KEGG   ENZYME: 2.5.1.53
Entry
EC 2.5.1.53                 Enzyme                                 
Name
uracilylalanine synthase;
O3-acetyl-L-serine acetate-lyase (adding uracil);
isowillardiine synthase;
willardiine synthase;
3-O-acetyl-L-serine:uracil 1-(2-amino-2-carboxyethyl)transferase;
O3-acetyl-L-serine:uracil 1-(2-amino-2-carboxyethyl)transferase
Class
Transferases;
Transferring alkyl or aryl groups, other than methyl groups;
Transferring alkyl or aryl groups, other than methyl groups (only sub-subclass identified to date)
Sysname
O-acetyl-L-serine:uracil 1-(2-amino-2-carboxyethyl)transferase
Reaction(IUBMB)
O-acetyl-L-serine + uracil = 3-(uracil-1-yl)-L-alanine + acetate [RN:R03131]
Reaction(KEGG)
R03131
Substrate
O-acetyl-L-serine [CPD:C00979];
uracil [CPD:C00106]
Product
3-(uracil-1-yl)-L-alanine [CPD:C03584];
acetate [CPD:C00033]
Comment
The enzyme produces the non-proteinogenic amino acid L-willardiine, which is naturally found in the plants Acacia willardiana, Mimosa pigra, and Pisum sativum (pea). The enzyme from Pisum species also produces L-isowillardiine. Not identical with EC 2.5.1.47 cysteine synthase.
History
EC 2.5.1.53 created 1990 as EC 4.2.99.16, transferred 2002 to EC 2.5.1.53
Reference
1
  Authors
Ahmmad MAS, Maskall CS, Brown EG.
  Title
Partial-purification and properties of willardiine and synthase activity from Pisum sativum.
  Journal
Phytochemistry 23:265-270 (1984)
Reference
2
  Authors
Ikegami F, Kaneko M, Lambein F, Kuo Y-H, Murakoshi I.
  Title
Difference between uracilylalanine synthases and cysteine synthases in Pisum sativum.
  Journal
Phytochemistry 26:2699-2704 (1987)
Reference
3
  Authors
Murakoshi I, Ikegami F, Ookawa N, Ariki T, Haginiwa J, Kuo Y-H, Lambein F.
  Title
Biosynthesis of the uracilylalanines willardiine and isowillardiine in higher plants.
  Journal
Phytochemistry 17:1571-1576 (1978)
Other DBs
ExplorEnz - The Enzyme Database: 2.5.1.53
IUBMB Enzyme Nomenclature: 2.5.1.53
ExPASy - ENZYME nomenclature database: 2.5.1.53
BRENDA, the Enzyme Database: 2.5.1.53
CAS: 113573-73-2

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