A simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteria
Nitrile hydrolyzing enzymes catalyze the hydration of nitrile compounds to corresponding amides and acids. Bacteria, isolated from soil samples were screened for nitrile hydrolyzing enzymes by simple dye based 96 well plate and nesslerization method. Bromothymol blue was used as an indicator for the...
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Elsevier
2019-12-01
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| Series: | Biotechnology Reports |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2215017X19303625 |
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doaj-3dda5a94d2954de2aa05f504bd34d9f32020-11-25T02:16:35ZengElsevierBiotechnology Reports2215-017X2019-12-0124A simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteriaRuchi Sahu0Anil Kumar Meghavarnam1Savitha Janakiraman2Department of Microbiology and Biotechnology, Bangalore University, 560056, Bangalore, Karnataka, IndiaDepartment of Life Science, Bangalore University, 560056, Bangalore, Karnataka, IndiaDepartment of Microbiology and Biotechnology, Bangalore University, 560056, Bangalore, Karnataka, India; Corresponding author.Nitrile hydrolyzing enzymes catalyze the hydration of nitrile compounds to corresponding amides and acids. Bacteria, isolated from soil samples were screened for nitrile hydrolyzing enzymes by simple dye based 96 well plate and nesslerization method. Bromothymol blue was used as an indicator for the detection of amides and acids based on colour change of the indicator dye from blue to dark green or yellow. The screening assay also differentiates between nitrile hydratase (NHase) and nitrilase producing bacteria. Among the 108 bacterial strains screened for enzyme activity, six strains were positive for NHase activity and eleven strains were positive for nitrilase activity based on their ability to degrade acrylonitrile into products. The strain showing maximum NHase activity in quantitative assay was identified as Rhodococcus rhodochrous. The modified method developed by us would be useful for rapid screening of nitrile degrading bacteria potent for acrylamide/acrylic acid production when acrylonitrile is supplied as substrate. Keywords: Nitrile hydrolyzing enzymes, Bromothymol blue, Nitrile hydratase, Nitrilase, Rhodococcus rhodochroushttp://www.sciencedirect.com/science/article/pii/S2215017X19303625 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Ruchi Sahu Anil Kumar Meghavarnam Savitha Janakiraman |
| spellingShingle |
Ruchi Sahu Anil Kumar Meghavarnam Savitha Janakiraman A simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteria Biotechnology Reports |
| author_facet |
Ruchi Sahu Anil Kumar Meghavarnam Savitha Janakiraman |
| author_sort |
Ruchi Sahu |
| title |
A simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteria |
| title_short |
A simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteria |
| title_full |
A simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteria |
| title_fullStr |
A simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteria |
| title_full_unstemmed |
A simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteria |
| title_sort |
simple, efficient and rapid screening technique for differentiating nitrile hydratase and nitrilase producing bacteria |
| publisher |
Elsevier |
| series |
Biotechnology Reports |
| issn |
2215-017X |
| publishDate |
2019-12-01 |
| description |
Nitrile hydrolyzing enzymes catalyze the hydration of nitrile compounds to corresponding amides and acids. Bacteria, isolated from soil samples were screened for nitrile hydrolyzing enzymes by simple dye based 96 well plate and nesslerization method. Bromothymol blue was used as an indicator for the detection of amides and acids based on colour change of the indicator dye from blue to dark green or yellow. The screening assay also differentiates between nitrile hydratase (NHase) and nitrilase producing bacteria. Among the 108 bacterial strains screened for enzyme activity, six strains were positive for NHase activity and eleven strains were positive for nitrilase activity based on their ability to degrade acrylonitrile into products. The strain showing maximum NHase activity in quantitative assay was identified as Rhodococcus rhodochrous. The modified method developed by us would be useful for rapid screening of nitrile degrading bacteria potent for acrylamide/acrylic acid production when acrylonitrile is supplied as substrate. Keywords: Nitrile hydrolyzing enzymes, Bromothymol blue, Nitrile hydratase, Nitrilase, Rhodococcus rhodochrous |
| url |
http://www.sciencedirect.com/science/article/pii/S2215017X19303625 |
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