SMTL ID : 3iga.1

Potassium Channel KcsA-Fab complex in Li+ and K+

Coordinates

PDB Format

Method

X-RAY DIFFRACTION 2.75 Å

Oligo State

hetero-4-4-4-mer

Ligands

4 x NI: NICKEL (II) ION(Non-covalent)

NI.1: 7 residues within 4Å: Chain C: H.124 Chain F: H.124 Chain I: H.124 Chain L: H.124 Ligands: NI.3, NI.5, NI.7 4 PLIP interactions: 1 interactions with chain I, 1 interactions with chain F, 1 interactions with chain C, 1 interactions with chain L Metal complexes: I:H.124, F:H.124, C:H.124, L:H.124 NI.3: 7 residues within 4Å: Chain C: H.124 Chain F: H.124 Chain I: H.124 Chain L: H.124 Ligands: NI.1, NI.5, NI.7 4 PLIP interactions: 1 interactions with chain I, 1 interactions with chain F, 1 interactions with chain C, 1 interactions with chain L Metal complexes: I:H.124, F:H.124, C:H.124, L:H.124 NI.5: 7 residues within 4Å: Chain C: H.124 Chain F: H.124 Chain I: H.124 Chain L: H.124 Ligands: NI.1, NI.3, NI.7 4 PLIP interactions: 1 interactions with chain I, 1 interactions with chain F, 1 interactions with chain C, 1 interactions with chain L Metal complexes: I:H.124, F:H.124, C:H.124, L:H.124 NI.7: 7 residues within 4Å: Chain C: H.124 Chain F: H.124 Chain I: H.124 Chain L: H.124 Ligands: NI.1, NI.3, NI.5 4 PLIP interactions: 1 interactions with chain I, 1 interactions with chain F, 1 interactions with chain C, 1 interactions with chain L Metal complexes: I:H.124, F:H.124, C:H.124, L:H.124

4 x DGA: DIACYL GLYCEROL(Non-covalent)

DGA.2: 12 residues within 4Å: Chain C: V.84, L.86, R.89, V.93 Chain H: E.53 Chain I: S.44, Y.45, Y.62, P.63, L.66, W.67, V.70 10 PLIP interactions: 6 interactions with chain I, 3 interactions with chain C, 1 interactions with chain H Hydrophobic interactions: I:Y.45, I:Y.62, I:P.63, I:L.66, I:W.67, I:V.70, C:R.89, C:V.93 Salt bridges: C:R.89 Hydrogen bonds: H:E.53 DGA.4: 12 residues within 4Å: Chain F: V.84, L.86, R.89, V.93 Chain K: E.53 Chain L: S.44, Y.45, Y.62, P.63, L.66, W.67, V.70 10 PLIP interactions: 6 interactions with chain L, 1 interactions with chain K, 3 interactions with chain F Hydrophobic interactions: L:Y.45, L:Y.62, L:P.63, L:L.66, L:W.67, L:V.70, F:R.89, F:V.93 Hydrogen bonds: K:E.53 Salt bridges: F:R.89 DGA.6: 12 residues within 4Å: Chain E: E.53 Chain F: S.44, Y.45, Y.62, P.63, L.66, W.67, V.70 Chain I: V.84, L.86, R.89, V.93 10 PLIP interactions: 3 interactions with chain I, 6 interactions with chain F, 1 interactions with chain E Hydrophobic interactions: I:R.89, I:V.93, F:Y.45, F:Y.62, F:P.63, F:L.66, F:W.67, F:V.70 Salt bridges: I:R.89 Hydrogen bonds: E:E.53 DGA.8: 12 residues within 4Å: Chain B: E.53 Chain C: S.44, Y.45, Y.62, P.63, L.66, W.67, V.70 Chain L: V.84, L.86, R.89, V.93 10 PLIP interactions: 6 interactions with chain C, 1 interactions with chain B, 3 interactions with chain L Hydrophobic interactions: C:Y.45, C:Y.62, C:P.63, C:L.66, C:W.67, C:V.70, L:R.89, L:V.93 Hydrogen bonds: B:E.53 Salt bridges: L:R.89

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Thompson, A.N. et al., Mechanism of potassium-channel selectivity revealed by Na(+) and Li(+) binding sites within the KcsA pore. Nat.Struct.Mol.Biol. (2009)

Release Date

2009-11-17

Peptides

Antibody Fab Fragment heavy chain: ADGJ
Antibody Fab 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.
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Antibody Fab Fragment heavy chain

Antibody Fab fragment light chain

Voltage-gated potassium channel

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