نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه بیوشیمی ،پژوهشکده زیست فناوری،دانشگاه ارومیه،ارومیه،ایران

2 استادیارﮔﺮﻭﻩ ﺯﻳﺴﺖ ﺷﻨﺎﺳﻲ،دانشکده علوم ،دانشگاه ارومیه،ارومیه،ایران.

3 استادیار دانشکده علوم دانشگاه پیام نور تهران

چکیده

آنزیم ترمولیزین (EC 3.4.24.4) آنزیم متالوپروتئیناز مقاوم به حرارت است که پیوند پپتیدی دارای آمینواسید آبگریز لوسین و فنیل آلانین را هیدرولیز می‌کند. افزایش برخی ترکیبات می‌تواند باعث پایداری این آنزیم شود. در این پژوهش اثر کربوکسی متیل سلولز به‌عنوان افزودنی بر عملکرد و پایداری ترمولیزین بررسی گردیده است. ابتدا در شرایط سنجش فعالت آنزیم بررسی شد و سپس اثر دما و اتانول بر روی فعالیت آنزیم موردبررسی قرار گرفت. بعدازآن اثر کربوکسی‌متیل سلولز با درصدهای 2، 4، 6، 8 و 10 درصد بر فعالیت ترمولیزین بررسی شد. نتایج نشان داد که پایداری ترمولیزین در مقابل افزایش دما ابتدا افزایش و سپس در دماهای خیلی بالا کاهش می‌یابد و الکل باعث ناپایدار شدن آنزیم می‌شود. کربوکسی متیل سلولز باعث افزایش فعالیت و پایداری آنزیم ترمولیزین می‌شود و حضور کربوکسی متیل سلولز می‌تواند باعث پایداری و مقاومت آنزیم ترمولیزین در برابر اتانول شود. ازاین‌رو استفاده از کربوکسی متیل سلولز می‌تواند برای افزایش فعالیت این آنزیم در حلال اتانول بکار رود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of the effect of CMC and alcohol and temperature on thermolysin enzyme stability

نویسندگان [English]

  • Amir Agheli kohne shahri 1
  • Yaghub Pazhang 2
  • fatemeh ghamari 3

1 Department of Biochemistry, Biotechnology Research Institute, Urmia University.Urmia.Iran.

2 Department of Biology, Faculty of Science, urmia University,Urmia,Iran.

3 Assistant professor Department of science payame noor university ,P.O.Box 19395-4697,Tehran,Iran

چکیده [English]

Thermolysin enzyme is a heat-resistant metalloproteinase enzyme that binds (EC 3.4.24.4) a peptide containing hydrophobic amino acid leucine and phenylalanine. This enzyme`s immobilization is very important. Enzyme immobilization enhances the stability and reuse of the enzyme and improves the properties of the enzyme and facilitates the enzyme readiness of the product. In order to study the adsorption in the presence of ethanol, different concentrations of ethanol were investigated with enzyme. To investigate the presence of CMC, the enzyme was mixed with different percentages of CMC solution and the casein (substrate) was mixed with different amounts. The effect of CMC and alcohol on the enzymatic solution of CMC was obtained. The effect of CMC and alcohol was investigated. The effect of CMC 2%, 4%, 6%, 8% and 10% with 1% casein on the enzyme was investigated. In this study, it was shown that thermolysin increases activity and stability against temperature rise and then decreases at very high temperatures, and alcohol causes enzyme instability. CMC increases the activity and stability of the thermolysin enzyme, but the presence of CMC can increase the stability and resistance of the thermolysin enzyme to alcohol. CMC has been shown to stabilize thermolysin.

کلیدواژه‌ها [English]

  • Enzyme Stability"
  • Thermolysin"
  • Carboxymethyl Cellulose"
  • "
  • Alcohol
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