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9OCT

Cryo-EM structure of the cytochrome bc complex (CIII2) from Bacillus subtilis

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, J
(A, a)
Menaquinol:cytochrome c reductase iron-sulfur subunitpolymer16718759.42UniProt (P46911)Bacillus subtilisCytochrome bc complex,iron-sulfur subunit,Rieske iron-sulfur protein QcrA
2B, K
(B, b)
Menaquinol:cytochrome c reductase cytochrome b subunitpolymer22425513.12UniProt (P46912)Bacillus subtilisCytochrome bc complex,cytochrome b subunit
3C, L
(C, c)
Menaquinol:cytochrome c reductase cytochrome c subunitpolymer25528195.72UniProt (P46913)Bacillus subtilisCytochrome bc complex,cytochrome c subunit
4D, M
(D, d)
YqgWpolymer576260.52UniProt (P54500)Bacillus subtilis
5E, N
(E, e)
YqgYpolymer819427.22UniProt (P54502)Bacillus subtilis
6F, O
(F, f)
QcrFpolymer231975.42Bacillus subtilis
7G, P
(G, g)
QcrGpolymer293194.92Bacillus subtilis
8H, Q
(H, h)
YqzMpolymer444846.52UniProt (C0H453)Bacillus subtilis
9I, R
(I, i)
YlbApolymer12013508.52UniProt (O34743)Bacillus subtilis
10BA, S
(a, A)
FE2/S2 (INORGANIC) CLUSTERnon-polymer175.82Chemie (FES)
11DA, JA, T, Y
(b, c, B, C)
HEME Cnon-polymer620.54Chemie (HEC)
12EA, FA, U, V
(b, B)
PROTOPORPHYRIN IX CONTAINING FEnon-polymer616.54Chemie (HEM)
13GA, IA, W, X
(b, c, B)
MENAQUINONE-7non-polymer649.04Chemie (MQ7)
PubChem (5287554)
14CA, KA, LA, Z
(a, c, e, C)
1,2-dioleoyl-sn-glycero-3-phosphoethanolaminenon-polymer744.04Chemie (PEE)
15AA
(E)
1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINEnon-polymer790.11Chemie (PC1)
16HA
(b)
CARDIOLIPINnon-polymer1464.01Chemie (CDL)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains18
Total formula weight223362.4
Non-Polymers*Number of molecules20
Total formula weight13126.0
All*Total formula weight236488.4
*Water molecules are not included.

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PDB entries from 2026-11-04

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