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  • acetoin production enhanced by manipulating carbon flux in a newly isolated bacillus amyloliquefaciens

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 676
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -

    a new strain, fmme044, exhibited a remarkable ability to synthesize acetoin and was identified as bacillus amyloliquefaciens. the following characteristics of enzyme activity were found: 2,3-butanediol was reverse transformed to acetoin upon depletion of glucose; lower agitation speeds favored 2,3-butanediol accumulation; and higher agitation speeds favored reverse transformation of 2,3-butanediol to acetoin. in order to enhance acetoin production by manipulating the carbon flux distribution, a two-stage agitation speed control strategy was proposed: during the first 24 h, the agitation speed was set to 350 rpm to achieve a high 2,3-butanediol concentration and then the speed was increased to 500 rpm to reverse transform 2,3-butanediol to acetoin. following this strategy, a high titer (51.2 g l−1), yield (0.43 g g−1), and productivity (1.42 g l−1 h−1) of acetoin were achieved. the results demonstrated that b. amyloliquefaciens fmme044 is a potential industrial strain for acetoin production.

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