SMTL ID : 2hjf.1

Potassium channel kcsa-fab complex with tetrabutylammonium (TBA)

Coordinates

PDB Format

Method

X-RAY DIFFRACTION 2.90 Å

Oligo State

hetero-4-4-4-mer

Ligands

16 x K: POTASSIUM ION(Non-covalent)

K.1: 15 residues within 4Å: Chain C: G.56, Y.57 Chain F: G.56, Y.57 Chain I: G.56, Y.57 Chain L: G.56, Y.57 Ligands: K.2, K.6, K.7, K.11, K.12, K.16, K.17 Ligand excluded by PLIP K.2: 19 residues within 4Å: Chain C: V.55, G.56 Chain F: V.55, G.56 Chain I: V.55, G.56 Chain L: V.55, G.56 Ligands: K.1, K.3, K.6, K.7, K.8, K.11, K.12, K.13, K.16, K.17, K.18 Ligand excluded by PLIP K.3: 19 residues within 4Å: Chain C: T.54, V.55 Chain F: T.54, V.55 Chain I: T.54, V.55 Chain L: T.54, V.55 Ligands: K.2, K.4, K.7, K.8, K.9, K.12, K.13, K.14, K.17, K.18, K.19 Ligand excluded by PLIP K.4: 11 residues within 4Å: Chain C: T.54 Chain F: T.54 Chain I: T.54 Chain L: T.54 Ligands: K.3, K.8, K.9, K.13, K.14, K.18, K.19 Ligand excluded by PLIP K.6: 15 residues within 4Å: Chain C: G.56, Y.57 Chain F: G.56, Y.57 Chain I: G.56, Y.57 Chain L: G.56, Y.57 Ligands: K.1, K.2, K.7, K.11, K.12, K.16, K.17 Ligand excluded by PLIP K.7: 19 residues within 4Å: Chain C: V.55, G.56 Chain F: V.55, G.56 Chain I: V.55, G.56 Chain L: V.55, G.56 Ligands: K.1, K.2, K.3, K.6, K.8, K.11, K.12, K.13, K.16, K.17, K.18 Ligand excluded by PLIP K.8: 19 residues within 4Å: Chain C: T.54, V.55 Chain F: T.54, V.55 Chain I: T.54, V.55 Chain L: T.54, V.55 Ligands: K.2, K.3, K.4, K.7, K.9, K.12, K.13, K.14, K.17, K.18, K.19 Ligand excluded by PLIP K.9: 11 residues within 4Å: Chain C: T.54 Chain F: T.54 Chain I: T.54 Chain L: T.54 Ligands: K.3, K.4, K.8, K.13, K.14, K.18, K.19 Ligand excluded by PLIP K.11: 15 residues within 4Å: Chain C: G.56, Y.57 Chain F: G.56, Y.57 Chain I: G.56, Y.57 Chain L: G.56, Y.57 Ligands: K.1, K.2, K.6, K.7, K.12, K.16, K.17 Ligand excluded by PLIP K.12: 19 residues within 4Å: Chain C: V.55, G.56 Chain F: V.55, G.56 Chain I: V.55, G.56 Chain L: V.55, G.56 Ligands: K.1, K.2, K.3, K.6, K.7, K.8, K.11, K.13, K.16, K.17, K.18 Ligand excluded by PLIP K.13: 19 residues within 4Å: Chain C: T.54, V.55 Chain F: T.54, V.55 Chain I: T.54, V.55 Chain L: T.54, V.55 Ligands: K.2, K.3, K.4, K.7, K.8, K.9, K.12, K.14, K.17, K.18, K.19 Ligand excluded by PLIP K.14: 11 residues within 4Å: Chain C: T.54 Chain F: T.54 Chain I: T.54 Chain L: T.54 Ligands: K.3, K.4, K.8, K.9, K.13, K.18, K.19 Ligand excluded by PLIP K.16: 15 residues within 4Å: Chain C: G.56, Y.57 Chain F: G.56, Y.57 Chain I: G.56, Y.57 Chain L: G.56, Y.57 Ligands: K.1, K.2, K.6, K.7, K.11, K.12, K.17 Ligand excluded by PLIP K.17: 19 residues within 4Å: Chain C: V.55, G.56 Chain F: V.55, G.56 Chain I: V.55, G.56 Chain L: V.55, G.56 Ligands: K.1, K.2, K.3, K.6, K.7, K.8, K.11, K.12, K.13, K.16, K.18 Ligand excluded by PLIP K.18: 19 residues within 4Å: Chain C: T.54, V.55 Chain F: T.54, V.55 Chain I: T.54, V.55 Chain L: T.54, V.55 Ligands: K.2, K.3, K.4, K.7, K.8, K.9, K.12, K.13, K.14, K.17, K.19 Ligand excluded by PLIP K.19: 11 residues within 4Å: Chain C: T.54 Chain F: T.54 Chain I: T.54 Chain L: T.54 Ligands: K.3, K.4, K.8, K.9, K.13, K.14, K.18 Ligand excluded by PLIP

4 x TBA: TETRABUTYLAMMONIUM ION(Non-covalent)

TBA.5: 21 residues within 4Å: Chain C: A.52, T.53, T.54, I.79, F.82 Chain F: A.52, T.54, I.79, F.82 Chain I: A.52, T.54, I.79, F.82 Chain L: A.52, T.54, G.78, I.79, F.82 Ligands: TBA.10, TBA.15, TBA.20 11 PLIP interactions: 3 interactions with chain F, 3 interactions with chain L, 3 interactions with chain C, 2 interactions with chain I Hydrophobic interactions: F:T.54, F:I.79, F:F.82, L:T.54, L:I.79, L:F.82, C:T.54, C:I.79, C:F.82, I:T.54, I:F.82 TBA.10: 21 residues within 4Å: Chain C: A.52, T.54, I.79, F.82 Chain F: A.52, T.53, T.54, I.79, F.82 Chain I: A.52, T.54, G.78, I.79, F.82 Chain L: A.52, T.54, I.79, F.82 Ligands: TBA.5, TBA.15, TBA.20 11 PLIP interactions: 3 interactions with chain I, 3 interactions with chain F, 3 interactions with chain C, 2 interactions with chain L Hydrophobic interactions: I:T.54, I:I.79, I:F.82, F:T.54, F:I.79, F:F.82, C:T.54, C:I.79, C:F.82, L:T.54, L:F.82 TBA.15: 21 residues within 4Å: Chain C: A.52, T.54, G.78, I.79, F.82 Chain F: A.52, T.54, I.79, F.82 Chain I: A.52, T.53, T.54, I.79, F.82 Chain L: A.52, T.54, I.79, F.82 Ligands: TBA.5, TBA.10, TBA.20 11 PLIP interactions: 3 interactions with chain I, 2 interactions with chain F, 3 interactions with chain L, 3 interactions with chain C Hydrophobic interactions: I:T.54, I:I.79, I:F.82, F:T.54, F:F.82, L:T.54, L:I.79, L:F.82, C:T.54, C:I.79, C:F.82 TBA.20: 21 residues within 4Å: Chain C: A.52, T.54, I.79, F.82 Chain F: A.52, T.54, G.78, I.79, F.82 Chain I: A.52, T.54, I.79, F.82 Chain L: A.52, T.53, T.54, I.79, F.82 Ligands: TBA.5, TBA.10, TBA.15 11 PLIP interactions: 3 interactions with chain I, 3 interactions with chain F, 3 interactions with chain L, 2 interactions with chain C Hydrophobic interactions: I:T.54, I:I.79, I:F.82, F:T.54, F:I.79, F:F.82, L:T.54, L:I.79, L:F.82, C:T.54, C:F.82

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Faraldo-Gomez, J.D. et al., Mechanism of Intracellular Block of the KcsA K(+) Channel by Tetrabutylammonium: Insights from X-ray Crystallography, Electrophysiology and Replica-exchange Molecular Dynamics Simulations. J.Mol.Biol. (2007)

Release Date

2006-12-05

Peptides

Antibody fragment Heavy chain: ADGJ
Antibody fragment Light chain: BEHK
Voltage-gated potassium channel: CFIL

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

D
A

G
A

J
A

B
B

E
B

H
B

K
B

C
C

F
C

I
C

L
C

Membrane

We predict this structure to be a membrane protein.
Show / Hide

Antibody fragment Heavy chain

Antibody fragment Light chain

Voltage-gated potassium channel

Related Entries With Identical Sequence