Biology:Polygalacturonate 4-alpha-galacturonosyltransferase

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Short description: Class of enzymes
polygalacturonate 4-alpha-galacturonosyltransferase
Identifiers
EC number2.4.1.43
CAS number37277-53-5
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

In enzymology, a polygalacturonate 4-alpha-galacturonosyltransferase (EC 2.4.1.43) is an enzyme that catalyzes the chemical reaction

UDP-D-galacturonate + (1,4-alpha-D-galacturonosyl)n [math]\displaystyle{ \rightleftharpoons }[/math] UDP + (1,4-alpha-D-galacturonosyl)n+1

Thus, the two substrates of this enzyme are UDP-D-galacturonate and (1,4-alpha-D-galacturonosyl)n, whereas its two products are UDP and (1,4-alpha-D-galacturonosyl)n+1.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-D-galacturonate:1,4-alpha-poly-D-galacturonate 4-alpha-D-galacturonosyltransferase. Other names in common use include UDP galacturonate-polygalacturonate alpha-galacturonosyltransferase, uridine diphosphogalacturonate-polygalacturonate, and alpha-galacturonosyltransferase. This enzyme participates in starch and sucrose metabolism and nucleotide sugars metabolism.

Indications

Polygalacturonate salts can be used clinically to treat the GI reactions that are due to Quinidine.

References