Galacturan 1,4-alpha-galacturonidase
In enzymology, a galacturan 1,4-alpha-galacturonidase (EC 3.2.1.67) is an enzyme that catalyzes the chemical reaction
- (1,4-alpha-D-galacturonide)n + H2O
(1,4-alpha-D-galacturonide)n-1 + D-galacturonate
Thus, the two substrates of this enzyme are (1,4-alpha-D-galacturonide)n and H2O, whereas its two products are (1,4-alpha-D-galacturonide)n-1 and D-galacturonate.
This enzyme belongs to the family of hydrolases, specifically those glycosidases that hydrolyse O- and S-glycosyl compounds. The systematic name of this enzyme class is poly(1,4-alpha-D-galacturonide) galacturonohydrolase. Other names in common use include exopolygalacturonase, poly(galacturonate) hydrolase, exo-D-galacturonase, exo-D-galacturonanase, and exopoly-D-galacturonase. This enzyme participates in pentose and glucuronate interconversions and starch and sucrose metabolism.
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