Team:KAIT Japan/Project
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+ | <h2><span id="Project" class="style1">Project</span></h2> | ||
+ | <p class="style2"><strong>Back Ground</strong></p> | ||
+ | <p class="style3">Bacteria detect the concentration of its friends, | ||
+ | called Quorum Sensing, and the sensing system is one of the communication tools | ||
+ | between microbes. It is related also to formation of biofilm and to | ||
+ | pathogenicity. <br>As the Quorum Sensing of Gram-negative bacterias, | ||
+ | Acyl-Homoserine Lactone <br>(AHL ) is released to recognize each other. 2007, | ||
+ | the team of Chiba University made the vacteria production of aiia to decrease | ||
+ | the AHL.<br>We considered application of the system to make a colony layer on a | ||
+ | colony layer by<br>depressing of Quorum Sensing.</p> | ||
+ | <p class="style2"><strong>Purpose</strong></p> | ||
+ | <p class="style3">We make bacteria that have transgene of AiiA, and get | ||
+ | the bacteria to produce abundance of AiiA.The abundance of AiiA inhibit AHL,and | ||
+ | General, colony and colony don’t approach by AHL.<br>Our projects were done to | ||
+ | approach and overlap.</p> | ||
+ | <p class="style3"> </p> | ||
+ | <p class="style3"> </p> | ||
+ | <p class="style4"><span id="result_box" class="short_text" lang="en"><span class="hps"> | ||
+ | <h2 class="style1"><span id="Word" class="style1">Word</span></h2> | ||
+ | <p class="style5"><strong>Quorum Sensing</strong></p> | ||
+ | <p class="style3">Quorum sensing is a system of stimulus and response | ||
+ | correlated to population density. <br>Many species of bacteria use quorum | ||
+ | sensing to coordinate gene expression according to the density of their local | ||
+ | population. In similar fashion, some social insects use quorum sensing to | ||
+ | determine where to nest.</p> | ||
+ | <p class="style5"><strong>AHL and AiiA</strong></p> | ||
+ | <p class="style3">AHL is [N-] acyl-homoserine lactones. <br>AHL is a | ||
+ | small transmitter that is used in quorum sensing system autoinducer (AI) is | ||
+ | known as. AHL is present in many gram-negative bacteria<br>In low cell density, | ||
+ | AHL becomes low concentration, and AHL becomes high concentration in high cell | ||
+ | density. <br>At high cell densities, the AIs can accumulate to a concentration | ||
+ | sufficient for activation of related regulatory genes. Because the concentration | ||
+ | of AHL's is a key factor in determining virulence gene expression in several | ||
+ | pathogenic bacteria, it is possible to develop a strategy for disease control by | ||
+ | controlling production of AIs or eliminating AIs produced by pathogenic | ||
+ | bacteria.<br><br>AiiA, an enzyme that inactivates the acylhomoserine lactone | ||
+ | quorum-sensing signal.</p> | ||
+ | <p class="style5"><strong>Autoinducer </strong></p> | ||
+ | <p class="style3">Autoinducers are chemical signaling molecules that are | ||
+ | produced and used by bacteria participating in quorum sensing. </p> | ||
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Latest revision as of 02:19, 6 October 2011