Rhamnogalacturonan hydrolase (, ''rhamnogalacturonase A'', ''RGase A'', ''RG-hydrolase'') is an
enzyme
An enzyme () is a protein that acts as a biological catalyst by accelerating chemical reactions. The molecules upon which enzymes may act are called substrate (chemistry), substrates, and the enzyme converts the substrates into different mol ...
with
systematic name
A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are usually part of a nomenclature.
A semisystematic name or semitrivi ...
''rhamnogalacturonan alpha-D-GalA-(1->2)-alpha-L-Rha hydrolase''.
This enzyme
catalyses the following
chemical reaction
A chemical reaction is a process that leads to the chemistry, chemical transformation of one set of chemical substances to another. When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an Gibbs free energy, ...
: Endohydrolysis of alpha-D-GalA-(1->2)-alpha-L-Rha glycosidic bond in the
rhamnogalacturonan
Pectin ( ': "congealed" and "curdled") is a heteropolysaccharide, a structural polymer contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal chemical component of pectin is galacturo ...
I backbone with initial inversion of anomeric configuration releasing
oligosaccharides
An oligosaccharide (; ) is a saccharide polymer containing a small number (typically three to ten) of monosaccharides (simple sugars). Oligosaccharides can have many functions including cell recognition and cell adhesion.
They are normally presen ...
with beta-D-GalA at the reducing end.
The enzyme is part of the degradation system for rhamnogalacturonan I in ''
Aspergillus aculeatus
''Aspergillus aculeatus'' is a fungus species in the genus '' Aspergillus''. It has been implicated as the causative agent in plant disease. ''A. aculeatus'' belongs to the group of black ''Aspergilli'' which are important industrial workhorses. ...
''.
References
External links
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EC 3.2.1