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9HZL

High resolution cryo-EM structure of human complex III in mitochondria

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, L
(A, N)
Cytochrome b-c1 complex subunit 8polymer829922.42UniProt (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, C, M, N
(B, C, O, P)
Cytochrome b-c1 complex subunit Rieske, mitochondrialpolymer27429705.04UniProt (P47985)
Pfam (PF09165)
Pfam (PF02921)
Pfam (PF00355)
Homo sapiens (human)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
3D, O
(D, Q)
Cytochrome b-c1 complex subunit 9polymer637320.52UniProt (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
4E, P
(E, R)
Cytochrome b-c1 complex subunit 6, mitochondrialpolymer9110753.82UniProt (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
5F, Q
(F, S)
Cytochrome b-c1 complex subunit 7polymer11113554.52UniProt (P14927)
Pfam (PF02271)
Homo sapiens (human)Complex III subunit 7,Complex III subunit VII,QP-C,Ubiquinol-cytochrome c reductase complex 14 kDa protein
6G, R
(G, T)
Cytochrome b-c1 complex subunit 10polymer566577.72UniProt (O14957)
Pfam (PF08997)
Homo sapiens (human)Complex III subunit 10,Complex III subunit XI,Ubiquinol-cytochrome c reductase complex 6.4 kDa protein
7H, S
(H, U)
Cytochrome c1, heme protein, mitochondrialpolymer32535469.02UniProt (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
8I, T
(J, V)
Cytochrome bpolymer38042745.32UniProt (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
9J, U
(K, W)
Cytochrome b-c1 complex subunit 2, mitochondrialpolymer45348495.82UniProt (P22695)
Pfam (PF00675)
Pfam (PF05193)
Homo sapiens (human)Complex III subunit 2,Core protein II,Ubiquinol-cytochrome-c reductase complex core protein 2
10K, V
(L, Y)
Cytochrome b-c1 complex subunit 1, mitochondrialpolymer48052704.72UniProt (P31930)
Pfam (PF00675)
Pfam (PF05193)
Homo sapiens (human)Complex III subunit 1,Core protein I,Ubiquinol-cytochrome-c reductase complex core protein 1
11BA, DA, HA, KA, OA...
(G, H, J, T, U...)
CARDIOLIPINnon-polymer1464.09Chemie (CDL)
PubChem (17753886)
PubChem (5287898)
12AB, LA, QA, X, XA...
(Y, L, U, C, V)
1,2-Distearoyl-sn-glycerophosphoethanolaminenon-polymer748.16Chemie (3PE)
13MA, Y
(P, C)
FE2/S2 (INORGANIC) CLUSTERnon-polymer175.82Chemie (FES)
14AA, PA
(D, 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-polymer767.12Chemie (PLX)
PubChem (49867511)
15CA, RA
(H, U)
HEME Cnon-polymer618.52Chemie (HEC)
16EA, FA, TA, UA
(J, V)
PROTOPORPHYRIN IX CONTAINING FEnon-polymer616.54Chemie (HEM)
17GA
(J)
1,2-dioleoyl-sn-glycero-3-phosphoethanolaminenon-polymer744.01Chemie (PEE)
PubChem (108229)
PubChem (44891344)
PubChem (54095275)
PubChem (14238554)
PubChem (5909904)
PubChem (9546757)
PubChem (6437392)
PubChem (99655478)
PubChem (99655479)
PubChem (9546744)
PubChem (138113035)
PubChem (171729549)
18IA, JA, VA, WA
(J, V)
UBIQUINONE-10non-polymer863.34Chemie (U10)
19NA
(P)
1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINEnon-polymer790.11Chemie (PC1)
PubChem (65146)
PubChem (94190)
PubChem (10417837)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains22
Total formula weight573907.0
Non-Polymers*Number of molecules31
Total formula weight28241.2
All*Total formula weight602148.1
*Water molecules are not included.

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PDB entries from 2026-05-13

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