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AssigneeBioleaders Corporation
InventorsMoonHee Sung, DaeHeoun Baek, SeungGoo Lee, JaeJun Song, SeungPyo Hong, YoonHo Choi, SunYoung Shin, JaeSuk Han, Makoto Ashiuchi, Kenji Soda
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Bacillus subtilis var. chungkookjang, accession no. KCTC 0697BP, a salt-resistant B. subtilis variant isolated from “chungkookjang,” a traditional Korean fermented soy bean paste. This B. subtilis variant produces poly-gamma-glutamic acid (or poly-gamma-glutamate, γ-PGA), an edible, soluble, anionic, and biodegradable high molecular-weight polymer. Bacillus subtilis var. chungkookjang produces γ-PGA with a higher molecular weight than other extracellular γ-PGAs derived from general Bacillus sp. strains. Accordingly, the γ-PGA produced by Bacillus subtilis var. chungkookjang can be utilized for the development of high value-added products, such as cosmetics, absorption agents, and biodegradable plastic materials.
A biologically pure culture of the strain Bacillus subtilis var. chungkookjang KCTC 0697BP, which produces γ-polyglutamic acid (γ-PGA) as a biodegradable polymer, is resistant to salt, hardly forms spores, does not contain any plasmids, and is obtained from the fermented soybean paste, chungkookjang.
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