Purification and characterization of a novel detergent- and organic solvent-resistant endo-beta-1,4-glucanase from a newly isolated basidiomycete Peniophora sp. NDVN01

Turkish Journal of Biology

DINH KHA TRINH¹ 

关键词: Characterization;    endoglucanase;    enzyme kinetics;    detergent- and organic solvent-resistant;    purification;    Peniophora sp. NDVN01;   

学科分类：生物科学（综合）

来源: Scientific and Technical Research Council of Turkey - TUBITAK

【 摘 要 】

A novel extracellular endoglucanase from a basidiomycete strain Peniophora sp. NDVN01 was purified 2.8-fold to homogeneity through ammonium sulfate precipitation and gel filtration with Bio-Gel P-100 and Sephadex G-75. The endoglucanase had a specific activity of 163.8 U/mg protein and a molecular mass of 32 kDa. Optimum temperature and pH were at 60 °C and 4.5, respectively. The enzyme was stable at up to 42 °C and in the pH range of 3.5-5.5 with a residual activity of over 80% for 24 h of treatment. Ni^2^+ activated but other metal ions showed no or slight inhibitory effect on the enzyme activity. The endoglucanase showed a high resistance to most tested detergents and organic solvents. The endoglucanase catalyzed the hydrolysis of barley \beta-glucan and carboxymethyl cellulose (CMC), but not toward xylan, locust bean gum, and Avicel, typical substrates for xylanase, mannanase and exoglucanase, respectively. The kinetic parameters K_m, V_{max}, K_{cat}, and K_{cat}/K_m for barley \beta-glucan and carboxymethyl cellulose were 5.9 mg/mL, 9804 U/mg, 6.14 × 105 min^{-1}, and 1.04 × 10^5 and 34.8 mg/mL, 1825 U/mg, 1.14 × 10^5 min^{-1}, and 0.33 × 10^4, respectively. Hydrolysis of CMC liberated cellobiose, cellotriose, cellotetraose, and a detectable amount of glucose. These results suggest that the endoglucanase might potentially be used in enzymatic reactions and to investigate the efficacy of feed enzymes.

【 授权许可】

Unknown