Reaction: UDP-α-D-galactose + myo-inositol = UDP + O-α-D-galactosyl-(1→3)-1D-myo-inositol
For diagram of reaction click here.
Glossary: galactinol = 3-O-α-D-galactosyl-1D-myo-inositol
Other name(s): UDP-D-galactose:inositol galactosyltransferase; UDP-galactose:myo-inositol 1-α-D-galactosyltransferase; UDPgalactose:myo-inositol 1-α-D-galactosyltransferase; galactinol synthase; inositol 1-α-galactosyltransferase; uridine diphosphogalactose-inositol galactosyltransferase; GolS; UDP-galactose:myo-inositol 3-α-D-galactosyltransferase
Systematic name: UDP-α-D-galactose:myo-inositol 3-α-D-galactosyltransferase
Comments: An enzyme from plants involved in the formation of raffinose and stachyose [cf. EC 2.4.1.67 (galactinol—raffinose galactosyltransferase) and EC 2.4.1.82 (galactinol—sucrose galactosyltransferase)].
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 79955-89-8
References:
1. Pharr, D.M., Sox, H.N., Locy, R.D. and Huber, S.C. Partial characterization of the galactinol forming enzyme from leaves of Cucumis sativus L. Plant Sci. Lett. 23 (1981) 25-33.