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CATH Superfamily 3.90.700.10

Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic 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:

"
Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic 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.
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FunFam 5: Succinate dehydrogenase flavoprotein subunit

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
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.
 5 A0A2J9KKJ2 A0A2J9KKJ2 O06913 O06913 Q9ZMP0
L-aspartate oxidase. [EC: 1.4.3.16]
L-aspartate + O(2) = iminosuccinate + H(2)O(2).
  • L-aspartate oxidase catalyzes the first step in the de novo biosynthesis of NAD(+) in some bacteria.
  • O(2) can be replaced by fumarate as electron acceptor, yielding succinate.
  • The ability of the enzyme to use both O(2) and fumarate in cofactor reoxidation enables it to function under both aerobic and anaerobic conditions.
  • Iminosuccinate can either be hydrolyzed to form oxaloacetate and NH(3) or can be used by EC 2.5.1.72 in the production of quinolinate.
 2 O66973 Q59767
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