SMTL ID : 6rv2.1 (1 other biounit)

Crystal structure of the human two pore domain potassium ion channel TASK-1 (K2P3.1) in a closed conformation

Coordinates

PDB Format

Method

X-RAY DIFFRACTION 3.00 Å

Oligo State

homo-dimer

Ligands

4 x K: POTASSIUM ION(Non-covalent)

K.1: 10 residues within 4Å: Chain A: I.94, G.95, I.200, G.201 Chain B: I.94, G.95, I.200, G.201 Ligands: K.2, K.8 5 PLIP interactions: 3 interactions with chain A, 2 interactions with chain B Metal complexes: A:I.94, A:I.200, A:G.201, B:I.94, B:I.200 K.2: 10 residues within 4Å: Chain A: T.93, I.94, T.199, I.200 Chain B: T.93, I.94, T.199, I.200 Ligands: K.1, K.3 5 PLIP interactions: 2 interactions with chain A, 3 interactions with chain B Metal complexes: A:I.94, A:I.200, B:I.94, B:T.199, B:I.200 K.3: 5 residues within 4Å: Chain A: T.93, T.199 Chain B: T.93, T.199 Ligands: K.2 5 PLIP interactions: 2 interactions with chain B, 3 interactions with chain A Metal complexes: B:T.93, B:T.199, A:T.93, A:T.93, A:T.199 K.8: 9 residues within 4Å: Chain A: G.95, Y.96, G.201, F.202 Chain B: G.95, Y.96, G.201, F.202 Ligands: K.1 5 PLIP interactions: 3 interactions with chain A, 2 interactions with chain B Metal complexes: A:G.95, A:Y.96, A:G.201, B:G.95, B:Y.96

4 x Y01: CHOLESTEROL HEMISUCCINATE(Non-covalent)

Y01.4: 12 residues within 4Å: Chain A: R.3, V.6, R.7, L.11, F.238, V.242, F.246 Chain B: L.115, L.116, P.119, L.120, V.123 13 PLIP interactions: 7 interactions with chain A, 6 interactions with chain B Hydrophobic interactions: A:V.6, A:R.7, A:F.238, A:V.242, A:F.246, B:L.115, B:L.116, B:P.119, B:L.120, B:V.123, B:V.123 Salt bridges: A:R.3, A:R.7 Y01.5: 10 residues within 4Å: Chain A: R.79, F.80, A.81, F.84, Q.215, P.218, V.221, A.222, F.225 Chain B: F.16 13 PLIP interactions: 11 interactions with chain A, 2 interactions with chain B Hydrophobic interactions: A:F.80, A:A.81, A:F.84, A:F.84, A:V.221, A:F.225, A:F.225, B:F.16, B:F.16 Hydrogen bonds: A:F.80, A:A.81, A:Q.215 Water bridges: A:G.82 Y01.9: 13 residues within 4Å: Chain A: L.115, L.116, P.119, L.120, V.123 Chain B: R.3, V.6, R.7, L.11, F.238, V.242, V.243, F.246 13 PLIP interactions: 8 interactions with chain B, 5 interactions with chain A Hydrophobic interactions: B:V.6, B:R.7, B:F.238, B:V.242, B:V.243, B:F.246, A:L.115, A:L.116, A:L.120, A:V.123, A:V.123 Salt bridges: B:R.3, B:R.7 Y01.10: 12 residues within 4Å: Chain A: F.16 Chain B: R.79, F.80, A.81, F.84, L.214, Q.215, P.218, V.221, A.222, F.225, V.226 17 PLIP interactions: 15 interactions with chain B, 2 interactions with chain A Hydrophobic interactions: B:F.80, B:A.81, B:F.84, B:F.84, B:V.221, B:A.222, B:F.225, B:F.225, B:V.226, A:F.16, A:F.16 Hydrogen bonds: B:F.80, B:A.81, B:L.214, B:Q.215 Water bridges: B:G.82 Salt bridges: B:R.79

2 x DMU: DECYL-BETA-D-MALTOPYRANOSIDE(Non-covalent)

DMU.6: 6 residues within 4Å: Chain A: R.131, I.132, T.134, L.135, Y.138 Chain B: K.2 5 PLIP interactions: 4 interactions with chain A, 1 interactions with chain B Hydrophobic interactions: A:R.131, A:I.132, A:T.134, A:L.135 Salt bridges: B:K.2 DMU.11: 5 residues within 4Å: Chain A: K.2 Chain B: R.131, T.134, L.135, Y.138 4 PLIP interactions: 3 interactions with chain B, 1 interactions with chain A Hydrophobic interactions: B:R.131, B:T.134, B:L.135 Salt bridges: A:K.2

2 x PC1: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE(Non-covalent)

PC1.7: 6 residues within 4Å: Chain A: G.105, V.108, F.112 Chain B: V.25, A.28, L.29 3 PLIP interactions: 1 interactions with chain B, 2 interactions with chain A Hydrophobic interactions: B:V.25, A:V.108, A:F.112 PC1.12: 4 residues within 4Å: Chain A: L.29 Chain B: G.105, V.108, F.112 4 PLIP interactions: 1 interactions with chain A, 3 interactions with chain B Hydrophobic interactions: A:L.29, B:V.108, B:F.112, B:F.112

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Rodstrom, K.E.J. et al., A lower X-gate in TASK channels traps inhibitors within the vestibule. Nature (2020)

Release Date

2019-08-07

Peptides

Potassium channel subfamily K member 3: AB

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

Membrane

We predict this structure to be a membrane protein.
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Potassium channel subfamily K member 3

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