SMTL ID : 6nfv.1

Structure of the KcsA-G77C mutant or the 2,4-ion bound configuration of a K+ channel selectivity filter.

Coordinates

PDB Format

Method

X-RAY DIFFRACTION 2.13 Å

Oligo State

hetero-4-4-4-mer

Ligands

4 x F09: NONAN-1-OL(Non-covalent)

F09.1: 4 residues within 4Å: Chain A: R.57 Chain C: A.29, W.66, V.70 3 PLIP interactions: 3 interactions with chain C Hydrophobic interactions: C:A.29, C:W.66, C:W.66 F09.7: 4 residues within 4Å: Chain D: R.57 Chain F: A.29, W.66, V.70 3 PLIP interactions: 3 interactions with chain F Hydrophobic interactions: F:A.29, F:W.66, F:W.66 F09.13: 4 residues within 4Å: Chain G: R.57 Chain I: A.29, W.66, V.70 3 PLIP interactions: 3 interactions with chain I Hydrophobic interactions: I:A.29, I:W.66, I:W.66 F09.19: 4 residues within 4Å: Chain J: R.57 Chain L: A.29, W.66, V.70 3 PLIP interactions: 3 interactions with chain L Hydrophobic interactions: L:A.29, L:W.66, L:W.66

4 x 1EM: (1S)-2-HYDROXY-1-[(NONANOYLOXY)METHYL]ETHYL MYRISTATE(Non-covalent)

1EM.2: 11 residues within 4Å: Chain C: L.65, R.68 Chain G: T.30 Chain H: E.53 Chain I: L.20, S.23, Y.24, Y.41, P.42, L.45, V.49 8 PLIP interactions: 5 interactions with chain I, 2 interactions with chain C, 1 interactions with chain G Hydrophobic interactions: I:L.20, I:Y.24, I:Y.41, I:L.45, I:V.49, C:L.65, G:T.30 Salt bridges: C:R.68 1EM.8: 11 residues within 4Å: Chain F: L.65, R.68 Chain J: T.30 Chain K: E.53 Chain L: L.20, S.23, Y.24, Y.41, P.42, L.45, V.49 8 PLIP interactions: 2 interactions with chain F, 5 interactions with chain L, 1 interactions with chain J Hydrophobic interactions: F:L.65, L:L.20, L:Y.24, L:Y.41, L:L.45, L:V.49, J:T.30 Salt bridges: F:R.68 1EM.14: 11 residues within 4Å: Chain D: T.30 Chain E: E.53 Chain F: L.20, S.23, Y.24, Y.41, P.42, L.45, V.49 Chain I: L.65, R.68 8 PLIP interactions: 5 interactions with chain F, 2 interactions with chain I, 1 interactions with chain D Hydrophobic interactions: F:L.20, F:Y.24, F:Y.41, F:L.45, F:V.49, I:L.65, D:T.30 Salt bridges: I:R.68 1EM.20: 11 residues within 4Å: Chain A: T.30 Chain B: E.53 Chain C: L.20, S.23, Y.24, Y.41, P.42, L.45, V.49 Chain L: L.65, R.68 8 PLIP interactions: 5 interactions with chain C, 2 interactions with chain L, 1 interactions with chain A Hydrophobic interactions: C:L.20, C:Y.24, C:Y.41, C:L.45, C:V.49, L:L.65, A:T.30 Salt bridges: L:R.68

16 x K: POTASSIUM ION(Non-covalent)(Non-functional Binders)

K.3: 7 residues within 4Å: Chain C: T.54 Chain F: T.54 Chain I: T.54 Chain L: T.54 Ligands: K.9, K.15, K.21 Ligand excluded by PLIP K.4: 7 residues within 4Å: Chain C: C.56 Chain F: C.56 Chain I: C.56 Chain L: C.56 Ligands: K.10, K.16, K.22 Ligand excluded by PLIP K.5: 3 residues within 4Å: Ligands: K.11, K.17, K.23 Ligand excluded by PLIP K.6: 3 residues within 4Å: Ligands: K.12, K.18, K.24 Ligand excluded by PLIP K.9: 7 residues within 4Å: Chain C: T.54 Chain F: T.54 Chain I: T.54 Chain L: T.54 Ligands: K.3, K.15, K.21 Ligand excluded by PLIP K.10: 7 residues within 4Å: Chain C: C.56 Chain F: C.56 Chain I: C.56 Chain L: C.56 Ligands: K.4, K.16, K.22 Ligand excluded by PLIP K.11: 3 residues within 4Å: Ligands: K.5, K.17, K.23 Ligand excluded by PLIP K.12: 3 residues within 4Å: Ligands: K.6, K.18, K.24 Ligand excluded by PLIP K.15: 7 residues within 4Å: Chain C: T.54 Chain F: T.54 Chain I: T.54 Chain L: T.54 Ligands: K.3, K.9, K.21 Ligand excluded by PLIP K.16: 7 residues within 4Å: Chain C: C.56 Chain F: C.56 Chain I: C.56 Chain L: C.56 Ligands: K.4, K.10, K.22 Ligand excluded by PLIP K.17: 3 residues within 4Å: Ligands: K.5, K.11, K.23 Ligand excluded by PLIP K.18: 3 residues within 4Å: Ligands: K.6, K.12, K.24 Ligand excluded by PLIP K.21: 7 residues within 4Å: Chain C: T.54 Chain F: T.54 Chain I: T.54 Chain L: T.54 Ligands: K.3, K.9, K.15 Ligand excluded by PLIP K.22: 7 residues within 4Å: Chain C: C.56 Chain F: C.56 Chain I: C.56 Chain L: C.56 Ligands: K.4, K.10, K.16 Ligand excluded by PLIP K.23: 3 residues within 4Å: Ligands: K.5, K.11, K.17 Ligand excluded by PLIP K.24: 3 residues within 4Å: Ligands: K.6, K.12, K.18 Ligand excluded by PLIP

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Tilegenova, C. et al., Structure, function, and ion-binding properties of a K+channel stabilized in the 2,4-ion-bound configuration. Proc.Natl.Acad.Sci.USA (2019)

Release Date

2019-08-07

Peptides

antibody fragment heavy chain: ADGJ
antibody fragment light chain: BEHK
pH-gated potassium channel KcsA: 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 fragment heavy chain

antibody fragment light chain

pH-gated potassium channel KcsA

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