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Journal of Biosciences

, Volume 34, Issue 1, pp 21–26 | Cite as

Nitrilase-catalysed conversion of acrylonitrile by free and immobilized cells of Streptomyces sp.

  • V. K. Nigam
  • A. K. Khandelwal
  • R. K. Gothwal
  • M. K. Mohan
  • B. Choudhury
  • A. S. Vidyarthi
  • P. Ghosh
Article

Abstract

The biotransformation of acrylonitrile was investigated using thermophilic nitrilase produced from a new isolate Streptomyces sp. MTCC 7546 in both the free and immobilized state. Under optimal conditions, the enzyme converts nitriles to acids without the formation of amides. The whole cells of the isolate were immobilized in agar-agar and the beads so formed were evaluated for 25 cycles at 50°C. The enzyme showed a little loss of activity during reuse. Seventy-one per cent of 0.5 M acrylonitrile was converted to acid at 6 h of incubation at a very low density of immobilized cells, while 100% conversion was observed at 3 h by free cells.

Keywords

Aliphatic nitriles biotransformation immobilization nitrilase Streptomyces thermophilic 

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Copyright information

© Indian Academy of Sciences 2009

Authors and Affiliations

  • V. K. Nigam
    • 1
  • A. K. Khandelwal
    • 1
  • R. K. Gothwal
    • 1
  • M. K. Mohan
    • 1
  • B. Choudhury
    • 2
  • A. S. Vidyarthi
    • 3
  • P. Ghosh
    • 1
  1. 1.Birla Institute of Scientific ResearchJaipurIndia
  2. 2.Faculty of Biological ScienceIndian Institute of TechnologyRoorkeeIndia
  3. 3.Department of BiotechnologyBirla Institute of TechnologyMesra, RanchiIndia

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