Isolation and characterization of a novel endoglucanase from a Bursaphelenchus xylophilus metagenomic library.

ABSTRACT: A novel gene (designated as cen219) encoding endoglucanase was isolated from a Bursaphelenchus xylophilus metagenomic library by functional screening. Sequence analysis revealed that cen219 encoded a protein of 367 amino acids. SDS-PAGE analysis of purified endoglucanase suggested that Cen219 was a monomeric enzyme with a molecular mass of 40 kDa. The optimum temperature and pH for endoglucanase activity of Cen219 was separately 50 °C and 6.0. It was stable from 30 to 50 °C, and from pH 4.0 to 7.0. The activity was significantly enhanced by Mn(2+) and dramatically reduced by detergent SDS and metals Fe(3+), Cu(2+) or Hg(2+). The enzyme hydrolyzed a wide range of β-1, 3-, and β-1, 4-linked polysaccharides, with varying activities. Activities towards microcrystalline cellulose and filter pap

SUBMITTER: Zhang L 

PROVIDER: S-EPMC3873927 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature