Protein Family Models

Date:

2024-08-14

Date:

2024-08-14

Date:

2020-10-26

Catalyzes the formation of N-acetyl-L-glutamate 5-semialdehyde from 2-oxoglutarate and N(2)-acetyl-L-ornithine in the arginine biosynthetic pathway

Date:

2020-10-26

aspartate aminotransferase family protein such as glutamate-1-semialdehyde 2,1-aminomutase or succinylornithine transaminase, involved in transamination or decarboxylation of various substrates

Date:

2016-05-13

Members of the seed alignment for this protein family are the enzyme succinylornithine transaminase (EC 2.6.1.81), which catalyzes the third of five steps in arginine succinyltransferase (AST) pathway, an ammonia-releasing pathway of arginine degradation. All seed alignment sequences are found within arginine succinyltransferase operons, and all proteins that score above 820.0 bits should function as succinylornithine transaminase. However, a number of sequences extremely closely related in sequence, found in different genomic contexts, are likely to act in different biological processes and may act on different substrates. This model is desigated subfamily rather than equivalog, pending further consideration, for this reason.

Gene:

astC

Date:

2024-05-30

Catalyzes the transamination of 2-N-succinylornithine and alpha-ketoglutarate into 2-N-succinylglutamate semialdehyde and glutamate; also functions as the catabolic acetylornithine aminotransferase catalyzing the formation of 2-N-acetylglutamate semialdehyde and glutamate from 2-N-acetylornithine and alpha-ketoglutarate

Date:

2020-10-26

This family of proteins, for which ornithine aminotransferases form an outgroup, consists mostly of proteins designated acetylornithine aminotransferase. However, the two very closely related members from E. coli are assigned different enzymatic activities. One is acetylornithine aminotransferase (EC 2.6.1.11), ArgD, an enzyme of arginine biosynthesis, while another is succinylornithine aminotransferase, an enzyme of the arginine succinyltransferase pathway, an ammonia-generating pathway of arginine catabolism (See MEDLINE:98361920). Members of this family may also act on ornithine, like ornithine aminotransferase (EC 2.6.1.13) (see MEDLINE:90337349) and on succinyldiaminopimelate, like N-succinyldiaminopmelate-aminotransferase (EC 2.6.1.17, DapC, an enzyme of lysine biosynthesis) (see MEDLINE:99175097)

Date:

2022-02-09