Gene involved in quorum-sensing system of acetic acid bacterium, acetic acid bacterium bred by modification of the gene and method for production of vinegar by using the acetic acid bacterium
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United States of America Patent
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Sep 3, 2013
Grant Date -
Jun 3, 2010
app pub date -
Jan 18, 2008
filing date -
Feb 23, 2007
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Abstract
The object of the present invention is to provide a method for efficiently producing vinegar that contains a higher concentration of acetic acid, wherein a gene involved in the acetic acid fermentation ability is obtained, the acetic acid fermentation ability of an acetic acid bacterium is improved by reducing or deleting the function of the protein encoded by the gene. An acetic acid bacterium with a remarkably improved acetic acid fermentation ability was obtained by obtaining genes encoding an acyl homoserine lactone synthase and an acyl homoserine lactone receptor-type transcription factor that are involved in the quorum-sensing system in the acetic acid bacterium, and modifying the genes so as to reduce or delete the function of the quorum-sensing system. Further provided is a method for more efficiently producing vinegar containing a higher concentration of acetic acid by using the acetic acid bacterium.
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