Rhamnogalacturonan galacturonohydrolase explained

Rhamnogalacturonan galacturonohydrolase
Ec Number:3.2.1.173

Rhamnogalacturonan galacturonohydrolase (RG-galacturonohydrolase) is an enzyme with systematic name rhamnogalacturonan oligosaccharide alpha-D-GalA-(1->2)-alpha-L-Rha galacturonohydrolase.[1] This enzyme catalyses the following chemical reaction

Exohydrolysis of the alpha-D-GalA-(1->2)-alpha-L-Rha bond in rhamnogalacturonan oligosaccharides with initial inversion of configuration releasing D-galacturonic acid from the non-reducing end of rhamnogalacturonan oligosaccharides.

The enzyme is part of the degradation system for rhamnogalacturonan I in Aspergillus aculeatus.

Notes and References

  1. Mutter M, Beldman G, Pitson SM, Schols HA, Voragen AG . Rhamnogalacturonan alpha-d-galactopyranosyluronohydrolase. An enzyme that specifically removes the terminal nonreducing galacturonosyl residue in rhamnogalacturonan regions of pectin . Plant Physiology . 117 . 1 . 153–63 . May 1998 . 9576784 . 34998 . 10.1104/pp.117.1.153 .