A novel gene encoding thermostable endoglucanase was identified in Xanthomonas sp. EC102 from soil. The gene had 1,458 base pairs of open reading frame, which encode a 52-kDa protein of 486 amino acid residues. Sequence of the amino acid residues was similar with the endoglucanase from Xanthomonas campestris pv. campestris ATCC33913 (GenBank Accession No. NP-638867.1) (94 % identity). The endoglucanase was overexpressed in Escherichia coli BL21 and purified. Temperature for the highest enzymatic activity was 70 °C and pH optima was pH 5.5. The specific activity of the endoglucanase toward carboxymethylcellulose (CMC) was approximately 2 μmol -min-1 mg-1, Vmax for CMC was 1.44 μmol mg-1 min-1, and Km values was 25.6 mg mL-1. The EC102 endoglucanase was stable at temperatures up to 60 °C, and it was activated by 0.1 mM of Mn2+ and Co2+. This is the first report about thermostable endoglucanase from Xanthomonas sp. © Springer Science+Business Media New York 2014.
CITATION STYLE
Woo, M. H., Chang, Y. H., Lee, H. S., Pak, P. J., Kim, J. S., & Chung, N. (2014). First Thermostable Endo-β-1,4-Glucanase from Newly Isolated Xanthomonas sp. EC102. Protein Journal, 33(1), 110–117. https://doi.org/10.1007/s10930-013-9535-9
Mendeley helps you to discover research relevant for your work.