Zeatin 9-aminocarboxyethyltransferase

zeatin 9-aminocarboxyethyltransferase
Identifiers
EC number	2.5.1.50
CAS number	62683-23-2
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / EGO
Search PMC articles PubMed articles NCBI proteins

In enzymology, a zeatin 9-aminocarboxyethyltransferase (EC 2.5.1.50) is an enzyme that catalyzes the chemical reaction

O-acetyl-L-serine + zeatin $\rightleftharpoons$ lupinate + acetate

Thus, the two substrates of this enzyme are O-acetyl-L-serine and zeatin, whereas its two products are lupinate and acetate.

This enzyme belongs to the family of transferases, specifically those transferring aryl or alkyl groups other than methyl groups. The systematic name of this enzyme class is O3-acetyl-L-serine:zeatin 2-amino-2-carboxyethyltransferase. Other names in common use include beta-(9-cytokinin)-alanine synthase, beta-(9-cytokinin)alanine synthase, O-acetyl-L-serine acetate-lyase (adding N6-substituted adenine), lupinate synthetase, lupinic acid synthase, lupinic acid synthetase, and 3-O-acetyl-L-serine:zeatin 2-amino-2-carboxyethyltransferase.

References

• Entsch B, Parker CW and Letham DS (1983). "An enzyme from lupin seeds forming alanine derivatives of cytokinins". Phytochemistry 22 (2): 375–381. doi:10.1016/0031-9422(83)83008-8.
• Mok DWS and Mok MC (2001). "Cytokinin metabolism and action". Annu. Rev. Plant Physiol. Plant Mol. Biol. 52: 89–118. doi:10.1146/annurev.arplant.52.1.89. PMID 11337393.