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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)
PubChem (78184123)
PubChem (447791)
15LA, Z
(L, A)
UNDECYL-MALTOSIDEnon-polymer496.62Chemie (UMQ)
PubChem (44462510)
PubChem (46936455)
PubChem (70699426)
PubChem (70699431)
PubChem (70796434)
PubChem (71300307)
PubChem (58112566)
PubChem (59518662)
PubChem (124643296)
PubChem (68343856)
PubChem (70699429)
PubChem (70701336)
PubChem (70701337)
PubChem (70839940)
PubChem (70841479)
PubChem (70863062)
PubChem (71300308)
PubChem (89952000)
PubChem (92132109)
PubChem (447793)
PubChem (5076192)
PubChem (126731015)
PubChem (126731038)
PubChem (126735855)
PubChem (126735857)
PubChem (131632466)
PubChem (169544249)
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)
PubChem (49867661)
PubChem (45487276)
PubChem (5293)
PubChem (5326513)
PubChem (124383969)
PubChem (443658)
PubChem (92966532)
PubChem (447884)
PubChem (101724523)
PubChem (124708091)
PubChem (5353970)
PubChem (124936630)
PubChem (124936631)
PubChem (125116916)
PubChem (6435507)
PubChem (159935206)
PubChem (162931293)
PubChem (162931294)
PubChem (162931295)
18DA, PA
(C, N)
(2R)-3-{[(S)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-2-(tetradecanoyloxy)propyl octadecanoatenon-polymer692.02Chemie (8PE)
PubChem (447790)
PubChem (9546733)
19EA, QA
(C, N)
(1R)-2-{[(S)-(2-aminoethoxy)(hydroxy)phosphoryl]oxy}-1-[(heptanoyloxy)methyl]ethyl octadecanoatenon-polymer593.82Chemie (9PE)
PubChem (24779687)
PubChem (138256935)
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)
PubChem (24779688)
21HA, TA
(D, O)
(1R)-2-(dodecanoyloxy)-1-[(phosphonooxy)methyl]ethyl tetradecanoatenon-polymer564.72Chemie (7PH)
PubChem (24779689)
PubChem (138276598)
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)
PubChem (24779690)
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 2026-03-25

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