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Improved Thermostable α-amylase Activity of Bacillus Amyloliquefaciens by Low-Energy Ion Implantation

Improved Thermostable α-amylase Activity of Bacillus Amyloliquefaciens by Low-Energy Ion Implantation

X Y Li, J L Zhang, S W Zhu

Genet Mol Res. 2011 Sep 23;10(3):2181-9.

PMID: 21968725

Abstract:

Thermostable α-amylase is of great importance in the starch fermentation industry; it is extensively used in the manufacture of beverages, baby foods, medicines, and pharmaceuticals. Bacillus amyloliquefaciens produces thermostable α-amylase; however, production of thermostable α-amylase is limited. Ion-beam implantation is an effective method for mutation breeding in microbes. We conducted ion-beam implantation experiments using two different ions, Ar(+) and N(+), to determine the survival rate of and dose effect on a high α-amylase activity strain of B. amyloliquefaciens that had been isolated from soil samples. N(+) implantation resulted in a higher survival rate than Ar(+) implantation. The optimum implantation dose was 2.08 × 10(15) ions/cm(2). Under this implantation condition, we obtained a thermally and genetically stable mutant α-amylase strain (RL-1) with high enzyme activity for degrading α-amylase. Compared to the parental strain (RL), the RL-1 strain had a 57.1% increase in α-amylase activity. We conclude that ion implantation in B. amyloliquefaciens can produce strains with increased production of thermostable α-amylase.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9000855-B	α-Amylase from Bacillus amyloliquefaciens		9000-85-5	Price

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