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3CX5

Structure of complex III with bound cytochrome c in reduced state and definition of a minimal core interface for electron transfer.

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, L
(A, L)
Cytochrome b-c1 complex subunit 1, mitochondrialpolymer43147445.22UniProt (P07256)
Pfam (PF00675)
Pfam (PF05193)
Saccharomyces cerevisiae (yeast)Ubiquinol- cytochrome-c reductase complex core protein 1, Core protein I, Complex III subunit 1
2B, M
(B, M)
Cytochrome b-c1 complex subunit 2, mitochondrialpolymer35238751.92UniProt (P07257)
Pfam (PF00675)
Saccharomyces cerevisiae (yeast)Ubiquinol- cytochrome-c reductase complex core protein 2, Core protein II, Complex III subunit 2
3C, N
(C, N)
CYTOCHROME Bpolymer38543686.62UniProt (P00163)
Pfam (PF00033)
Pfam (PF00032)
Saccharomyces cerevisiae (yeast)
4D, O
(D, O)
Cytochrome c1, heme protein, mitochondrialpolymer24827807.42UniProt (P07143)
Pfam (PF02167)
Saccharomyces cerevisiae (yeast)Cytochrome c-1, Cytochrome b-c1 complex subunit 4, Ubiquinol-cytochrome-c reductase complex cytochrome c1 subunit, Complex III subunit 4, Complex III subunit IV
5E, P
(E, P)
Cytochrome b-c1 complex subunit Rieske, mitochondrialpolymer18520123.02UniProt (P08067)
Pfam (PF02921)
Pfam (PF00355)
Saccharomyces cerevisiae (yeast)Ubiquinol-cytochrome c reductase iron-sulfur subunit, Rieske iron-sulfur protein, RISP, Complex III subunit 5
6F, Q
(F, Q)
Cytochrome b-c1 complex subunit 6polymer14617144.92UniProt (P00127)
Pfam (PF02320)
Saccharomyces cerevisiae (yeast)Ubiquinol-cytochrome c reductase complex 17 kDa protein, Cytochrome c1 non-heme 17 kDa protein, Mitochondrial hinge protein, Complex III subunit 6, Complex III subunit VI
7G, R
(G, R)
Cytochrome b-c1 complex subunit 7polymer12614452.62UniProt (P00128)
Pfam (PF02271)
Saccharomyces cerevisiae (yeast)Ubiquinol-cytochrome c reductase c reductase complex 14 kDa protein, Complex III subunit 7, Complex III subunit VII
8H, S
(H, S)
Cytochrome b-c1 complex subunit 8polymer9310856.32UniProt (P08525)
Pfam (PF02939)
Saccharomyces cerevisiae (yeast)Ubiquinol-cytochrome c reductase complex ubiquinone-binding protein QP-C, Ubiquinol-cytochrome c reductase complex 11 kDa protein, Complex III subunit VII, Complex III subunit 8
9I, T
(I, T)
Cytochrome b-c1 complex subunit 9polymer657354.12UniProt (P22289)
Pfam (PF05365)
Saccharomyces cerevisiae (yeast)Ubiquinol-cytochrome c reductase complex 7.3 kDa protein, Cytochrome c1 non-heme 7.3 kDa protein, Complex III subunit X, Complex III subunit 9
10J, U
(J, U)
HEAVY CHAIN (VH) OF FV-FRAGMENTpolymer12714365.82Mus musculus (house mouse)
11K, V
(K, V)
LIGHT CHAIN (VL) OF FV-FRAGMENTpolymer10711926.42Mus musculus (house mouse)
12W
(W)
Cytochrome c iso-1polymer10812115.91UniProt (P00044)
Pfam (PF00034)
Saccharomyces cerevisiae (yeast)
13X
(X)
beta-D-fructofuranose-(2-1)-alpha-D-glucopyranosebranched342.31In PDB
BIRD (PRD_900003)
sucrose
14KA, Y
(L, A)
(1R)-2-(phosphonooxy)-1-[(tridecanoyloxy)methyl]ethyl pentadecanoatenon-polymer592.82Chemie (6PH)
15LA, Z
(L, A)
UNDECYL-MALTOSIDEnon-polymer496.62Chemie (UMQ)
16AA, BA, GA, MA, NA...
(C, D, N, O, W)
PROTOPORPHYRIN IX CONTAINING FEnon-polymer616.57Chemie (HEM)
17CA, OA
(C, N)
STIGMATELLIN Anon-polymer514.62Chemie (SMA)
18DA, PA
(C, N)
(2R)-3-{[(S)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-(tetradecanoyloxy)propyl octadecanoatenon-polymer692.02Chemie (8PE)
19EA, QA
(C, N)
(1R)-2-{[(S)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-1-[(heptanoyloxy)methyl]ethyl octadecanoatenon-polymer593.82Chemie (9PE)
20FA
(C)
(5S,11R)-5,8,11-trihydroxy-5,11-dioxido-17-oxo-4,6,10,12,16-pentaoxa-5,11-diphosphaoctadec-1-yl pentadecanoatenon-polymer634.61Chemie (CN5)
21HA, TA
(D, O)
(1R)-2-(dodecanoyloxy)-1-[(phosphonooxy)methyl]ethyl tetradecanoatenon-polymer564.72Chemie (7PH)
22IA, RA
(D, N)
(2R,5S,11R,14R)-5,8,11-trihydroxy-2-(nonanoyloxy)-5,11-dioxido-16-oxo-14-[(propanoyloxy)methyl]-4,6,10,12,15-pentaoxa-5,11-diphosphanonadec-1-yl undecanoatenon-polymer834.92Chemie (CN3)
23JA, UA
(E, P)
FE2/S2 (INORGANIC) CLUSTERnon-polymer175.82Chemie (FES)
24AB, BB, CB, DB, EB...
(E, F, G, H, I...)
waterwater18.01648Chemie (HOH)
Sequence modifications
A, L: 27 - 457 (UniProt: P07256)
PDBExternal DatabaseDetails
Asp 153Glu 153conflict
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains23
Total formula weight519944.2
BranchedNumber of molecules1
Total formula weight342.3
Non-Polymers*Number of molecules24
Total formula weight13880.4
All*Total formula weight534166.9
*Water molecules are not included.

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PDB entries from 2025-06-11

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