Galactinol—raffinose galactosyltransferase

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galactinol-raffinose galactosyltransferase
Identifiers
EC number 2.4.1.67
CAS number 37277-70-6
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 / QuickGO

In enzymology, a galactinol-raffinose galactosyltransferase (EC 2.4.1.67) is an enzyme that catalyzes the chemical reaction

alpha-D-galactosyl-(1→3)-1D-myo-inositol + raffinose myo-inositol + stachyose

Thus, the two substrates of this enzyme are α-D-galactosyl-(1→3)-1D-myo-inositol and raffinose, whereas its two products are myo-inositol and stachyose.

This enzyme participates in galactose metabolism.

Nomenclature[edit]

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:raffinose galactosyltransferase. Other names in common use include galactinol-raffinose galactosyltransferase, and stachyose synthetase.

References[edit]

  • Tanner W (1967). "Die Biosynthese der Stachyose". Ber. Dtsch. Bot. Ges. 80: 111. 
  • Tanner W, Kandler O (1968). "Myo-inositol, a cofactor in the biosynthesis of stachyose". Eur. J. Biochem. 4 (2): 233–9. PMID 5655499. doi:10.1111/j.1432-1033.1968.tb00199.x. 
  • 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. PMID 4774118. doi:10.1111/j.1432-1033.1973.tb03039.x. 
  • Preiss, J. (Ed.), The Biochemistry of Plants, vol. 3, Academic Press, New York, 1980, p. 221-270.