Potassium in PDB 7sk1: TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5

Potassium Binding Sites:

The binding sites of Potassium atom in the TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5 (pdb code 7sk1). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total 3 binding sites of Potassium where determined in the TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5, PDB code: 7sk1:
Jump to Potassium binding site number: 1; 2; 3;

Potassium binding site 1 out of 3 in 7sk1

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Potassium Binding Sites List in 7sk1

Potassium binding site 1 out of 3 in the TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5

Mono view

Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5 within 5.0Å range:

probe	atom	residue	distance (Å)	B	Occ
A:K401 b:97.3 occ:1.00	O	B:ILE226	2.6	98.2	1.0
	O	A:ILE226	2.6	98.2	1.0
	O	A:THR225	2.7	101.1	1.0
	O	B:THR225	2.7	100.9	1.0
	O	B:THR117	2.7	101.4	1.0
	O	A:THR117	2.7	101.2	1.0
	O	B:THR118	2.9	98.9	1.0
	O	A:THR118	2.9	99.1	1.0
	K	A:K402	3.0	97.6	1.0
	C	B:THR118	3.4	98.9	1.0
	C	A:THR118	3.4	99.1	1.0
	K	A:K403	3.5	103.8	1.0
	C	B:ILE226	3.5	98.2	1.0
	C	A:ILE226	3.5	98.2	1.0
	C	B:THR117	3.8	101.4	1.0
	C	A:THR117	3.8	101.2	1.0
	CA	B:THR118	3.8	98.9	1.0
	CA	A:THR118	3.9	99.1	1.0
	C	A:THR225	3.9	101.1	1.0
	C	B:THR225	3.9	100.9	1.0
	CA	A:ILE226	4.0	98.2	1.0
	CA	B:ILE226	4.0	98.2	1.0
	N	B:GLY119	4.1	96.5	1.0
	N	A:GLY119	4.1	96.9	1.0
	N	B:THR118	4.3	98.9	1.0
	N	A:THR118	4.3	99.1	1.0
	CA	B:GLY119	4.4	96.5	1.0
	CA	A:GLY119	4.4	96.9	1.0
	N	A:ILE226	4.4	98.2	1.0
	N	B:ILE226	4.4	98.2	1.0
	N	B:GLY227	4.6	97.0	1.0
	N	A:GLY227	4.6	97.4	1.0
	CA	B:GLY227	4.9	97.0	1.0
	CA	B:THR117	4.9	101.4	1.0
	CA	A:GLY227	5.0	97.4	1.0
	CA	A:THR117	5.0	101.2	1.0

Potassium binding site 2 out of 3 in 7sk1

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Potassium Binding Sites List in 7sk1

Potassium binding site 2 out of 3 in the TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5

Mono view

Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 2 of TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5 within 5.0Å range:

probe	atom	residue	distance (Å)	B	Occ
A:K402 b:97.6 occ:1.00	O	A:THR118	2.8	99.1	1.0
	O	B:THR118	2.8	98.9	1.0
	O	B:ILE226	2.8	98.2	1.0
	O	B:GLY119	2.8	96.5	1.0
	O	A:GLY119	2.8	96.9	1.0
	O	A:ILE226	2.8	98.2	1.0
	K	A:K401	3.0	97.3	1.0
	O	B:GLY227	3.0	97.0	1.0
	O	A:GLY227	3.0	97.4	1.0
	C	A:GLY119	3.5	96.9	1.0
	C	B:GLY119	3.5	96.5	1.0
	C	B:GLY227	3.5	97.0	1.0
	C	A:GLY227	3.6	97.4	1.0
	CA	A:GLY119	3.6	96.9	1.0
	CA	B:GLY119	3.7	96.5	1.0
	C	A:THR118	3.8	99.1	1.0
	C	B:THR118	3.8	98.9	1.0
	C	B:ILE226	4.0	98.2	1.0
	C	A:ILE226	4.0	98.2	1.0
	N	B:LEU228	4.1	95.8	1.0
	N	A:LEU228	4.1	95.7	1.0
	CA	B:LEU228	4.1	95.8	1.0
	CA	A:LEU228	4.1	95.7	1.0
	N	A:GLY119	4.2	96.9	1.0
	N	B:GLY119	4.2	96.5	1.0
	CA	B:GLY227	4.3	97.0	1.0
	CA	A:GLY227	4.3	97.4	1.0
	N	B:GLY227	4.6	97.0	1.0
	N	A:GLY227	4.6	97.4	1.0
	N	B:TYR120	4.7	94.8	1.0
	N	A:TYR120	4.7	95.4	1.0
	C	B:LEU228	5.0	95.8	1.0
	C	A:LEU228	5.0	95.7	1.0

Potassium binding site 3 out of 3 in 7sk1

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Potassium Binding Sites List in 7sk1

Potassium binding site 3 out of 3 in the TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5

Mono view

Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 3 of TWIK1 in MSP1E3D1 Lipid Nanodisc at pH 5.5 within 5.0Å range:

probe	atom	residue	distance (Å)	B	Occ
A:K403 b:103.8 occ:1.00	OG1	B:THR225	2.7	100.9	1.0
	OG1	A:THR225	2.7	101.1	1.0
	O	A:THR117	2.7	101.2	1.0
	O	B:THR117	2.7	101.4	1.0
	O	B:THR225	2.9	100.9	1.0
	O	A:THR225	2.9	101.1	1.0
	OG1	A:THR117	2.9	101.2	1.0
	OG1	B:THR117	2.9	101.4	1.0
	CB	A:THR225	3.1	101.1	1.0
	CB	B:THR225	3.1	100.9	1.0
	CB	A:THR117	3.5	101.2	1.0
	CB	B:THR117	3.5	101.4	1.0
	K	A:K401	3.5	97.3	1.0
	C	B:THR225	3.6	100.9	1.0
	C	A:THR225	3.7	101.1	1.0
	C	A:THR117	3.7	101.2	1.0
	C	B:THR117	3.7	101.4	1.0
	CA	B:THR225	4.0	100.9	1.0
	CA	A:THR225	4.0	101.1	1.0
	CA	A:THR117	4.2	101.2	1.0
	CA	B:THR117	4.2	101.4	1.0
	CG2	A:THR225	4.2	101.1	1.0
	CG2	B:THR225	4.3	100.9	1.0
	N	B:ILE226	4.6	98.2	1.0
	N	A:ILE226	4.7	98.2	1.0
	N	A:THR118	4.7	99.1	1.0
	N	B:THR118	4.7	98.9	1.0
	CG2	A:THR117	4.7	101.2	1.0
	CG2	B:THR117	4.7	101.4	1.0
	CA	B:THR118	5.0	98.9	1.0
	CA	A:THR118	5.0	99.1	1.0

Reference:

T.S.Turney, V.Li, S.G.Brohawn. Structural Basis For pH-Gating of the K + Channel TWIK1 at the Selectivity Filter Biorxiv 2021.
DOI: 10.1101/2021.11.09.467928

Page generated: Sat Aug 9 14:53:55 2025

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