Characterization of a novel chitinase from a moderately halophilic bacterium, Virgibacillus marismortui strain M3-23

Abstract

A new chitinase produced by the moderately halophilic bacterium Virgibacillus marismortui strain M3-23 was identified and characterized. Distinguishable characteristics of high activity and stability at different pH, temperatures and salinity of M3-23 chitinase are reported. Analysis of the catalytic domain sequence from the enzyme highlighted its relationship to glycosyl hydrolase family 18. Comparison of the deduced chitinase sequence from strain M3-23 to known chitinases from Bacillus species showed low similarity (82%), suggested its novelty. This is the first report of the characterization of chitinase from the species V. marismortui. The halo- and thermo-tolerant nature of the chitinolytic enzyme allows its potential use in agricultural and industrial applications. © Springer-Verlag and the University of Milan 2011.