Optimization of Nutrient Medium Composition for Alpha- Amylase Biosynthesis by Aspergillus Oryzae Pp

نویسندگان

  • V. Dacheva
  • D. Galabova
  • A. Atev
چکیده

In the production of industrial enzymes, filamentous fungi are attractive as cell factories because they can secrete large amounts of protein into the medium. Many important industrial enzymes such as amylases, lipases and cellulase are produced by fermentation of filamentous fungi. Aspergillus oryzae is well-known filamentous producer of alpha amylase and has GRAS status. In the present study an improvement of alpha amylase activity from Asprgillus oryzae PP was achieved by changes in medium components. Optimization of the nutrient composition of the fermentation medium was carried out by the method of complete factorial planning of experiment Box-Wilson plan.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Production of amylase in liquid culture by a strain of Aspergillus oryzae.

The effect of different media and pH on the formation of amylase by Aspergillus oryzae EI 212 is described. Depending upon the composition of the medium and growth conditions, the fungus was found to secrete alpha- or beta-amylase, or both. Some of the properties of the partially purified alpha-amylase were found to be different from alpha-amylases from other sources.

متن کامل

Alpha Amylase Production by Aspergillus Oryzae Using Solid State Fermentation

A fungal strain of Aspergillus oryzae was used for the production of alpha amylase by solid state fermentation from agro-industrial waste. Enzyme production was growth associated and maximum activity (8.23 U/ml) were obtained after 120h when incubated at 30°C on wheat bran with initial moisture content 60%; initial medium pH = 5 . Enzyme activity increased when the solid medium was supplemented...

متن کامل

Amylase production from Aspergillus oryzae LS1 by solid-state fermentation and its use for the hydrolysis of wheat flour

Nine Aspergillus and three of Trichoderma strains were grown on wheat bran (WB) medium under solid state fermentation (SSF) for amylase production. Aspergillus oryzae LS1 produced the highest level of the enzyme. The thermal stability profile of its crude enzyme revealed the half-life time of more than 2 h at 50 and 60ºC. The enzyme production was affected by strain type, incubation periods, le...

متن کامل

Presence of binding site for alpha-amylase and of masking protein for this site on mycelial cell wall of Aspergillus oryzae.

Mycelial cell wall of Aspergillus oryzae M-13 grown in an alpha-amylase-forming medium could not bind alpha-amylase (Taka-amylase A, EC 3.2.1.1). However, by treatment with 1.0 n NaOH at 100 C for 30 min, the wall gained the ability to bind alpha-amylase. This phenomenon was caused by removal of a factor (designated as masking factor) which masked the binding site for alpha-amylase. The masking...

متن کامل

Optimization of Cultural Conditions for the Production of Alpha Amylase by Wild and Mutant Strain of Aspergillus Oryzae in Stirred Fermenter

The present study deals the optimization of cultural conditions for the production of alpha amylase by Aspergillus oryzae IIB-30 and its mutant derivative A. oryzae EMS-18 in stirred fermenter. The time of fermentation for enzyme production by both wild and mutant strains was studied. It was found that the time required for maximal enzyme production (608 U/ml) in case of mutant strain was reduc...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2009