Chain E: I.268, L.271, G.272, F.275, F.332, V.334, F.335, A.336, S.338, F.339 Chain G: W.248, L.251, V.255, L.262, T.265, L.266, F.339, F.340, P.343, L.347 Ligands: PIO.10 5 PLIP interactions: 3 interactions with chain E, 2 interactions with chain G Hydrophobic interactions: E:F.275, E:F.335, G:L.262, G:P.343 Hydrogen bonds: E:F.335 I0S.11: 20 residues within 4Å: Chain A: W.248, L.251, V.255, L.262, T.265, L.266, F.339, F.340, P.343, L.347 Chain G: I.268, L.271, G.272, F.275, F.332, V.334, F.335, A.336, F.339 Ligands: PIO.6 4 PLIP interactions: 3 interactions with chain G, 1 interactions with chain A Hydrophobic interactions: G:F.275, G:F.335, A:L.262 Hydrogen bonds: G:F.335

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.6: 13 residues within 4Å: Chain A: R.181, K.183, Y.184, K.196, P.197, L.239, G.245, W.248, R.249, L.251, G.252 Chain B: R.91 Ligands: I0S.11 8 PLIP interactions: 7 interactions with chain A, 1 interactions with chain B Hydrophobic interactions: A:W.248 Hydrogen bonds: A:R.249 Salt bridges: A:R.181, A:K.183, A:K.183, A:K.196, A:K.196, B:R.91 PIO.8: 13 residues within 4Å: Chain C: R.181, K.183, Y.184, K.196, P.197, L.239, G.245, W.248, R.249, L.251, G.252 Chain D: R.91 Ligands: I0S.5 8 PLIP interactions: 7 interactions with chain C, 1 interactions with chain D Hydrophobic interactions: C:W.248 Hydrogen bonds: C:R.249 Salt bridges: C:R.181, C:K.183, C:K.183, C:K.196, C:K.196, D:R.91 PIO.10: 13 residues within 4Å: Chain F: R.91 Chain G: R.181, K.183, Y.184, K.196, P.197, L.239, G.245, W.248, R.249, L.251, G.252 Ligands: I0S.9 8 PLIP interactions: 7 interactions with chain G, 1 interactions with chain F Hydrophobic interactions: G:W.248 Hydrogen bonds: G:R.249 Salt bridges: G:R.181, G:K.183, G:K.183, G:K.196, G:K.196, F:R.91 PIO.12: 13 residues within 4Å: Chain E: R.181, K.183, Y.184, K.196, P.197, L.239, G.245, W.248, R.249, L.251, G.252 Chain H: R.91 Ligands: I0S.7 8 PLIP interactions: 7 interactions with chain E, 1 interactions with chain H Hydrophobic interactions: E:W.248 Hydrogen bonds: E:R.249 Salt bridges: E:R.181, E:K.183, E:K.183, E:K.196, E:K.196, H:R.91

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Ma, D. et al., Structural mechanisms for the activation of human cardiac KCNQ1 channel by electro-mechanical coupling enhancers. Proc.Natl.Acad.Sci.USA (2022)

Release Date

2022-12-14

Peptides

Potassium voltage-gated channel subfamily KQT member 1: ACEG
Calmodulin-3: BDFH

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

C
C

E
E

G
G

B
B

D
D

F
F

H
H

Membrane

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

Calmodulin-3

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