NDLI: Characterization of bioimprinted tannase and its kinetic and thermodynamics properties in synthesis of propyl gallate by transesterification in anhydrous medium.

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Characterization of bioimprinted tannase and its kinetic and thermodynamics properties in synthesis of propyl gallate by transesterification in anhydrous medium.

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Characterization of bioimprinted tannase and its kinetic and thermodynamics properties in synthesis of propyl gallate by transesterification in anhydrous medium.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Nie, Guangjun Zheng, Zhiming Gong, Guohong Zhao, Genhai Liu, Yan Song, Junying Dai, Jun
Description	Country affiliation: China Author Affiliation: Nie G ( Key Lab of Ion Beam Bioengineering, Chinese Academy of Science, 230031 Hefei, China. ngjason@ahpu.edu.cn)
Abstract	Tannase has been extensively applied to synthesize gallic acid esters. Bioimprinting technique can evidently enhance transesterification-catalyzing performance of tannase. In order to promote the practical utilization of the modified tannase, a few enzymatic characteristics of the enzyme and its kinetic and thermodynamics properties in synthesis of propyl gallate by transesterification in anhydrous medium have been studied. The investigations of pH and temperature found that the imprinted tannase holds an optimum activity at pH 5.0 and 40 °C. On the other hand, the bioimprinting technique has a profound enhancing effect on the adapted tannase in substrate affinity and thermostability. The kinetic and thermodynamic analyses showed that the modified tannase has a longer half-time of 1,710 h at 40 °C; the kinetic constants, the activation energy of reversible thermal inactivation, and the activation energy of irreversible thermal inactivation, respectively, are 0.054 mM, 17.35 kJ mol(-1), and 85.54 kJ mol(-1) with tannic acid as a substrate at 40 °C; the free energy of Gibbs (ΔG) and enthalpy (ΔH) were found to be 97.1 and 82.9 kJ mol(-1) separately under the same conditions.
File Format	HTM / HTML
ISSN	02732289
Issue Number	8
Volume Number	167
e-ISSN	15590291
Journal	Applied Biochemistry and Biotechnology
Language	English
Publisher	Springer
Publisher Date	2012-08-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Biochemistry Discipline Biotechnology Carboxylic Ester Hydrolases Chemistry Propyl Gallate Biocatalysis Chemical Synthesis Genetics Metabolism Enzyme Stability Esterification Hydrogen-ion Concentration Kinetics Molecular Imprinting Tannins Temperature Thermodynamics Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Biology Environmental Engineering Biochemistry Bioengineering Applied Microbiology and Biotechnology Biotechnology

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