Protein Family Models

Members of this family are all pyridoxal-phosphate dependent enzymes. This family includes: serine dehydratase EC:4.2.1.13 P20132, threonine dehydratase EC:4.2.1.16 Swiss:P04968, tryptophan synthase beta chain EC:4.2.1.20 Swiss:P00932, threonine synthase EC:4.2.99.2 Swiss:P04990, cysteine synthase EC:4.2.99.8 P11096, cystathionine beta-synthase EC:4.2.1.22 Swiss:P35520, 1-aminocyclopropane-1-carboxylate deaminase EC:4.1.99.4 Swiss:P76316. (from Pfam)

Date:

2024-08-14

Catalyzes the formation of cysteine from 3-O-acetyl-L-serine and hydrogen sulfide

Gene:

cysM

Date:

2021-07-29

This model discriminates cysteine synthases (EC 2.5.1.47) (both CysK and CysM) from cystathionine beta-synthase, a protein found primarily in eukaryotes and carrying a C-terminal CBS domain lacking from this protein. Bacterial proteins lacking the CBS domain but otherwise showing resemblamnce to cystathionine beta-synthases and considerable phylogenetic distance from known cysteine synthases were excluded from the seed and score below the trusted cutoff.

Date:

2024-05-30

CysM differs from CysK in that it can also use thiosulfate instead of sulfide, to produce cysteine thiosulfonate instead of cysteine. Alternate name: O-acetylserine (thiol)-lyase

Gene:

cysM

Date:

2021-04-27

cysteine synthase B (CysM) catalyzes the biosynthesis of cysteine and it can also use thiosulfate in place of sulfide to give cysteine thiosulfonate as a product

Date:

2023-02-22