Study of Bacillus spp. strains used in the production of -polyglutamic acid in submerged culture

Campos V., . and Pimentel Filho N. J., . and Medeiros T. A. M., . Study of Bacillus spp. strains used in the production of -polyglutamic acid in submerged culture. pp. 427-434. ISSN 2231-7546

Gamma-polyglutamic (-polyglutamic) acid has received considerable attention for environmental applications. -polyglutamic acid can be produced by fermenting soybeans and by submerged culture using the bacterium Bacillus subtilis. Although it is practically impossible to chemically synthesise -polyglutamic acid this biopolymer can be obtained through microbial culture. The microorganism most commonly used in the production of -polyglutamic acid among other strains is B. subtilis which has been investigated for the production of biopolymers. The purpose of the present work was to evaluate the production of -polyglutamic acid from submerged culture of different Bacillus strains. The evaluation of the efficiency of Bacillus strains in producing -polyglutamic acid indicated that B. Licheniformis produced a higher volume of the biopolymer than B. subtilis. The highest -polyglutamic acid production by B. licheniformis was 398.1 mg L-. B. licheniformis was found to be an L-glutamic acid-independent bacterium for the production of -polyglutamic acid. B. Licheniformis and B. subtilis growth and -polyglutamic acid production rates were also influenced by the culture media.

Full text available from: Official URL: http://www.ifrj.upm.edu.my/27%20(03)%202020/DONE%2...

Abstract

Gamma-polyglutamic (-polyglutamic) acid has received considerable attention for environmental applications. -polyglutamic acid can be produced by fermenting soybeans and by submerged culture using the bacterium Bacillus subtilis. Although it is practically impossible to chemically synthesise -polyglutamic acid this biopolymer can be obtained through microbial culture. The microorganism most commonly used in the production of -polyglutamic acid among other strains is B. subtilis which has been investigated for the production of biopolymers. The purpose of the present work was to evaluate the production of -polyglutamic acid from submerged culture of different Bacillus strains. The evaluation of the efficiency of Bacillus strains in producing -polyglutamic acid indicated that B. Licheniformis produced a higher volume of the biopolymer than B. subtilis. The highest -polyglutamic acid production by B. licheniformis was 398.1 mg L-. B. licheniformis was found to be an L-glutamic acid-independent bacterium for the production of -polyglutamic acid. B. Licheniformis and B. subtilis growth and -polyglutamic acid production rates were also influenced by the culture media.

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Item Type:	Article
AGROVOC Term:	Biopolymers
AGROVOC Term:	Biosynthesis
AGROVOC Term:	Fermentation
AGROVOC Term:	Soybeans
AGROVOC Term:	Microbial culture
AGROVOC Term:	Bacillus
AGROVOC Term:	Bacillus licheniformis
AGROVOC Term:	Bacillus subtilis
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9141

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