منابع مشابه
Quorum-sensing in Gram-negative bacteria.
It has become increasingly and widely recognised that bacteria do not exist as solitary cells, but are colonial organisms that exploit elaborate systems of intercellular communication to facilitate their adaptation to changing environmental conditions. The languages by which bacteria communicate take the form of chemical signals, excreted from the cells, which can elicit profound physiological ...
متن کاملStructure of PlcR: Insights into virulence regulation and evolution of quorum sensing in Gram-positive bacteria.
Gram-positive bacteria use a wealth of extracellular signaling peptides, so-called autoinducers, to regulate gene expression according to population densities. These "quorum sensing" systems control vital processes such as virulence, sporulation, and gene transfer. Using x-ray analysis, we determined the structure of PlcR, the major virulence regulator of the Bacillus cereus group, and obtained...
متن کاملQuorum sensing in bacteria.
Quorum sensing is the regulation of gene expression in response to fluctuations in cell-population density. Quorum sensing bacteria produce and release chemical signal molecules called autoinducers that increase in concentration as a function of cell density. The detection of a minimal threshold stimulatory concentration of an autoinducer leads to an alteration in gene expression. Gram-positive...
متن کاملVisualizing Bacteria Quorum Sensing
Large populations of bacteria communicate by sending into the environment some specific signalling molecules. A bacterium will sense the population density by the concentration of the signalling molecule. This process, known as “quorum sensing”, is used in this paper to show the emergent behaviour of a bacterium colony in various circumstances. The biochemistry associated with quorum sensing ha...
متن کاملQuorum sensing in Gram-negative bacteria: small-molecule modulation of AHL and AI-2 quorum sensing pathways.
Numerous species of bacteria employ a mechanism of intercellular communication known as quorum sensing. This signaling process allows the cells comprising a bacterial colony to coordinate their gene expression in a cell-density dependent manner.1-3 Quorum sensing is mediated by small diffusible molecules termed autoinducers that are synthesized intracellularly (throughout the growth of the bact...
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ژورنال
عنوان ژورنال: Japanese Journal of Lactic Acid Bacteria
سال: 2001
ISSN: 1343-327X
DOI: 10.4109/jslab1997.12.2