CATH Classification

Domain Context

CATH Clusters

Superfamily Alpha-helical ferredoxin
Functional Family Succinate dehydrogenase iron-sulfur subunit SdhB

Enzyme Information

1.3.5.1
Succinate dehydrogenase (quinone).
based on mapping to UniProt P07014
Succinate + a quinone = fumarate + a quinol.
-!- The enzyme is found in the inner mitochondrial membrane in eukaryotes and the plasma membrane of many aerobic or facultative bacteria. -!- It catalyzes succinate oxidation in the citric acid cycle and transfers the electrons to quinones in the membrane, thus constituting a part of the aerobic respiratory chain (known as complex II). -!- In vivo the enzyme uses the quinone found in the organism - eukaryotic enzymes utilize ubiquinone, bacterial enzymes utilize ubiquinone or menaquinone, and archaebacterial enzymes from the Sulfolobus genus use caldariellaquinone. -!- Cf. EC 1.3.5.4.

UniProtKB Entries (1)

P0AC41
SDHA_ECOLI
Escherichia coli K-12
Succinate dehydrogenase flavoprotein subunit

PDB Structure

PDB 1NEN
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Architecture of succinate dehydrogenase and reactive oxygen species generation
Yankovskaya, V., Horsefield, R., Tornroth, S., Luna-Chavez, C., Miyoshi, H., Leger, C., Byrne, B., Cecchini, G., Iwata, S.
Science