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5XTE

Cryo-EM structure of human respiratory complex III (cytochrome bc1 complex)

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, L
(A, N)
Cytochrome b-c1 complex subunit 8polymer819791.22UniProt (O14949)
Pfam (PF02939)
Homo sapiens (Human)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
2B, M
(B, O)
Cytochrome b-c1 complex subunit Rieske, mitochondrialpolymer575893.82UniProt (P47985)
Pfam (PF09165)
Homo sapiens (Human)Complex III subunit 5,Cytochrome b-c1 complex subunit 5,Rieske iron-sulfur protein,RISP,Ubiquinol-cytochrome c reductase iron-sulfur subunit
3C, N
(C, P)
Cytochrome b-c1 complex subunit Rieske, mitochondrialpolymer19621645.62UniProt (P47985)
Pfam (PF02921)
Pfam (PF00355)
Homo sapiens (Human)Complex III subunit 5,Cytochrome b-c1 complex subunit 5,Rieske iron-sulfur protein,RISP,Ubiquinol-cytochrome c reductase iron-sulfur subunit
4D, O
(D, Q)
Cytochrome b-c1 complex subunit 9polymer627189.32UniProt (Q9UDW1)
Pfam (PF05365)
Homo sapiens (Human)Complex III subunit 9,Complex III subunit X,Cytochrome c1 non-heme 7 kDa protein,Ubiquinol-cytochrome c reductase complex 7.2 kDa protein
5E, P
(E, R)
Cytochrome b-c1 complex subunit 6, mitochondrialpolymer758990.92UniProt (P07919)
Pfam (PF02320)
Homo sapiens (Human)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
6F, Q
(F, S)
Cytochrome b-c1 complex subunit 7polymer10613037.82UniProt (P14927)
Pfam (PF02271)
Homo sapiens (Human)Complex III subunit 7,Complex III subunit VII,QP-C,Ubiquinol-cytochrome c reductase complex 14 kDa protein
7G, R
(G, T)
Cytochrome b-c1 complex subunit 10polymer515958.92UniProt (O14957)
Pfam (PF08997)
Homo sapiens (Human)Complex III subunit 10,Complex III subunit XI,Ubiquinol-cytochrome c reductase complex 6.4 kDa protein
8H, S
(H, U)
Cytochrome c1, heme protein, mitochondrialpolymer24127388.42UniProt (P08574)
Pfam (PF02167)
Homo sapiens (Human)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
9I, T
(J, V)
Cytochrome bpolymer37842543.02UniProt (P00156)
Pfam (PF00033)
Pfam (PF00032)
Homo sapiens (Human)Complex III subunit 3,Complex III subunit III,Cytochrome b-c1 complex subunit 3,Ubiquinol-cytochrome-c reductase complex cytochrome b subunit
10J, U
(K, W)
Cytochrome b-c1 complex subunit 2, mitochondrialpolymer41944946.62UniProt (P22695)
Pfam (PF00675)
Pfam (PF05193)
Homo sapiens (Human)Complex III subunit 2,Core protein II,Ubiquinol-cytochrome-c reductase complex core protein 2
11K, V
(L, Y)
Cytochrome b-c1 complex subunit 1, mitochondrialpolymer44649181.42UniProt (P31930)
Pfam (PF00675)
Pfam (PF05193)
Homo sapiens (Human)Complex III subunit 1,Core protein I,Ubiquinol-cytochrome-c reductase complex core protein 1
12BA, FA, GA, IA, KA...
(H, J, L, N, U...)
CARDIOLIPINnon-polymer1464.09Chemie (CDL)
PubChem (5287898)
PubChem (17753886)
13LA, X
(P, C)
FE2/S2 (INORGANIC) CLUSTERnon-polymer175.82Chemie (FES)
14EA, JA, OA, TA, VA...
(J, L, U, V, Y...)
1,2-dioleoyl-sn-glycero-3-phosphoethanolaminenon-polymer744.06Chemie (PEE)
PubChem (108229)
PubChem (6437392)
PubChem (9546744)
PubChem (44891344)
PubChem (54095275)
PubChem (14238554)
PubChem (5909904)
PubChem (9546757)
PubChem (99655478)
PubChem (99655479)
PubChem (138113035)
PubChem (171729549)
15AA, PA
(H, U)
HEME Cnon-polymer618.52Chemie (HEC)
16CA, DA, RA, SA
(J, V)
PROTOPORPHYRIN IX CONTAINING FEnon-polymer616.54Chemie (HEM)
17HA, MA, NA
(L, Q, T)
(9R,11S)-9-({[(1S)-1-HYDROXYHEXADECYL]OXY}METHYL)-2,2-DIMETHYL-5,7,10-TRIOXA-2LAMBDA~5~-AZA-6LAMBDA~5~-PHOSPHAOCTACOSANE-6,6,11-TRIOLnon-polymer767.13Chemie (PLX)
PubChem (49867511)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains22
Total formula weight473133.8
Non-Polymers*Number of molecules26
Total formula weight23996.6
All*Total formula weight497130.4
*Water molecules are not included.

251801

PDB entries from 2026-04-08

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