Each day Apimba highlights one enzyme from our curated database of biochemical catalysts. The selection is deterministic for the day, so everyone sees the same enzyme until midnight UTC.
EC Number: 2.5.1.48
Reaction: O4-succinyl-L-homoserine + L-cysteine = L-cystathionine + succinate
Systematic name: O4-succinyl-L-homoserine:L-cysteine S-(3-amino-3-carboxypropyl)transferase
Other names: O-succinyl-L-homoserine succinate-lyase (adding cysteine); O-succinylhomoserine (thiol)-lyase; homoserine O-transsuccinylase (ambiguous); O-succinylhomoserine synthase; O-succinylhomoserine synthetase; cystathionine synthase; cystathionine synthetase; homoserine transsuccinylase (ambiguous); 4-O-succinyl-L-homoserine:L-cysteine S-(3-amino-3-carboxypropyl)transferase
Comments: A pyridoxal-phosphate protein. Also reacts with hydrogen sulfide and methanethiol as replacing agents, producing homocysteine and methionine, respectively. In the absence of thiol, can also catalyse beta,gamma-elimination to form 2-oxobutanoate, succinate and ammonia.
CAS Number: 9030-70-0