Galactinol-sucrose galactosyltransferase

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In enzymology, a galactinol-sucrose galactosyltransferase (EC 2.4.1.82) is an enzyme that catalyzes the chemical reaction

alpha-D-galactosyl-(1->3)-1D-myo-inositol + sucrose $\rightleftharpoons$ myo-inositol + raffinose

Thus, the two substrates of this enzyme are [[alpha-D-galactosyl-(1->3)-1D-myo-inositol]] and sucrose, whereas its two products are myo-inositol and raffinose.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is alpha-D-galactosyl-(1->3)-myo-inositol:sucrose 6-alpha-D-galactosyltransferase. Other names in common use include 1-alpha-D-galactosyl-myo-inositol:sucrose, and 6-alpha-D-galactosyltransferase. This enzyme participates in galactose metabolism.

[edit] References

IUBMB entry for 2.4.1.82
BRENDA references for 2.4.1.82 (Recommended.)
PubMed references for 2.4.1.82
PubMed Central references for 2.4.1.82
Google Scholar references for 2.4.1.82
Lehle L, Tanner W (1973). "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: 103–10. PMID 4774118.
Lehle L, Tanner W, Kandler O (1970). "Myo-inositol, a cofactor in the biosynthesis of raffinose". Hoppe. Seylers. Z. Physiol. Chem. 351: 1494–8. PMID 5491608.