Article
The acid/base catalyst in the exoglucanase/xylanase from Cellulomonas fimi is glutamic acid 127: evidence from detailed kinetic studies of mutants.
Biochemistry - 24 May 1994
MacLeod A M, Lindhorst T, Withers S G, Warren R A
Abstract excerpt
The exoglucanase/xylanase Cex from Cellulomonas fimi hydrolyzes beta-1,4-glycosidic bonds with net retention of anomeric configuration, releasing the disaccharides beta-cellobiose or beta-xylobiose. It uses a double-displacement mechanism involving a glycosyl-enzyme intermediate which is formed and hydrolyzed with general acid/base catalytic assistance. Glu127 was proposed as the acid/base catalyst on the basis...
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