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beta-Amylase production by some Bacillus cereus, Bacillus megaterium and Bacillus polymyxa [correction of polymaxa]

S Niziołek1

  • 1Department of Biochemistry, Warsaw Agricultural University, Poland.

Acta Microbiologica Polonica
|January 1, 1997
PubMed

Insights

Bacillus polymyxa strains efficiently produce extracellular beta-amylase using a cost-effective medium. This enzyme is valuable for industrial applications, with strain NCIB 8524 showing the most potential.

Area of Science:

  • Microbiology
  • Enzymology
  • Biotechnology

Background:

  • Extracellular beta-amylase is an important industrial enzyme.
  • Optimizing microbial production is key for cost-effective enzyme applications.

Purpose of the Study:

  • To investigate extracellular beta-amylase production by Bacillus strains.
  • To identify optimal media and conditions for high-yield enzyme production.

Main Methods:

  • Cultivation of Bacillus cereus, Bacillus megaterium, and Bacillus polymyxa strains.
  • Testing various media compositions, including nutrient broth and a semi-synthetic medium.
  • Evaluating enzyme yields (U/mL) and stability under different conditions.

Main Results:

  • Bacillus polymyxa strains yielded up to 20.4 U/mL of beta-amylase.
  • Bacillus polymyxa produced high yields on a cost-effective semi-synthetic medium.
  • Enzyme produced in nutrient broth was unstable, likely due to proteases.

Conclusions:

  • Bacillus polymyxa, particularly strain NCIB 8524, is a promising source of extracellular beta-amylase.
  • A semi-synthetic medium with soybean extract is suitable for efficient and stable beta-amylase production.
  • Optimized cultivation conditions can enhance enzyme yield for biotechnological applications.

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