کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
69626 | 48782 | 2013 | 9 صفحه PDF | دانلود رایگان |

• A novel thermostable feruloyl esterase was purified and characterized.
• The enzyme was stable over a broad pH range and exhibited good thermostability.
• The enzyme exhibited strict substrate specificity for methyl ferulate.
• The feruloyl esterase gene was cloned and sequenced.
A feruloyl esterase from Chaetomium sp. CQ31 was purified and biochemically characterized. The purified feruloyl esterase had a specific activity of 38.6 U/mg. The molecular mass of the enzyme was estimated to be 30.2 kDa by SDS-PAGE, and 29.6 kDa by gel filtration, indicating that the enzyme was a monomer. The optimum pH and temperature of the enzyme were pH 7.5 and 60 °C, respectively. It was stable over a broad pH range of 4.0–10.0, and also exhibited good thermostability. The enzyme displayed strict substrate specificity. The Km and Vmax values for methyl ferulate were 0.98 μmol/min/mg and 42.6 U/mg, respectively. Furthermore, the feruloyl esterase gene was cloned and sequenced. Open reading frame (ORF) of the feruloyl esterase gene (879-bp) encodes 274 amino acids. The deduced amino acid sequence of the feruloyl esterase gene exhibited the highest identity (79%) with that of type B feruloyl esterase from Magnaporthe oryzae.
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Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 97, 15 December 2013, Pages 328–336