Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-10334
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Main Title: Discovery and Characterization of a New Cold-Active Protease From an Extremophilic Bacterium via Comparative Genome Analysis and in vitro Expression
Author(s): Perfumo, Amedea
Saß, Georg Johannes Freiherr von
Nordmann, Eva-Lena
Budisa, Nediljko
Wagner, Dirk
Type: Article
Language Code: en
Abstract: Following a screening of Antarctic glacier forefield-bacteria for novel cold-active enzymes, a psychrophilic strain Psychrobacter sp. 94-6PB was selected for further characterization of enzymatic activities. The strain produced lipases and proteases in the temperature range of 4–18°C. The coding sequence of an extracellular serine-protease was then identified via comparative analysis across Psychrobacter sp. genomes, PCR-amplified in our strain 94-6PB and expressed in the heterologous host E. coli. The purified enzyme (80 kDa) resulted to be a cold-active alkaline protease, performing best at temperatures of 20–30°C and pH 7-9. It was stable in presence of common inhibitors [β-mercaptoethanol (β-ME), dithiothreitol (DTT), urea, phenylmethylsulfonyl fluoride (PMSF) and ethylenediaminetetraacetic acid (EDTA)] and compatible with detergents and surfactants (Tween 20, Tween 80, hydrogen peroxide and Triton X-100). Because of these properties, the P94-6PB protease may be suitable for use in a new generation of laundry products for cold washing. Furthermore, we assessed the microdiversity of this enzyme in Psychrobacter organisms from different cold habitats and found several gene clusters that correlated with specific ecological niches. We then discussed the role of habitat specialization in shaping the biodiversity of proteins and enzymes and anticipate far-reaching implications for the search of novel variants of biotechnological products.
URI: https://depositonce.tu-berlin.de/handle/11303/11453
http://dx.doi.org/10.14279/depositonce-10334
Issue Date: 13-May-2020
Date Available: 22-Jun-2020
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Subject(s): bioprospecting
extremophilic bacteria
cold-active enzymes
genome mining
heterologous protein expression
microdiversity
Sponsor/Funder: EC/H2020/657473/EU/Life at its Extremes: Biodiversity and Activity of Microorganisms in deep Permafrost/BioFrost
EC/H2020/764591/EU/Synthetic Circuits for Robust Orthogonal Production/SynCrop
DFG, 5472008, SPP 1158: Bereich Infrastruktur - Antarktisforschung mit vergleichenden Untersuchungen in arktischen Eisgebieten
License: https://creativecommons.org/licenses/by/4.0/
Journal Title: Frontiers in Microbiology
Publisher: Frontiers Media S.A.
Publisher Place: Lausanne
Volume: 11
Article Number: 881
Publisher DOI: 10.3389/fmicb.2020.00881
EISSN: 1664-302X
Appears in Collections:FG Biokatalyse » Publications

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