SMTL ID : 5v02.1

A positive allosteric modulator binding pocket in SK2 ion channels is shared by Riluzole and CyPPA

Coordinates

PDB Format

Method

X-RAY DIFFRACTION 1.78 Å

Oligo State

hetero-1-1-mer

Ligands

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

SO4.1: 1 residues within 4Å: Chain A: R.57 2 PLIP interactions: 2 interactions with chain A Water bridges: A:R.61 Salt bridges: A:R.57 SO4.2: 4 residues within 4Å: Chain A: R.36, K.58, H.59, K.62 4 PLIP interactions: 4 interactions with chain A Salt bridges: A:R.36, A:K.58, A:H.59, A:K.62

1 x 657: 6-(trifluoromethoxy)-1,3-benzothiazol-2-amine(Non-covalent)

657.3: 12 residues within 4Å: Chain A: A.84, L.87, V.88 Chain B: F.20, L.33, M.52, E.55, V.56, I.64, F.69, M.72, M.73 4 PLIP interactions: 3 interactions with chain B, 1 interactions with chain A Hydrophobic interactions: B:V.56, B:M.72, A:V.88 Hydrogen bonds: B:E.55

1 x GOL: GLYCEROL(Non-functional Binders)

GOL.4: 4 residues within 4Å: Chain B: K.95, I.101, S.102, E.105 4 PLIP interactions: 4 interactions with chain B Hydrogen bonds: B:S.102, B:S.102 Water bridges: B:N.98, B:Y.100

2 x CA: CALCIUM ION(Non-covalent)

CA.5: 6 residues within 4Å: Chain B: D.57, D.59, N.61, T.63, D.65, 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.2 CA.6: 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.3

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Cho, L.T. et al., An Intracellular Allosteric Modulator Binding Pocket in SK2 Ion Channels Is Shared by Multiple Chemotypes. Structure (2018)

Release Date

2018-03-07

Peptides

Small conductance calcium-activated potassium channel protein 2: A
Calmodulin-1: B

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
B

B
R

Small conductance calcium-activated potassium channel protein 2

Calmodulin-1

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