SMTL ID : 3ifx.1 (1 other biounit)

Crystal structure of the Spin-labeled KcsA mutant V48R1

Coordinates

PDB Format Compare

Method

EPR 3.56 Å

Oligo State

homo-tetramer

Ligands

2 x K: POTASSIUM ION(Non-covalent)

K.1: 6 residues within 4Å: Chain A: T.75 Chain B: T.75 Chain C: T.75 Chain D: T.75 Ligands: K.3, TBA.4 4 PLIP interactions: 1 interactions with chain C, 1 interactions with chain D, 2 interactions with chain B Metal complexes: C:T.75, D:T.75, B:T.75, B:T.75 K.3: 9 residues within 4Å: Chain A: T.75, V.76 Chain B: T.75, V.76 Chain C: T.75, V.76 Chain D: T.75, V.76 Ligands: K.1 5 PLIP interactions: 1 interactions with chain C, 2 interactions with chain A, 1 interactions with chain D, 1 interactions with chain B Metal complexes: C:T.75, A:T.75, A:V.76, D:T.75, B:T.75

4 x MTN: S-[(1-oxyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)methyl] methanesulfonothioate(Non-covalent)

MTN.2: 2 residues within 4Å: Chain A: C.48, L.49 No protein-ligand interaction detected (PLIP) MTN.5: 6 residues within 4Å: Chain B: Y.45, C.48, R.52, I.60, T.61, Y.62 1 PLIP interactions: 1 interactions with chain B Hydrophobic interactions: B:Y.45 MTN.6: 3 residues within 4Å: Chain C: Y.45, C.48, L.49 No protein-ligand interaction detected (PLIP) MTN.7: 6 residues within 4Å: Chain D: C.48, L.49, R.52, I.60, T.61, Y.62 2 PLIP interactions: 2 interactions with chain D Hydrogen bonds: D:R.52 pi-Cation interactions: D:R.52

1 x TBA: TETRABUTYLAMMONIUM ION(Non-covalent)

TBA.4: 17 residues within 4Å: Chain A: T.74, T.75, I.100, F.103 Chain B: T.74, T.75, G.99, I.100, F.103 Chain C: T.74, T.75, I.100, F.103 Chain D: T.74, T.75, F.103 Ligands: K.1 9 PLIP interactions: 1 interactions with chain D, 3 interactions with chain C, 3 interactions with chain A, 2 interactions with chain B Hydrophobic interactions: D:F.103, C:T.75, C:I.100, C:F.103, A:T.75, A:I.100, A:F.103, B:T.75, B:F.103

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Cieslak, J.A. et al., Electron Spin-Echo Envelope Modulation (ESEEM) Reveals Water and Phosphate Interactions with the KcsA Potassium Channel. Biochemistry (2010)

Release Date

2010-02-09

Peptides

Voltage-gated potassium channel: ABCD

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

C
C

D
D

Membrane

We predict this structure to be a membrane protein.
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Voltage-gated potassium channel

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