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A broad pH range and processive chitinase from a metagenome library BJMBR
Thimoteo,S.S.; Glogauer,A.; Faoro,H.; de Souza,E.M.; Huergo,L.F.; Moerschbacher,B.M.; Pedrosa,F.O..
Chitinases are hydrolases that degrade chitin, a polymer of N-acetylglucosamine linked β(1-4) present in the exoskeleton of crustaceans, insects, nematodes and fungal cell walls. A metagenome fosmid library from a wastewater-contaminated soil was functionally screened for chitinase activity leading to the isolation and identification of a chitinase gene named metachi18A. The metachi18A gene was subcloned and overexpressed in Escherichia coli BL21 and the MetaChi18A chitinase was purified by affinity chromatography as a 6xHis-tagged fusion protein. The MetaChi18A enzyme is a 92-kDa protein with a conserved active site domain of glycosyl hydrolases family 18. It hydrolyses colloidal chitin with an optimum pH of 5 and temperature of 50°C. Moreover, the enzyme...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chitinase; Metagenomic; Aeromonas; Kinetics.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000100602
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