IUBMB Enzyme Nomenclature


Accepted name: sn-glycerol-3-phosphate 1-galactosyltransferase

Reaction: UDP-α-D-galactose + sn-glycerol 3-phosphate = UDP + 1-O-α-D-galactosyl-sn-glycerol 3-phosphate

Other name(s): isofloridoside-phosphate synthase; UDP-Gal:sn-glycero-3-phosphoric acid 1-α-galactosyl-transferase; UDP-galactose:sn-glycerol-3-phosphate α-D-galactosyltransferase; uridine diphosphogalactose-glycerol phosphate galactosyltransferase; glycerol 3-phosphate 1α-galactosyltransferase; UDP-galactose:sn-glycerol-3-phosphate 1-α-D-galactosyltransferase

Systematic name: UDP-α-D-galactose:sn-glycerol-3-phosphate 1-α-D-galactosyltransferase

Comments: The product is hydrolysed by a phosphatase to isofloridoside, which is involved in osmoregulation (cf. EC sn-glycerol-3-phosphate 2-α-galactosyltransferase).

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 9076-70-4


1. Kauss, H. and Quader, H. In vitro activation of a galactosyl transferase involved in the osmotic regulation of Ochromonas. Plant Physiol. 58 (1976) 295-298. [PMID: 16659666]

2. Kauss, H. and Schubert, B. First demonstration of UDP-gal:sn-glycero-3-phosphoric acid 1α-galactosyl-transferase and its possible role in osmoregulation. FEBS Lett. 19 (1971) 131-135. [PMID: 11946194]

[EC created 1978]

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