View in Gene3D

CATH Superfamily 1.20.58.100

Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal domain

The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was named:

"
Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal domain
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
« Back to all FunFams

FunFam 1: Succinate dehydrogenase flavoprotein subunit (SdhA...

There are 2 EC terms in this cluster

Please note: EC annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

Note: The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.

EC Term Annotations Evidence
Succinate dehydrogenase (quinone). [EC: 1.3.5.1]
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.
 19659 A0A023YTS3 A0A023YTS3 A0A023YTS3 A0A023YTS3 A0A023YTS3 A0A023YTS3 A0A023YTS3 A0A023YTS3 A0A023YTS3 A0A023YTS3
(19649 more...)
Fumarate reductase (quinol). [EC: 1.3.5.4]
Succinate + a quinone = fumarate + a quinol.
  • The enzyme, which is found in anaerobic and facultative organisms such as bacteria, parasitic helminthes, and lower marine organisms, utilizes low potential quinols, such as menaquinol and rhodoquinol, to reduce fumarate as the final step of an anaerobic respiratory chain.
  • The enzyme is known as complex II of the electron transfer chain, similarly to EC 1.3.5.1, to which it is closely related.
 11453 A0A023Z6Q8 A0A023Z6Q8 A0A023Z6Q8 A0A023Z6Q8 A0A023Z6Q8 A0A023Z6Q8 A0A023Z6Q8 A0A023Z6Q8 A0A023Z6Q8 A0A023Z6Q8
(11443 more...)