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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nisar, Muhammad Atif Rashid, Naeem Bashir, Qamar Gardner, Qurra-tul-Ann Afza Shafiq, Muhammad Hassan Akhtar, Muhammad |
| Description | Country affiliation: Pakistan Author Affiliation: Nisar MA ( School of Biological Sciences, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, Punjab, Pakistan.) |
| Abstract | Seven nicotinamide adenine dinucleotide oxidase homologs have been found in the genome of Thermococcus kodakaraensis. The gene encoding one of them, TK1299, consisted of 1326 nucleotides, corresponding to a polypeptide of 442 amino acids. To examine the molecular properties of TK1299, the structural gene was cloned, expressed in Escherichia coli and the gene product was characterized. Molecular weight of the recombinant protein was 49,375 Da when determined by matrix-assisted laser desorption/ionization time-of-flight and 300 kDa when analyzed by gel filtration chromatography indicating that it existed in a hexameric form. The enzyme was highly thermostable even in boiling water where it exhibited more than 95% of the enzyme activity after incubation of 150 min. TK1299 catalyzed the oxidation of NADH as well as NADPH and predominantly converted O2 to H2O (more than 75%). K(m) value of the enzyme towards NADH and NADPH was almost same (24 ± 2 µM) where as specific activity was higher with NADPH compared to NADH. To our knowledge this is the most thermostable and unique NAD(P)H oxidase displaying higher enzyme activity with NADPH. |
| File Format | HTM / HTML |
| ISSN | 13891723 |
| Issue Number | 1 |
| Volume Number | 116 |
| e-ISSN | 13474421 |
| Journal | Journal of Bioscience and Bioengineering |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-07-01 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biomedical Engineering Discipline Microbiology Nadph Oxidase Metabolism Nadp Thermococcus Enzymology Amino Acid Sequence Dinitrocresols Analysis Enzyme Stability Escherichia Coli Genetics Hydrogen-ion Concentration Molecular Sequence Data Chemistry Oxidation-reduction Sequence Homology, Amino Acid Temperature Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Bioengineering Applied Microbiology and Biotechnology Biotechnology |
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