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6ZFT

Crystal structure of bovine cytochrome bc1 in complex with quinolone inhibitor CK-2-68

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(A)
Cytochrome b-c1 complex subunit 1, mitochondrialpolymer44449124.11UniProt (P31800)
Pfam (PF00675)
Pfam (PF05193)
Bos taurus (cattle)Complex III subunit 1,Core protein I,Ubiquinol-cytochrome-c reductase complex core protein 1
2B
(B)
Cytochrome b-c1 complex subunit 2, mitochondrialpolymer42044730.31UniProt (P23004)
Pfam (PF00675)
Pfam (PF05193)
Bos taurus (cattle)Complex III subunit 2,Core protein II,Ubiquinol-cytochrome-c reductase complex core protein 2
3C
(C)
Cytochrome bpolymer37842489.11UniProt (P00157)
Pfam (PF00033)
Pfam (PF00032)
Bos taurus (cattle)Complex III subunit 3,Complex III subunit III,Cytochrome b-c1 complex subunit 3,Ubiquinol-cytochrome-c reductase complex cytochrome b subunit
4D
(D)
Cytochrome c1, heme protein, mitochondrialpolymer23927107.01UniProt (P00125)
Pfam (PF02167)
Bos taurus (cattle)Complex III subunit 4,Complex III subunit IV,Cytochrome b-c1 complex subunit 4,Ubiquinol-cytochrome-c reductase complex cytochrome c1 subunit,Cytochrome c-1
5E
(E)
Cytochrome b-c1 complex subunit Rieske, mitochondrialpolymer19621640.61UniProt (P13272)
Pfam (PF02921)
Pfam (PF00355)
Bos taurus (cattle)Complex III subunit 5,Cytochrome b-c1 complex subunit 5,Rieske iron-sulfur protein,RISP,Rieske protein UQCRFS1,Ubiquinol-cytochrome c reductase iron-sulfur subunit
6F
(F)
Cytochrome b-c1 complex subunit 7polymer9912356.11UniProt (P00129)
Pfam (PF02271)
Bos taurus (cattle)Complex III subunit 7,Complex III subunit VII,QP-C,Ubiquinol-cytochrome c reductase complex 14 kDa protein
7G
(G)
Cytochrome b-c1 complex subunit 8polymer748799.21UniProt (P13271)
Pfam (PF02939)
Bos taurus (cattle)Complex III subunit 8,Complex III subunit VIII,Ubiquinol-cytochrome c reductase complex 9.5 kDa protein,Ubiquinol-cytochrome c reductase complex ubiquinone-binding protein QP-C
8H
(H)
Cytochrome b-c1 complex subunit 6, mitochondrialpolymer657628.61UniProt (P00126)
Pfam (PF02320)
Bos taurus (cattle)Complex III subunit 6,Complex III subunit VIII,Cytochrome c1 non-heme 11 kDa protein,Mitochondrial hinge protein,Ubiquinol-cytochrome c reductase complex 11 kDa protein
9I
(I)
Cytochrome b-c1 complex subunit Rieske, mitochondrialpolymer464827.61UniProt (P13272)
Pfam (PF09165)
Bos taurus (cattle)Complex III subunit 5,Cytochrome b-c1 complex subunit 5,Rieske iron-sulfur protein,RISP,Rieske protein UQCRFS1,Ubiquinol-cytochrome c reductase iron-sulfur subunit
10J
(J)
Cytochrome b-c1 complex subunit 9polymer596866.91UniProt (P00130)
Pfam (PF05365)
Bos taurus (cattle)Complex III subunit 9,Complex III subunit X,Cytochrome c1 non-heme 7 kDa protein,Ubiquinol-cytochrome c reductase complex 7.2 kDa protein
11K, M, S, T
(A, C)
TETRAETHYLENE GLYCOLnon-polymer194.24Chemie (PG4)
PubChem (8200)
12L
(A)
1,2-DIHEXANOYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINEnon-polymer410.41Chemie (6PE)
PubChem (49866560)
13CA, N, U, Y
(E, C, D)
CARDIOLIPINnon-polymer1464.04Chemie (CDL)
PubChem (17753886)
PubChem (5287898)
14O, P
(C)
PROTOPORPHYRIN IX CONTAINING FEnon-polymer616.52Chemie (HEM)
15Q
(C)
7-chloranyl-3-methyl-2-[4-[[4-(trifluoromethyloxy)phenyl]methyl]phenyl]-1~{H}-quinolin-4-onenon-polymer443.81Chemie (JHB)
PubChem (56965336)
16R
(C)
DODECYL-BETA-D-MALTOSIDEnon-polymer510.61Chemie (LMT)
17V, Z
(C, D)
1,2-dioleoyl-sn-glycero-3-phosphoethanolaminenon-polymer744.02Chemie (PEE)
PubChem (44891344)
PubChem (54095275)
PubChem (14238554)
PubChem (5909904)
PubChem (9546757)
PubChem (99655478)
PubChem (99655479)
PubChem (108229)
PubChem (6437392)
PubChem (9546744)
PubChem (138113035)
PubChem (171729549)
18DA, EA, FA, GA, HA...
(F, G, H, C)
PHOSPHATE IONnon-polymer95.06Chemie (PO4)
PubChem (1061)
19X
(D)
HEME Cnon-polymer618.51Chemie (HEC)
20AA
(E)
FE2/S2 (INORGANIC) CLUSTERnon-polymer175.81Chemie (FES)
21BA
(E)
1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINEnon-polymer678.91Chemie (PX4)
PubChem (26198)
PubChem (87505)
PubChem (5313082)
22IA, JA, KA, LA, MA
(A, B, C, D, F)
waterwater18.011Chemie (HOH)
Sequence modifications
A: 3 - 446 (UniProt: P31800)
PDBExternal DatabaseDetails
Thr 227Ala 261conflict
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains10
Total formula weight225569.5
Non-Polymers*Number of molecules24
Total formula weight12762.1
All*Total formula weight238331.6
*Water molecules are not included.

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PDB entries from 2026-05-20

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