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  • Title: Cloning and characterization of a novel GH44 family endoglucanase from mangrove soil metagenomic library.
    Author: Mai Z, Su H, Yang J, Huang S, Zhang S.
    Journal: Biotechnol Lett; 2014 Aug; 36(8):1701-9. PubMed ID: 24737084.
    Abstract:
    A novel endoglucanase gene, mgcel44, was isolated from a mangrove soil metagenomic library by functional-based screening. It encodes a 648-aa peptide with a catalytic domain of glycosyl hydrolase family 44. The deduced amino acid sequence of mgcel44 shares less than 50 % identity with endoglucanases in GenBank database. mgcel44 was cloned and overexpressed in Escherichia coli. The recombinant enzyme, MgCel44, has a molecular mass of 70.8 kDa as determined by SDS-PAGE. Its optimal pH and temperature for activity were 6 and 45 °C, respectively. It was highly active at 25-45 °C and pH 5-8. Its activity was enhanced in 0.5 M NaCl by >1.6-fold and stable up to 1.5 M NaCl. MgCel44 was resistant to several organic solvents and had high activity at 15 % (v/v) solvent after incubating for 24 h at 25 °C.
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