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Transgenic soybean expressing a thermostable phytase as substitution for feed additive phytase.


ABSTRACT: Phytase is one of the most effective feed additives to increase the availability of phosphorus and minerals by catalyzing the hydrolysis of phytic acid. A modified appA gene (mappA) was transformed into soybean (Glycine max) under the control of a seed-specific promoter from common bean (Phaselous vulgaris). The soybean recombinant phytase showed optimal activity at pH 4.5 and 70?°C. A slight increase in enzyme activity occurred when the recombinant enzyme was pre-incubated with n-hexane. In addition, the phytase activity from our transgenic soybean does not reduce even after 2?hours of extraction with n-hexane at 55~65?°C. In conclusion, the oil extraction process using n-hexane does not inactivate the phytase expressed in the mAppA transgenic soybean, and the meal derived from the transgenic soybean processing can be used as feed supplement to livestock.

SUBMITTER: Zhao Y 

PROVIDER: S-EPMC6779883 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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Transgenic soybean expressing a thermostable phytase as substitution for feed additive phytase.

Zhao Yu Y   Zhu Lixia L   Lin Chaoyang C   Shen Zhicheng Z   Xu Chao C  

Scientific reports 20191007 1


Phytase is one of the most effective feed additives to increase the availability of phosphorus and minerals by catalyzing the hydrolysis of phytic acid. A modified appA gene (mappA) was transformed into soybean (Glycine max) under the control of a seed-specific promoter from common bean (Phaselous vulgaris). The soybean recombinant phytase showed optimal activity at pH 4.5 and 70 °C. A slight increase in enzyme activity occurred when the recombinant enzyme was pre-incubated with n-hexane. In add  ...[more]

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