Potassium in PDB 6zkj: Complex I with Nadh, OPEN3

All present enzymatic activity of Complex I with Nadh, OPEN3:
1.6.99.3; 7.1.1.2;

The structure of Complex I with Nadh, OPEN3 also contains other interesting chemical elements:

Zinc	(Zn)	1 atom
Iron	(Fe)	28 atoms

The binding sites of Potassium atom in the Complex I with Nadh, OPEN3 (pdb code 6zkj). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total only one binding site of Potassium was determined in the Complex I with Nadh, OPEN3, PDB code: 6zkj:

Potassium binding site 1 out of 1 in the Complex I with Nadh, OPEN3


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Complex I with Nadh, OPEN3 within 5.0Å range: probe atom residue distance (Å) B Occ 3:K804 b:40.3 occ:1.00 O 3:LEU208 2.8 26.7 1.0 OE1 3:GLN110 2.8 20.6 1.0 O 3:CYS203 2.9 28.9 1.0 O 3:VAL205 2.9 17.4 1.0 O 3:ILE200 2.9 31.6 1.0 CB 3:CYS203 3.4 12.5 1.0 CD 3:GLN110 3.5 17.9 1.0 C 3:CYS203 3.7 23.6 1.0 C 3:LEU208 4.0 21.4 1.0 CA 3:CYS203 4.0 21.1 1.0 C 3:ILE200 4.0 28.2 1.0 C 3:VAL205 4.1 10.4 1.0 SG 3:CYS203 4.1 40.5 1.0 NE2 3:GLN110 4.1 27.0 1.0 N 3:CYS203 4.3 17.9 1.0 CG 3:GLN110 4.4 18.1 1.0 CA 3:ILE200 4.5 26.5 1.0 N 3:VAL205 4.6 18.6 1.0 N 3:LEU208 4.6 21.3 1.0 SD c:MET45 4.7 57.0 1.0 CA 3:GLY206 4.7 12.3 1.0 CA 3:LEU208 4.7 25.8 1.0 O 3:ASP201 4.8 27.4 1.0 N 3:PRO204 4.8 21.0 1.0 CG2 3:ILE200 4.9 18.6 1.0 CB 3:LEU208 4.9 26.9 1.0 N 3:GLY206 4.9 8.3 1.0 N 3:THR209 4.9 21.5 1.0 O 3:ILE199 4.9 33.7 1.0 CB 3:GLN110 5.0 13.6 1.0

D.Kampjut, L.A.Sazanov. The Coupling Mechanism of Mammalian Respiratory Complex I. Science V. 370 2020.
ISSN: ESSN 1095-9203
PubMed: 32972993
DOI: 10.1126/SCIENCE.ABC4209