Abstract
Nitrilases are commercial biocatalysts used for the synthesis of plastics, paints, fibers in the chemical industries, pharmaceutical drugs and herbicides for agricultural uses. Nitrilase hydrolyses the nitriles and dinitriles to their corresponding carboxylic acids and ammonia. They have a broad range of substrate specificities as well as enantio-, regio- and chemo-selective properties which make them useful for biotransformation of nitriles to important compounds because of which they are considered as ‘Green Catalysts’. Nitriles are widespread in nature and synthesized as a consequence of anthropogenic and biological activities. These are also present in certain plant species and are known to cause environmental pollution. Biotransformation using native organisms as catalysts tends to be insufficient since the enzyme of interest has very low amount in the total cellular protein, rate of reaction is slow along with the instability of enzymes. Therefore, to overcome these limitations, bioengineering offers an alternative approach to alter the properties of enzymes to enhance the applicability and stability. The present review highlights the aspects of producing the recombinant microorganisms and overexpressing the enzyme of interest for the enhanced stability at high temperatures, immobilization techniques, extremes of pH, organic solvents and hydrolysing dintriles to chiral compounds which may enhance the possibilities for creating specific enzymes for biotransformation.
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Acknowledgements
Tesnim Arfi duly acknowledges Senior Research Fellowship of Moulana Azad National Fellowship, U. G. C, Government of India (F1-17.1/2012-13/MANF-2012-13-MUS-JHA-9035), New Delhi, India for pursuing Ph.D.
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Nigam, V.K., Arfi, T., Kumar, V. et al. Bioengineering of Nitrilases Towards Its Use as Green Catalyst: Applications and Perspectives. Indian J Microbiol 57, 131–138 (2017). https://doi.org/10.1007/s12088-017-0645-5
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DOI: https://doi.org/10.1007/s12088-017-0645-5