Abstract
By constructing a genomic library, an endoglucanase gene (cel9P) was cloned from Paenibacillus sp. BME-14 which was isolated from the sea. It had an open-reading frame of 1,629 bp, encoding a peptide of 542-amino acid residue with a calculated molecular mass of 60 kDa. The enzyme showed the highest amino acid identity of 52% with other known endoglucanases and had a C-terminal catalytic domain belonging to the glycosyl hydrolases family 9. The optimum pH and temperature for enzymatic activity was pH 6.5 and 35 °C. The metal ions of Ca2+, Mg2+, and Mn2+ had a positive effect on the activity while Hg2+, Cu2+, and EDTA had a negative effect. Notably, Cel9P had 65% of the maximal activity at 5 °C. Based on the special characteristic of Cel9P, it had a potential significance for study of cold-active mechanism and industry applications.
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This work was supported by grants from the National Natural Sciences Foundation of China (30770021 and 30570057) and the 111 project (B07041).
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Fu, X., Liu, P., Lin, L. et al. A Novel Endoglucanase (Cel9P) From a Marine Bacterium Paenibacillus sp. BME-14. Appl Biochem Biotechnol 160, 1627–1636 (2010). https://doi.org/10.1007/s12010-009-8648-2
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DOI: https://doi.org/10.1007/s12010-009-8648-2