SMTL ID : 9ydz.1

Cryo EM structure of KCa3.1_R355K_II/calmodulin channel in complex with rimtuzalcap

Coordinates

PDB Format Compare

Method

ELECTRON MICROSCOPY 3.40 Å

Oligo State

hetero-4-4-mer

Ligands

4 x K: POTASSIUM ION(Non-covalent)

K.1: 5 residues within 4Å: Chain A: T.242 Chain B: T.242 Chain C: T.242 Chain D: T.242 Ligands: K.2 4 PLIP interactions: 1 interactions with chain A, 1 interactions with chain C, 1 interactions with chain D, 1 interactions with chain B Metal complexes: A:T.242, C:T.242, D:T.242, B:T.242 K.2: 6 residues within 4Å: Chain A: T.242 Chain B: T.242 Chain C: T.242 Chain D: T.242 Ligands: K.1, K.3 4 PLIP interactions: 1 interactions with chain A, 1 interactions with chain C, 1 interactions with chain D, 1 interactions with chain B Metal complexes: A:T.242, C:T.242, D:T.242, B:T.242 K.3: 6 residues within 4Å: Chain A: G.244 Chain B: G.244 Chain C: G.244 Chain D: G.244 Ligands: K.2, K.4 4 PLIP interactions: 1 interactions with chain D, 1 interactions with chain C, 1 interactions with chain A, 1 interactions with chain B Metal complexes: D:G.244, C:G.244, A:G.244, B:G.244 K.4: 9 residues within 4Å: Chain A: G.244, Y.245 Chain B: G.244, Y.245 Chain C: G.244, Y.245 Chain D: G.244, Y.245 Ligands: K.3 4 PLIP interactions: 1 interactions with chain C, 1 interactions with chain A, 1 interactions with chain B, 1 interactions with chain D Metal complexes: C:Y.245, A:Y.245, B:Y.245, D:Y.245

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Nam, Y.W. et al., Structural basis for the subtype-selectivity of KCa2.2 channel activators. To Be Published

Release Date

2025-10-01

Peptides

Intermediate conductance calcium-activated potassium channel protein 4: ABCD
Calmodulin-1: EFGH

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

C
C

D
D

E
E

F
F

G
G

H
H

Membrane

We predict this structure to be a membrane protein.
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Intermediate conductance calcium-activated potassium channel protein 4

Calmodulin-1