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8GS8

cryo-EM structure of the human respiratory complex II

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(A)
Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrialpolymer66472786.51UniProt (P31040)
Pfam (PF00890)
Pfam (PF02910)
Homo sapiens (human)Flavoprotein subunit of complex II,Fp
2B
(B)
Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrialpolymer28031674.81UniProt (P21912)
Pfam (PF13085)
Pfam (PF13534)
Homo sapiens (human)
3C
(C)
Succinate dehydrogenase cytochrome b560 subunit, mitochondrialpolymer16918632.21UniProt (Q99643)
Pfam (PF01127)
Homo sapiens (human)Integral membrane protein CII-3,QPs-1,QPs1,Succinate dehydrogenase complex subunit C,Succinate-ubiquinone oxidoreductase cytochrome B large subunit,CYBL
4D
(D)
Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrialpolymer15917064.01UniProt (O14521)
Pfam (PF05328)
Homo sapiens (human)
5E
(A)
FLAVIN-ADENINE DINUCLEOTIDEnon-polymer785.51Chemie (FAD)
6F
(B)
FE2/S2 (INORGANIC) CLUSTERnon-polymer175.81Chemie (FES)
7G
(B)
IRON/SULFUR CLUSTERnon-polymer351.61Chemie (SF4)
8H
(B)
FE3-S4 CLUSTERnon-polymer295.81Chemie (F3S)
9I
(C)
UBIQUINONE-1non-polymer250.31Chemie (UQ1)
10J
(D)
PROTOPORPHYRIN IX CONTAINING FEnon-polymer616.51Chemie (HEM)
11K
(D)
(1S)-2-{[(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATEnon-polymer720.01Chemie (PEV)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains4
Total formula weight140157.5
Non-Polymers*Number of molecules7
Total formula weight3195.6
All*Total formula weight143353.1
*Water molecules are not included.

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PDB entries from 2026-01-14

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