Biology:Galactinol—sucrose galactosyltransferase
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Short description: Class of enzymes
| 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 / QuickGO | ||||||||
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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 [math]\displaystyle{ \rightleftharpoons }[/math] 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
- "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. 1973. doi:10.1111/j.1432-1033.1973.tb03039.x. PMID 4774118.
- "Myo-inositol, a cofactor in the biosynthesis of raffinose". Hoppe-Seyler's Z. Physiol. Chem. 351 (12): 1494–8. 1970. doi:10.1515/bchm2.1970.351.2.1494. PMID 5491608.
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