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A novel psychrotrophic, solvent tolerant Pseudomonas putida SKG-1 and solvent stability of its psychro-thermoalkalistable protease

Paper ID Volume ID Publish Year Pages File Format Full-Text
34902 45059 2011 6 PDF Available
Title
A novel psychrotrophic, solvent tolerant Pseudomonas putida SKG-1 and solvent stability of its psychro-thermoalkalistable protease
Abstract

It is the first time when psychrotrophic, solvent tolerant, psychro-thermoalkaline protease producing strain of Pseudomonas putida isolated from dairy sludge was capable of growing in the presence of 30% (v/v) organic solvents. The strain exhibited resistance against heavy metals (Cr6+, As3+, Pb2+, Cs1+) and various antibiotics. The isolate was able to grow at wide range of temperature (10–40 °C) with maximum growth at 25 °C. In glucose gelatin yeast extract (GGY) broth (pH 9.0 and 25 °C), the strain produced 514 U Protease ml−1. The presence of organic solvents n-dodecane, n-decane, isooctane and n-octane, enhanced the protease production. The protease was not only stable but also its activity enhanced in the presence of 25% (v/v) solvents n-dodecane, n-decane, isooctane, n-octane, n-hexane, n-butanol, n-heptane, cyclohexane and xylene, after prolonged incubation of fourteen days. The molecular weight of purified protease was ∼53 kDa as revealed by SDS-PAGE and activity gel analysis. The protease was active in broad pH and temperature range of 8.0–12.0 and 10–70 °C, respectively, with maxima at pH 9.5 and 40 °C. The unique property of solvent tolerance, antibiotic and heavy metal resistance proves the potential candidature of this isolate not only for peptide synthesis, but also for industrial use and bioremediation strategies involved in environmental clean up.

Keywords
Psychro-thermoalkaline protease; 16S rDNA; FAME analysis; Pseudomonas putida; Solvent stability
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A novel psychrotrophic, solvent tolerant Pseudomonas putida SKG-1 and solvent stability of its psychro-thermoalkalistable protease
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 46, Issue 7, July 2011, Pages 1430–1435
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us