EC - Galactinol—raffinose galactosyltransferase

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IntEnz Enzyme Nomenclature


Accepted name:
galactinol—raffinose galactosyltransferase
Other names:
galactinol-raffinose galactosyltransferase
stachyose synthetase
α-D-galactosyl-(1→3)-myo-inositol:raffinose galactosyltransferase
Systematic name:
α-D-galactosyl-(1→3)-1D-myo-inositol:raffinose galactosyltransferase



This enzyme also catalyses galactosyl transfer from stachyose to raffinose (shown by labelling) [4]. For synthesis of the substrate, see EC, inositol 3-α-galactosyltransferase. See also EC, galactinol—sucrose galactosyltransferase.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , DIAGRAM , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , NIST 74 , UniPathway
Structural data: CSA , EC2PDB
Gene Ontology: GO:0047268
CAS Registry Number: 37277-70-6


  1. Tanner, W.
    Die Biosynthese der Stachyose.
    Ber. Dtsch. Bot. Ges. 80: 111 (1967).
  2. Tanner, W. and Kandler, O.
    Myo-inositol, a cofactor in the biosynthesis of stachyose.
    Eur. J. Biochem. 4: 233-239 (1968). [PMID: 5655499]
  3. Lehle, L. and Tanner, W.
    The function of myo-inositol in the biosynthesis of raffinose. Purification and characterization of galactinol:sucrose 6-galactosyltransferase from Vicia faba seeds.
    Eur. J. Biochem. 38: 103-110 (1973). [PMID: 4774118]
  4. Kandler, O. and Hopf, H.
    Occurrence, metabolism and function of oligosaccharides.
    In: Preiss, J. (Ed.) The Biochemistry of Plant vol. 3, Academic Press, New York, 1980, 221-270

[EC created 1972, modified 2003]