Biology:Glucomannan 4-beta-mannosyltransferase

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Short description: Class of enzymes
glucomannan 4-beta-mannosyltransferase
Identifiers
EC number2.4.1.32
CAS number37257-30-0
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

In enzymology, a glucomannan 4-beta-mannosyltransferase (EC 2.4.1.32) is an enzyme that catalyzes the chemical reaction

GDP-mannose + (glucomannan)n [math]\displaystyle{ \rightleftharpoons }[/math] GDP + (glucomannan)n+1

Thus, the two substrates of this enzyme are GDP-mannose and (glucomannan)n, whereas its two products are GDP and (glucomannan)n+1, a noncellulosic polysaccharide which is used in the formation of cell walls.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is GDPmannose:glucomannan 1,4-beta-D-mannosyltransferase. Other names in common use include GDP-man-beta-mannan manosyltransferase, and glucomannan-synthase.

References

  • "Biosynthesis of a cell wall glucomannan in mung bean seedlings". The Journal of Biological Chemistry 244 (6): 1608–16. March 1969. PMID 4304230. 
  • "UniProtKB - Q9LZR3 (CSLA9_ARATH)" UniProt database