zeatin 9-aminocarboxyethyltransferase;
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;
3-O-acetyl-L-serine:zeatin 2-amino-2-carboxyethyltransferase

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)

O3-acetyl-L-serine:zeatin 2-amino-2-carboxyethyltransferase

O-acetyl-L-serine + zeatin = lupinate + acetate [RN:R03133]

R03133

O-acetyl-L-serine [CPD:C00979];
zeatin [CPD:C00371]

The enzyme acts not only on zeatin but also on other N6-substituted adenines. The reaction destroys their cytokinin activity and forms the corresponding 3-(adenin-9-yl)-L-alanine.

1

Entsch, B., Parker, C.W. and Letham, D.S.

An enzyme from lupin seeds forming alanine derivatives of cytokinins.

Phytochemistry 22 (1983) 375-381.

2

Mok, D.W.S. and Mok, M.C.

Cytokinin metabolism and action.

Ann. Rev. Plant Physiol. Plant Mol. Biol. 52 (2001) 89-118.