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CATH Superfamily 3.90.1150.10

Aspartate Aminotransferase, domain 1

The name of this superfamily has been modified since the most recent official CATH+ release (v4_2_0). At the point of the last release, this superfamily was named:

"
Aspartate Aminotransferase, domain 1
".

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 81046: Adenosylmethionine-8-amino-7-oxononanoate aminotra...

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
Adenosylmethionine--8-amino-7-oxononanoate transaminase. [EC: 2.6.1.62]
S-adenosyl-L-methionine + 8-amino-7-oxononanoate = S-adenosyl-4- methylthio-2-oxobutanoate + 7,8-diaminononanoate.
  • S-adenosylhomocysteine can also act as donor.
 2748 A0A009H4U7 A0A009H4U7 A0A009H7I8 A0A009H7I8 A0A009HLK1 A0A009HLK1 A0A009I9L5 A0A009I9L5 A0A009KA92 A0A009KA92
(2738 more...)
Biotin synthase. [EC: 2.8.1.6]
Dethiobiotin + sulfur-(sulfur carrier) + 2 S-adenosyl-L-methionine + 2 reduced [2Fe-2S] ferredoxin = biotin + (sulfur carrier) + 2 L-methionine + 2 5'-deoxyadenosine + 2 oxidized [2Fe-2S] ferredoxin.
  • The enzyme binds a [4Fe-4S] and a [2Fe-2S] cluster.
  • In every reaction cycle, the enzyme consumes two molecules of AdoMet, each producing 5'-deoxyadenosine and a putative dethiobiotinyl carbon radical.
  • Reaction with another equivalent of AdoMet results in abstraction of the C6 methylene pro-(S) hydrogen atom from 9-mercaptodethiobiotin, and the resulting carbon radical is quenched via formation of an intramolecular C-S bond, thus closing the biotin thiophane ring.
  • The sulfur donor is believed to be the [2Fe-2S] cluster, which is sacrificed in the process, so that in vitro the reaction is a single turnover.
  • In vivo, the [2Fe-2S] cluster can be reassembled by the Isc or Suf iron-sulfur cluster assembly systems, to allow further catalysis.
 94 A0A015QZI3 A0A015QZI3 A0A015T5U0 A0A015T5U0 A0A015U8V9 A0A015U8V9 A0A015U9V7 A0A015U9V7 A0A015ULK0 A0A015ULK0
(84 more...)
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