SMTL ID : 3sjq.1

Crystal structure of a small conductance potassium channel splice variant complexed with calcium-calmodulin

Coordinates

PDB Format

Method

X-RAY DIFFRACTION 1.90 Å

Oligo State

hetero-oligomer

Ligands

8 x CA: CALCIUM ION(Non-covalent)

CA.1: 5 residues within 4Å: Chain A: D.21, D.23, D.25, T.27, E.32 5 PLIP interactions: 4 interactions with chain A, 1 Ligand-Water interactions Metal complexes: A:D.21, A:D.25, A:T.27, A:E.32, H2O.1 CA.2: 5 residues within 4Å: Chain A: D.57, D.59, N.61, T.63, E.68 5 PLIP interactions: 4 interactions with chain A, 1 Ligand-Water interactions Metal complexes: A:D.57, A:D.59, A:T.63, A:E.68, H2O.2 CA.3: 5 residues within 4Å: Chain A: D.94, D.96, N.98, Y.100, E.105 5 PLIP interactions: 4 interactions with chain A, 1 Ligand-Water interactions Metal complexes: A:D.94, A:D.96, A:Y.100, A:E.105, H2O.3 CA.4: 5 residues within 4Å: Chain A: D.130, D.132, D.134, Q.136, E.141 5 PLIP interactions: 4 interactions with chain A, 1 Ligand-Water interactions Metal complexes: A:D.130, A:Q.136, A:E.141, A:E.141, H2O.4 CA.12: 5 residues within 4Å: Chain B: D.21, D.23, D.25, T.27, E.32 5 PLIP interactions: 4 interactions with chain B, 1 Ligand-Water interactions Metal complexes: B:D.21, B:D.25, B:T.27, B:E.32, H2O.136 CA.13: 5 residues within 4Å: Chain B: D.57, D.59, N.61, T.63, E.68 5 PLIP interactions: 4 interactions with chain B, 1 Ligand-Water interactions Metal complexes: B:D.57, B:D.59, B:T.63, B:E.68, H2O.140 CA.14: 5 residues within 4Å: Chain B: D.94, D.96, N.98, Y.100, E.105 5 PLIP interactions: 4 interactions with chain B, 1 Ligand-Water interactions Metal complexes: B:D.94, B:D.96, B:Y.100, B:E.105, H2O.142 CA.15: 5 residues within 4Å: Chain B: D.130, D.132, D.134, Q.136, E.141 5 PLIP interactions: 4 interactions with chain B, 1 Ligand-Water interactions Metal complexes: B:D.130, B:Q.136, B:E.141, B:E.141, H2O.143

4 x PHU: 1-PHENYLUREA(Non-covalent)

PHU.5: 9 residues within 4Å: Chain A: F.20, M.52, E.55, V.56, I.64, F.69, M.72 Chain C: A.69, L.72 8 PLIP interactions: 7 interactions with chain A, 1 interactions with chain C Hydrophobic interactions: A:F.20, A:F.20, A:I.64, A:F.69, A:F.69, C:L.72 Hydrogen bonds: A:M.52, A:E.55 PHU.16: 9 residues within 4Å: Chain B: F.20, M.52, E.55, V.56, I.64, F.69, M.72 Chain D: A.69, L.72 7 PLIP interactions: 6 interactions with chain B, 1 interactions with chain D Hydrophobic interactions: B:F.20, B:I.64, B:F.69, D:L.72 Hydrogen bonds: B:M.52, B:E.55, B:E.55 PHU.22: 4 residues within 4Å: Chain A: L.40 Chain C: T.71, D.74, L.75 2 PLIP interactions: 2 interactions with chain C Hydrophobic interactions: C:D.74, C:L.75 PHU.26: 3 residues within 4Å: Chain D: T.71, D.74, L.75 2 PLIP interactions: 2 interactions with chain D Hydrophobic interactions: D:D.74, D:L.75

6 x GOL: GLYCEROL(Non-functional Binders)

GOL.6: 2 residues within 4Å: Chain A: N.98, Y.100 4 PLIP interactions: 4 interactions with chain A Water bridges: A:N.98, A:N.138, A:N.138, A:Y.139 GOL.7: 5 residues within 4Å: Chain A: L.19, K.22, V.36, S.39 Chain C: L.75 5 PLIP interactions: 5 interactions with chain A Hydrogen bonds: A:K.22, A:S.39, A:S.39 Water bridges: A:S.18, A:L.19 GOL.8: 1 residues within 4Å: Chain A: K.22 3 PLIP interactions: 3 interactions with chain A Water bridges: A:K.22, A:G.24, A:G.24 GOL.9: 1 residues within 4Å: Chain A: D.65 4 PLIP interactions: 4 interactions with chain A Hydrogen bonds: A:D.59, A:D.65 Water bridges: A:N.61, A:N.61 GOL.17: 5 residues within 4Å: Chain B: L.19, K.22, V.36, S.39, L.40 4 PLIP interactions: 4 interactions with chain B Hydrogen bonds: B:L.19, B:K.22, B:S.39, B:S.39 GOL.23: 5 residues within 4Å: Chain D: K.25, N.26, K.37, K.40, H.41 5 PLIP interactions: 5 interactions with chain D Hydrogen bonds: D:K.25, D:K.25, D:N.26, D:K.40, D:K.40

8 x SO4: SULFATE ION(Non-functional Binders)

SO4.10: 2 residues within 4Å: Chain A: T.35, R.38 2 PLIP interactions: 2 interactions with chain A Water bridges: A:T.35 Salt bridges: A:R.38 SO4.11: 3 residues within 4Å: Chain A: R.107, H.108, T.111 4 PLIP interactions: 4 interactions with chain A Hydrogen bonds: A:T.111 Water bridges: A:R.107 Salt bridges: A:R.107, A:H.108 SO4.18: 2 residues within 4Å: Chain B: T.35, R.38 1 PLIP interactions: 1 interactions with chain B Salt bridges: B:R.38 SO4.19: 2 residues within 4Å: Chain B: A.103, R.107 3 PLIP interactions: 3 interactions with chain B Water bridges: B:A.104, B:A.104 Salt bridges: B:R.107 SO4.20: 3 residues within 4Å: Chain B: E.124, R.127 Chain C: R.56 3 PLIP interactions: 1 interactions with chain B, 2 interactions with chain C Salt bridges: B:R.127, C:R.56, C:K.59 SO4.21: 5 residues within 4Å: Chain C: L.22, K.25, N.26, K.37, H.41 4 PLIP interactions: 4 interactions with chain C Hydrogen bonds: C:N.26 Salt bridges: C:K.25, C:K.37, C:H.41 SO4.24: 2 residues within 4Å: Chain D: H.35, R.39 3 PLIP interactions: 3 interactions with chain D Water bridges: D:H.35, D:H.35 Salt bridges: D:R.39 SO4.25: 3 residues within 4Å: Chain A: R.127 Chain D: R.56, K.59 3 PLIP interactions: 2 interactions with chain D, 1 interactions with chain A Salt bridges: D:R.56, D:K.59, A:R.127

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Zhang, M. et al., Structural basis for calmodulin as a dynamic calcium sensor. Structure (2012)

Release Date

2012-05-30

Peptides

Calmodulin: AB
Small conductance calcium-activated potassium channel protein 2: CD

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

C
C

D
D

Calmodulin

Small conductance calcium-activated potassium channel protein 2

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