The Enzyme Database

Your query returned 1 entry.    printer_iconPrintable version

Accepted name: β-(isoxazolin-5-on-2-yl)-L-alanine synthase
Reaction: O-acetyl-L-serine + isoxazolin-5-one = 3-(5-oxoisoxazolin-2-yl)-L-alanine + acetate
For diagram of O3-Acetyl-L-serine metabolism, click here
Systematic name: O-acetyl-L-serine:isoxazolin-5-one 2-(2-amino-2-carboxyethyl)transferase
Comments: The enzyme from the plants Lathyrus odoratus (sweet pea) and L. sativus (grass pea) also forms 3-(5-oxoisoxazolin-4-yl)-L-alanine in vitro (cf. EC However, only 3-(5-oxoisoxazolin-2-yl)-L-alanine is formed in vivo. 3-(5-oxoisoxazolin-2-yl)-L-alanine is the biosynthetic precursor of the neurotoxin N3-oxalyl-L-2,3-diaminopropanoic acid, the cause of lathyrism. Closely related and possibly identical to EC, cysteine synthase, and EC, β-pyrazolylalanine synthase.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Ikegami, F., Kamiya, M., Kuo, Y.H., Lambein, F. and Murakoshi, I. Enzymatic synthesis of two isoxazolylalanine isomers by cysteine synthases in Lathyrus species. Biol. Pharm. Bull. 19 (1996) 1214–1215. [PMID: 8889043]
[EC created 2014]

Data © 2001–2024 IUBMB
Web site © 2005–2024 Andrew McDonald