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KMID : 0545120080180010104
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Journal of Microbiology and Biotechnology
2008 Volume.18 No. 1 p.104 ~ p.106
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Morphological Variation of Enterobacter sp. BL-2 in Acetate-mediated pH Environment for Excretive Production of Cationic Microbial Polyglucosamine Biopolymer
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Son Mi-Kyung
Hong Soo-Jung
Sagong Kuk-Hwa
Lee Yong-Hyun
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Abstract
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Enterobacter sp. BL-2 excretively produced unique cationic polyglucosamine biopolymer PGB-1 comprised of more than 95% D-glucosamine in an acetate-mediated culture condition. The excretion of the biopolymer PGB- was closely associated with the cellular morphology Enterobacter sp. BL-2, a feature highly dependable on the pH of the medium. The initially formed uneven and irregular surface cells were aggregated into the cell-biopolymer network structure connected by the adhesion modules of the cell-bound biopolymer. The excretive production of the biopolymer PGB-1 coincided with the disruption of the cell-biopolymer network, most actively at the medium pH of 8.0.
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KEYWORD
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Acetate-mediated pH control, cationic polyglucosamine biopolymer, cellular morphology, Enterobacter sp, BL-2, excretive production
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