Rhamnogalacturonan rhamnohydrolase

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Rhamnogalacturonan rhamnohydrolase
Identifiers
EC no.3.2.1.174
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Rhamnogalacturonan rhamnohydrolase (EC 3.2.1.174, RG-rhamnohydrolase, RG alpha-L-rhamnopyranohydrolase) is an enzyme with systematic name rhamnogalacturonan oligosaccharide alpha-L-Rha-(1->4)-alpha-D-GalA rhamnohydrolase.[1][2] This enzyme catalyses the following chemical reaction

Exohydrolysis of the alpha-L-Rha-(1->4)-alpha-D-GalA bond in rhamnogalacturonan oligosaccharides with initial inversion of configuration releasing beta-L-rhamnose from the non-reducing end of rhamnogalacturonan oligosaccharides.

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

References

  1. ^ Pitson SM, Mutter M, van den Broek LA, Voragen AG, Beldman G (January 1998). "Stereochemical course of hydrolysis catalysed by alpha-L-rhamnosyl and alpha-D-galacturonosyl hydrolases from Aspergillus aculeatus". Biochemical and Biophysical Research Communications. 242 (3): 552–9. doi:10.1006/bbrc.1997.8009. PMID 9464254.
  2. ^ Mutter M, Beldman G, Schols HA, Voragen AG (September 1994). "Rhamnogalacturonan alpha-L-rhamnopyranohydrolase. A novel enzyme specific for the terminal nonreducing rhamnosyl unit in rhamnogalacturonan regions of pectin". Plant Physiology. 106 (1): 241–50. doi:10.1104/pp.106.1.241. PMC 159522. PMID 7972516.

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