Rhamnogalacturonan acetyltransferase (RGAE) is one of a group of enzymes produced by Aspergillus aculeatus to perform the synergistic degradation of rhamnogalacturonan, a complex polysaccharide found in pectic substances that constitute part of the middle lamella and the primary cell wall of higher plants. RGAE catalyses the deacylation of the backbone of rhamnogalacturonan, which is essential for the subsequent action of enzymes that cleave the glycosidic bonds and so degrade the polysaccharide. RGAE is a member of the carbohydrate esterase family 12, performing hydrolysis on an ester bond using a Ser-His-Asp catalytic triad.
Defined by 5 residues: SER:A-9GLY:A-42ASN:A-74ASP:A-192HIS:A-195