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Purification and Characterization of Carbon–Phosphorus Bond-Cleavage Enzyme From Glyphosate Degrading Pseudomonas putida T5.

Arul Selvi, A. and Manonmani, H. K. (2015) Purification and Characterization of Carbon–Phosphorus Bond-Cleavage Enzyme From Glyphosate Degrading Pseudomonas putida T5. Preparative Biochemistry and Biotechnology, 45 (4). pp. 380-397.

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Abstract

An inducible, carbon-phosphorus bond-cleavage enzyme was purified from cells of Pseudomonas putida T5 grown on N-phosphonomethyl glycine. The native enzyme had a molecular mass of approximately 70 kD and upon sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), yielded a homogeneous protein band with an apparent molecular mass of about 70 kD. Activity of purified enzyme was increased by 627-fold compared to the crude extract and showed pH and temperature optima of approximately 7 and 30�C, respectively. The purified enzyme had an apparent Km and Vmax of 3.7mM and 6.8mM=min, respectively, for its sole substrate N-phosphonomethyl glycine. The enzyme was inhibited by phenylmethylsulfonyl fluoride (PMSF), indicating the presence of serine at the active site. The enzyme was not inhibited by SDS, suggesting the absence of disulfide linkage in the enzyme. The enzyme was found to be inhibited by most of the metals studied except Mg2þ. Detergents studied also inhibited glyphosate acting as a carbon–phosphorus bond-cleavage enzyme. Thus initial characterization of the purified enzyme suggested that it could be used as a potential candidate for glyphosate bioremediation.

Item Type: Article
Uncontrolled Keywords: bioremediation, carbon-phosphorus bond cleavage enzyme, glyphosate, N-phosphonomethyl glycine, Pseudomonas putida
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 26 Pesticide Chemistry
500 Natural Sciences and Mathematics > 05 Earth Sciences > 02 Soil Sciences
Divisions: Fermentation Technology and Bioengineering
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 17 Jun 2015 08:14
Last Modified: 17 Jun 2015 08:14
URI: http://ir.cftri.com/id/eprint/11836

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