Galactinol—sucrose galactosyltransferase

galactinol-sucrose galactosyltransferase
Identifiers
EC number	2.4.1.82
CAS number	62213-45-0
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / EGO
Search PMC articles PubMed articles NCBI proteins

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.

References

• 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 (1): 103–10. doi:10.1111/j.1432-1033.1973.tb03039.x. PMID 4774118.
• Lehle L, Tanner W, Kandler O (1970). "Myo-inositol, a cofactor in the biosynthesis of raffinose". Hoppe. Seylers. Z. Physiol. Chem. 351 (12): 1494–8. doi:10.1515/bchm2.1970.351.2.1494. PMID 5491608.