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