Galactinol—raffinose galactosyltransferase
| galactinol-raffinose galactosyltransferase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 2.4.1.67 | ||||||||
| CAS no. | 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. doi:10.1111/j.1432-1033.1968.tb00199.x. PMID 5655499.
- 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.
- Preiss, J. (Ed.), The Biochemistry of Plants, vol. 3, Academic Press, New York, 1980, p. 221-270.
