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- W1967431356 abstract "A glycosyl hydrolase family 5 endo-β-mannanase gene (man5F63) was cloned from Penicillium freii F63 and overexpressed in Pichia pastoris. man5F63 contained an open reading frame of 1260 bp that encoded a polypeptide of 419 amino acids including a putative 18-residue signal peptide. The recombinant enzyme (rMan5F63) was secreted into the culture supernatant to near electrophoretic homogeneity with a high yield (1.1 gl(-1) in flask). Its apparent molecular weight was approximately 72.0 kDa, 29.0 kDa higher than the theoretical molecular mass. rMan5F63 was optimal at pH 4.5 and 60 °C and exhibited good stability over a broad pH range from acidic to alkaline (>85.0% activity at pH 4.0-9.0, >70.0% activity at pH 10.0 and 43.7% even at pH 12.0). The activity of rMan5F63 was significantly enhanced in the presence of Co(2+), Cu(2+), Mn(2+) and β-mercaptoethanol and was strongly inhibited by Hg(2+) and SDS. The specific activity, K(m) and V(max) values were 47.5 U mg(-1), 7.8 mg ml(-1) and 70.4 μmol min(-1)mg(-1), respectively, for locust bean gum, and 40.3 U mg(-1), 2.3 mg ml(-1) and 61.7 μmol min(-1)mg(-1), respectively, for konjac flour. All these favorable enzymatic properties make it cost-effective to commercialization and valuable in various industries." @default.
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- W1967431356 date "2012-06-01" @default.
- W1967431356 modified "2023-10-01" @default.
- W1967431356 title "Cloning, over-expression and characterization of an alkali-tolerant endo-β-1,4-mannanase from Penicillium freii F63" @default.
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- W1967431356 doi "https://doi.org/10.1016/j.jbiosc.2012.02.005" @default.
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