Mapping the hydrolytic and synthetic selectivity of a type C feruloyl esterase (StFaeC) from Sporotrichum thermophile using alkyl ferulates
摘要:
The active site of Sporotrichum thermophile type C feruloyl esterase (StFaeC) was probed using a series Of C-1-C-4 alkyl ferulates. The affinities for straight and branched alkyl ferulates were demonstrated by the K-m values of 1.64-0.51 and 0.19-0.1, respectively. Comparison of k(cat), and k(cat)/K-m values shows that the enzyme hydrolyzed n-propyl ferulate faster and iso-propyl ferulate more efficiently. Alkyl ferulates were applied also for substrate selectivity mapping of feruloyl esterase to catalyze feruloyl group transfer to L-arabinose, using as a reaction system a ternary water-organic mixture consisting of n-hexane, t-butanol and water. Lengthening the aliphatic side chain was the most significant factor causing lower synthetic activity of the enzyme. The reaction parameters affecting the feruloylation rate and the conversion of the enzymatic process, such as the temperature and substrate concentration have been investigated. Under identical reaction conditions, the enzyme feruloylated other monosaccharides such as D-arabinose, D-glucose, D-xylose, D-Mannose, D-fructose, D-galactose, D-ribose and model substrates such as 4-nitrophenyl alpha-L-arabinofuranoside and 4-nitrophenyl alpha-L-arabinopyranoside. (C) 2004 Elsevier Ltd. All rights reserved.
Mapping the hydrolytic and synthetic selectivity of a type C feruloyl esterase (StFaeC) from Sporotrichum thermophile using alkyl ferulates
摘要:
The active site of Sporotrichum thermophile type C feruloyl esterase (StFaeC) was probed using a series Of C-1-C-4 alkyl ferulates. The affinities for straight and branched alkyl ferulates were demonstrated by the K-m values of 1.64-0.51 and 0.19-0.1, respectively. Comparison of k(cat), and k(cat)/K-m values shows that the enzyme hydrolyzed n-propyl ferulate faster and iso-propyl ferulate more efficiently. Alkyl ferulates were applied also for substrate selectivity mapping of feruloyl esterase to catalyze feruloyl group transfer to L-arabinose, using as a reaction system a ternary water-organic mixture consisting of n-hexane, t-butanol and water. Lengthening the aliphatic side chain was the most significant factor causing lower synthetic activity of the enzyme. The reaction parameters affecting the feruloylation rate and the conversion of the enzymatic process, such as the temperature and substrate concentration have been investigated. Under identical reaction conditions, the enzyme feruloylated other monosaccharides such as D-arabinose, D-glucose, D-xylose, D-Mannose, D-fructose, D-galactose, D-ribose and model substrates such as 4-nitrophenyl alpha-L-arabinofuranoside and 4-nitrophenyl alpha-L-arabinopyranoside. (C) 2004 Elsevier Ltd. All rights reserved.
In order to discover new compounds with antiplatelet aggregation activities, some ferulic acid (FA) derivatives were designed and synthesized. The in vitro antiplatelet aggregation activities of these compounds were assessed by turbidimetric test. The results showed that the target compound 7f had potent antiplatelet aggregation activity with its IC50 27.6 μmol/L, and 7f can be regarded as a novel potent
(±)-trans-2-phenyl-2,3-dihydrobenzofurans as leishmanicidal agents: Synthesis, in vitro evaluation and SAR analysis
作者:Freddy A. Bernal、Marcel Gerhards、Marcel Kaiser、Bernhard Wünsch、Thomas J. Schmidt
DOI:10.1016/j.ejmech.2020.112493
日期:2020.11
(SI > 4.6). Nonetheless, structural optimization as further requirement was inferred from the high clearance of the most potent compound (8m) observed during determination in vitro of its metabolic stability. On the other hand, chiral separation of 8m and subsequent biological evaluation of its enantiomers demonstrated no effect of chirality on activity and cytotoxicity. Holistic analysis of in silico
Cinnamic, p-coumaric and ferulic acids were isolated from pineapple stems (Ananas comosus var. Cayenne). Twenty-four kinds of esters were prepared from these acids, alcohols and the components of Alpinia. Isopropyl 4-hydroxycinnamate (11) and butyl 4-hydroxycinnamate (12) were found to have almost the same effectiveness in antifungalactivity against Pythium sp. at 10 ppm as that of the commercial
A highly efficient synthesis of alkyl ferulates under microwave irradiation is described. The time of these reactions ranged from 3 to 5 minutes, which was much shorter than the traditional synthetic methods, and the alkyl ferulates were obtained in higher yields.