PLANT PHYSIOLOGY , Vol 110, Issue 1 73-77, Copyright © 1996 by American Society of Plant Biologists
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BIOCHEMISTRY AND ENZYMOLOGY |
Rhamnogalacturonase B from Aspergillus aculeatus Is a Rhamnogalacturonan [alpha]-L-Rhamnopyranosyl-(1->4)-[alpha]-D-Galactopyranosyluronide Lyase
M. Mutter, I. J. Colquhoun, H. A. Schols, G. Beldman and AGJ. Voragen
Wageningen Agricultural University, Department of Food Chemistry, Bomenweg 2, 6703 HD Wageningen, The Netherlands (M.M., H.A.S., G.B., A.G.J.V.)
The recently described rhamnogalacturonase B, which is able to degrade
ramified hairy regions of pectin, was found to be a rhamnogalacturonan
[alpha]-L-rhamnopyranosyl-(1->4)-[alpha]-D-galactopyranosyluronide
lyase. The cleavage site and mechanism differ from that of the previously
described rhamnogalacturonase A, which is a hydrolase and can now be termed
rhamnogalacturonan
[alpha]-D-galactopyranosyluronide-(1->2)-[alpha]-L-rhamnopyranosyl
hydrolase.