During growth on xylan and xylose Thermoanaerobacterium saccharolyticum B6A-RI produced endoxylanase, beta-xylosidase, arabinofuranosidase, and acetyl esterase, and the first three activities appeared to be produced coordinately. During nonlimiting growth on xylan, these enzyme activities were predominantly cell associated; however, during growth on limiting concentrations of xylan, the majorit...

influenza c virus possesses specific neuraminate-o-acetylesterase as a receptor-destroying function. this enzymatic activity of the viral glycoprotein hef (hemagglutinin, esterase activity and fusion factor) can be visualized in situ by the use of distinct color substrates. hereby the localization, as well as the quantity of synthesized hef protein is detectable. we further developed the estera...

Soft rot (type II) fungi belonging to the family Xylariaceae are known to substantially degrade hardwood by means of their poorly understood lignocellulolytic system, which comprises various hydrolases, including feruloyl esterases and laccase. In the present study, several members of the Xylariaceae were found to exhibit high feruloyl esterase activity during growth on lignocellulosic material...

Carboxylesterases containing the sequence motif GGGX catalyze the hydrolysis of esters of chiral tertiary alcohols, albeit with only low to moderate enantioselectivity, for three model substrates (linalyl acetate, methyl-1-pentin-1-yl acetate, 2-phenyl-3-butin-2-yl acetate). In order to understand the molecular mechanism of enantiorecognition and to improve enantioselectivity for this interesti...

1 Commonwealth Scientific and Industrial Research Organisation, Division of Tropical Animal Production, Private Bag No. 3, PO Indooroopilly, QLD 4068, Australia * Commonwealth Scientific and Industrial Research Organisation, Division of Tropical Crops and Pastures, 306 Ca rmody Road, S t Lucia, QLD 4067, Australia Acetylesterase and cinnamoyl ester hydrolase activities were demonstrated in cult...

S-Succinylglutathione hydrolase, a new highly specific glutathione thiol esterase, has been purified from human liver. The preparation obtained is homogeneous according to disc electrophoretic and ultracentrifugal criteria and catalyzes the hydrolysis of 3000 pmol of Ssuccinylglutathione/min/mg of protein at 25°C. The enzyme has no activity toward nine other glutathione thiol esters tested or s...

Sir: We have demonstrated that aminopeptidases, phosphatases and esterases are located not only in cells but also on the cellular membrane of various kinds of animal cells1-3) and that inhibitors of these enzymes modified immune responses4,5). Among these inhibitors, bestatin, amastatin and forphenicine enhanced immune responses, but esterastin which inhibited esterase suppressed immune respons...