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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_3_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 33: Cystathionine gamma-synthase

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
Cysteine-S-conjugate beta-lyase. [EC: 4.4.1.13]
An L-cysteine-S-conjugate + H(2)O = RSH + NH(3) + pyruvate.
  • A pyridoxal 5'-phosphate protein.
  • The enzyme is promiscuous regarding the moiety conjugated to L-cysteine, and can accept both aliphatic and aromatic substitutions.
  • The enzyme cleaves a carbon-sulfur bond, releasing a thiol and an unstable enamine product that tautomerizes to an imine form, which undergoes a hydrolytic deamination to form pyruvate and ammonia.
  • While bacteria and plants have dedicated enzymes, all of the animal enzymes discovered thus far are bifunctional, most of which also act as aminotransferases.
  • Formerly EC 4.4.1.6 and EC 4.4.1.8.
 10 A0A1B2AV35 A0A1B2AV35 A0A1B2AV35 L8AET3 L8AET3 L8AET3 O31632 O31632 O31632 O94350
Cystathionine gamma-synthase. [EC: 2.5.1.48]
O(4)-succinyl-L-homoserine + L-cysteine = L-cystathionine + succinate.
  • Also reacts with H(2)S and methanethiol as replacing agents, producing homocysteine and methionine, respectively.
  • In the absence of thiol, can also catalyze beta,gamma-elimination to form 2-oxobutanoate, succinate and ammonia.
  • Formerly EC 4.2.99.9.
 4 A0A178VB36 A0A178VB36 P55217 P55217
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