Potassium in PDB 6zkq: Native Complex I, OPEN2

All present enzymatic activity of Native Complex I, OPEN2:
1.6.99.3; 7.1.1.2;

The structure of Native Complex I, OPEN2 also contains other interesting chemical elements:

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

The binding sites of Potassium atom in the Native Complex I, OPEN2 (pdb code 6zkq). 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 Native Complex I, OPEN2, PDB code: 6zkq:

Potassium binding site 1 out of 1 in the Native Complex I, OPEN2


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Native Complex I, OPEN2 within 5.0Å range: probe atom residue distance (Å) B Occ 3:K804 b:64.0 occ:1.00 O 3:LEU208 2.9 27.4 1.0 OE1 3:GLN110 2.9 21.3 1.0 O 3:CYS203 2.9 29.7 1.0 O 3:ILE200 2.9 35.6 1.0 O 3:VAL205 2.9 18.1 1.0 CB 3:CYS203 3.6 28.6 1.0 CD 3:GLN110 3.6 18.6 1.0 C 3:CYS203 3.8 24.3 1.0 C 3:LEU208 4.0 22.1 1.0 C 3:ILE200 4.0 28.9 1.0 C 3:VAL205 4.1 15.4 1.0 CA 3:CYS203 4.1 21.8 1.0 SG 3:CYS203 4.2 72.6 1.0 NE2 3:GLN110 4.3 18.6 1.0 N 3:CYS203 4.4 21.9 1.0 CG 3:GLN110 4.5 18.8 1.0 CA 3:ILE200 4.5 27.2 1.0 CG2 3:THR209 4.6 55.4 1.0 N 3:VAL205 4.7 19.4 1.0 N 3:LEU208 4.7 22.0 1.0 SD c:MET45 4.7 57.7 1.0 CA 3:GLY206 4.8 21.6 1.0 O 3:ASP201 4.8 19.9 1.0 CA 3:LEU208 4.8 26.5 1.0 N 3:THR209 4.8 22.2 1.0 CA 3:THR209 4.9 32.9 1.0 O 3:ILE199 4.9 35.3 1.0 N 3:PRO204 4.9 21.7 1.0 N 3:GLY206 4.9 18.8 1.0 CB 3:LEU208 4.9 27.6 1.0 CG2 3:ILE200 4.9 53.1 1.0 C 3:PRO204 5.0 18.9 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