Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic Nesterenkonia isolate
| dc.contributor.author | Nel, A J M | |
| dc.contributor.author | Tuffin, I M | |
| dc.contributor.author | Sewell, B T | |
| dc.contributor.author | Cowan, D A | |
| dc.date.accessioned | 2016-07-26T09:49:24Z | |
| dc.date.available | 2016-07-26T09:49:24Z | |
| dc.date.issued | 2011 | |
| dc.date.updated | 2016-07-26T09:45:22Z | |
| dc.description.abstract | Nesterenkonia strain AN1 was isolated from a screening program for nitrile- and amide-hydrolyzing microorganisms in Antarctic desert soil samples. Strain AN1 showed significant 16S rRNA sequence identity to known members of the genus. Like known Nesterenkonia species, strain AN1 was obligately alkaliphilic (optimum environmental pH, 9 to 10) and halotolerant (optimum environmental Na content, 0 to 15% [wt/vol]) but was also shown to be an obligate psychrophile with optimum growth at approximately 21°C. The partially sequenced genome of AN1 revealed an open reading frame (ORF) encoding a putative protein member of the nitrilase superfamily, referred to as NitN (264 amino acids). The protein crystallized readily as a dimer and the atomic structure of all but 10 amino acids of the protein was determined, confirming that the enzyme had an active site and a fold characteristic of the nitrilase superfamily. The protein was screened for activity against a variety of nitrile, carbamoyl, and amide substrates and was found to have only amidase activity. It had highest affinity for propionamide but demonstrated a low catalytic rate. NitN had maximal activity at 30°C and between pH 6.5 and 7.5, conditions which are outside the optimum growth range for the organism. | en_ZA |
| dc.identifier | http://dx.doi.org/10.1128/AEM.02726-10 | |
| dc.identifier.apacitation | Nel, A. J. M., Tuffin, I. M., Sewell, B. T., & Cowan, D. A. (2011). Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic Nesterenkonia isolate. <i>Applied and Environmental Microbiology</i>, http://hdl.handle.net/11427/20749 | en_ZA |
| dc.identifier.chicagocitation | Nel, A J M, I M Tuffin, B T Sewell, and D A Cowan "Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic Nesterenkonia isolate." <i>Applied and Environmental Microbiology</i> (2011) http://hdl.handle.net/11427/20749 | en_ZA |
| dc.identifier.citation | Nel, A. J. M., Tuffin, I. M., Sewell, B. T., & Cowan, D. A. (2011). Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic Nesterenkonia isolate. Applied and environmental microbiology, 77(11), 3696-3702. | en_ZA |
| dc.identifier.issn | 0099-2240 | en_ZA |
| dc.identifier.ris | TY - Journal Article AU - Nel, A J M AU - Tuffin, I M AU - Sewell, B T AU - Cowan, D A AB - Nesterenkonia strain AN1 was isolated from a screening program for nitrile- and amide-hydrolyzing microorganisms in Antarctic desert soil samples. Strain AN1 showed significant 16S rRNA sequence identity to known members of the genus. Like known Nesterenkonia species, strain AN1 was obligately alkaliphilic (optimum environmental pH, 9 to 10) and halotolerant (optimum environmental Na content, 0 to 15% [wt/vol]) but was also shown to be an obligate psychrophile with optimum growth at approximately 21°C. The partially sequenced genome of AN1 revealed an open reading frame (ORF) encoding a putative protein member of the nitrilase superfamily, referred to as NitN (264 amino acids). The protein crystallized readily as a dimer and the atomic structure of all but 10 amino acids of the protein was determined, confirming that the enzyme had an active site and a fold characteristic of the nitrilase superfamily. The protein was screened for activity against a variety of nitrile, carbamoyl, and amide substrates and was found to have only amidase activity. It had highest affinity for propionamide but demonstrated a low catalytic rate. NitN had maximal activity at 30°C and between pH 6.5 and 7.5, conditions which are outside the optimum growth range for the organism. DA - 2011 DB - OpenUCT DP - University of Cape Town J1 - Applied and Environmental Microbiology LK - https://open.uct.ac.za PB - University of Cape Town PY - 2011 SM - 0099-2240 T1 - Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic Nesterenkonia isolate TI - Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic Nesterenkonia isolate UR - http://hdl.handle.net/11427/20749 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/20749 | |
| dc.identifier.uri | http://aem.asm.org/content/77/11/3696.short | |
| dc.identifier.vancouvercitation | Nel AJM, Tuffin IM, Sewell BT, Cowan DA. Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic Nesterenkonia isolate. Applied and Environmental Microbiology. 2011; http://hdl.handle.net/11427/20749. | en_ZA |
| dc.language | eng | en_ZA |
| dc.publisher | American Society for Microbiology | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.source | Applied and Environmental Microbiology | en_ZA |
| dc.source.uri | http://aem.asm.org/ | |
| dc.title | Unique aliphatic amidase from a psychrotrophic and haloalkaliphilic Nesterenkonia isolate | en_ZA |
| dc.type | Journal Article | en_ZA |
| uct.type.filetype | Text | |
| uct.type.filetype | Image | |
| uct.type.publication | Research | en_ZA |
| uct.type.resource | Article | en_ZA |