We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Characterization of a novel halotolerant esterase from Chromohalobacter canadensis isolated from salt well mine.
- Authors
Wang, Mou; Ai, Li; Zhang, Mengping; Wang, Fengqing; Wang, Chuan
- Abstract
A esterase gene was characterized from a halophilic bacterium Chromohalobacter canadensis which was originally isolated from a salt well mine. Sequence analysis showed that the esterase, named as EstSHJ2, contained active site serine encompassed by a conserved pentapeptide motif (GSSMG). The EstSHJ2 was classified into a new lipase/esterase family by phylogenetic association analysis. Molecular weight of EstSHJ2 was 26 kDa and the preferred substrate was p-NP butyrate. The EstSHJ2 exhibited a maximum activity at 2.5 M NaCl concentration. Intriguingly, the optimum temperature, pH and stability of EstSHJ2 were related to NaCl concentration. At 2.5 M NaCl concentration, the optimum temperature and pH of EstSHJ2 were 65 ℃ and pH 9.0, and enzyme remained 81% active after 80 ℃ treatment for 2 h. Additionally, the EstSHJ2 showed strong tolerance to metal ions and organic solvents. Among these, 10 mM K+, Ca2+ , Mg2+ and 30% hexane, benzene, toluene has significantly improved activity of EstSHJ2. The EstSHJ2 was the first reported esterase from Chromohalobacter canadensis, and may carry considerable potential for industrial applications under extreme conditions.
- Subjects
SALT mining; ORGANIC solvents; ORGANOMETALLIC compounds; INDUSTRIAL capacity; MOLECULAR weights; TOLUENE
- Publication
3 Biotech, 2020, Vol 10, Issue 10, pN.PAG
- ISSN
2190-572X
- Publication type
Article
- DOI
10.1007/s13205-020-02420-0