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International Journal of Engineering، جلد ۲۶، شماره ۸، صفحات ۸۱۵-۸۲۰
عنوان فارسی
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عنوان انگلیسی Purification and Characterization of a Novel Thermostable and Acid Stable α-Amylase from Bacillus Sp. Iranian S1
چکیده انگلیسی مقاله This study reports the purification and biochemical characterization of thermostable and acidic-pH-stable α-amylase from Bacillus sp. Iranian S1 isolated from the desert soil (Gandom-e-Beryan in Lut desert, Iran). Amylase production was found to be growth associated. Maximum enzyme production was in exponential phase with activity 2.93 U ml-1 at 50°C and pH 5. The enzyme was purified by isopropanol sedimentation, ion-exchange chromatography on DEAE cellulose DE-52 and gel filtration on Sephadex G-100. The enzyme was purified to homogeneity with purification fold 98.9 with 25% yield and specific activity 375.9 U mg-1 of protein. The molecular weight of purified α-amylase was estimated to be 70 KDa by SDS-PAGE. The enzyme remained stable in a wide range of temperature and pH between 30°C- 110°C and 3-9, respectively. Assayed with soluble starch as substrate, the enzyme displayed optimal activity at 90°C and pH 5. The purified α-amylase was acid- and thermo-stable with novel properties making it suitable for many industrial purposes.
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نویسندگان مقاله YU Popov |
, Yerevan State University

A Terchunyan |
, Yerevan State University

Hovik Panosyan |
, Yerevan State University

Sorour sharifi |
Department of Microbiology, Plant and Microbe Biot, Yerevan State University

نشانی اینترنتی http://www.ije.ir/article_72153_92827a1f779ef1e5b8ea5e635456f7ce.pdf
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