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Purification and characterization of a novel β-agarase of Paenibacillus sp. SSG-1 isolated from soil

Paper ID Volume ID Publish Year Pages File Format Full-Text
20340 43170 2014 5 PDF Available
Title
Purification and characterization of a novel β-agarase of Paenibacillus sp. SSG-1 isolated from soil
Abstract

Agar is a polysaccharide polymer material, generally extracted from seaweed. Most agar degradation strains were isolated from seawater. In order to find new species resources and novel agarase from soil, an agar-degrading bacterium Paenibacillus sp. SSG-1 was isolated from soil. Agarase SSG-1a was purified to homogeneity by 30.2 fold with a yield of 4.8% through ammonium sulfate precipitation, DEAE FF chromatography and native-PAGE separation. The tandem mass spectrometry (MS/MS) results indicated that purified SSG-1a should be a novel β-agarase. The molecular mass of SSG-1a was estimated to be 77 kDa. The optimal temperature and pH for SSG-1a were 50°C and pH 6.0, respectively. Moreover, SSG-1a was stable in pH range of 4.0–10.0 and at temperature up to 40°C. It could hydrolyze the β-1,4 linkage of agarose to produce neoagarohexaose (95 mol%) and neoagarooctaose (5 mol%). Metal ion Mn2+ and reducing reagents (β-Me and DTT) could increase its activity by 150% and 60%, respectively.

Keywords
Paenibacillus; Agarase; Neoagarohexaose; Native-PAGE separation; Protein purification
First Page Preview
Purification and characterization of a novel β-agarase of Paenibacillus sp. SSG-1 isolated from soil
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 118, Issue 2, August 2014, Pages 125–129
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering