Search for dissertations about: "quorum sensing"

Showing result 1 - 5 of 13 swedish dissertations containing the words quorum sensing.

2. 1. VanT, a central regulator of quorum sensing signalling in Vibrio anguillarum

   Author : Antony Croxatto; Debra Milton; Edward G Ruby; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Vibriosis; Vibrio anguillarum; quorum sensing; two-component phosphorelay systems; Molecular biology; Molekylärbiologi;

   Abstract : Many bacteria produce signal molecules that serve in a cell-to-cell communication system termed quorum sensing. This signalling system allows a bacterial population to co-ordinately regulate functions according to their cell number in a defined environment. READ MORE

4. 2. Stress response and virulence in Vibrio anguillarum

   Author : Barbara Weber; Debra L. Milton; James D. Oliver; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Vibrio anguillarum; quorum sensing; Type VI secretion; stress response; virulence; skin colonization; Molecular biology; Molekylärbiologi; molekylärbiologi; Molecular Biology;

   Abstract : Bacteria use quorum sensing, a cell to cell signaling mechanism mediated by small molecules that are produced by specific signal molecule synthases, to regulate gene expression in response to population density. In Vibrio anguillarum, the quorum-sensing phosphorelay channels information from three hybrid sensor kinases VanN, VanQ, CqsS that sense signal molecules produced by the synthases VanM, VanS and CqsA, onto the phosphotransferase VanU, to regulate activity of the response regulator VanO. READ MORE

5. 3. Cell-to-cell communication and virulence in Vibrio anguillarum

   Author : Kristoffer Lindell; Debra Milton; Karl Klose; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; vibrio anguillarum; quorum sensing; stress response; keratocyte; molekylärbiologi; Molecular Biology;

   Abstract : Quorum sensing (QS) is a type of cell-to-cell communication that allows the bacteria to communicate via small molecules to coordinate activities such as growth, biofilm formation, virulence, and stress response as a population. QS depends on the accumulation of signal molecules as the bacterial population increases. READ MORE

6. 4. Functional characterization of the small antisense RNA MicA in Escherichia coli

   Author : Klas Ifeanyi Udekwu; Gerhart Wagner; Tony Romeo; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; small RNA; antisense; outer membrane; Hfq-dependence; RNase III; LuxS; Quorum sensing; Microbiology; Mikrobiologi; mikrobiologi; Microbiology;

   Abstract : The Escherichia coli small RNA (sRNA) MicA was identified recently in a genomewide search for sRNAs. It is encoded between the genes gshA and luxS in E. coli and its close relatives. The function of sRNAs in bacteria is generally believed to be in maintenance of homeostasis via stress-induced modulation of gene expression. READ MORE

7. 5. Too close for comfort : The role of Contact-Dependent growth Inhibition (CDI) in interbacterial competition and cooperation

   Author : Marcus Wäneskog; Sanna Koskiniemi; Paul Rainey; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; bacterial interactions; cell-cell binding; contact-dependent growth inhibition; CDI; CdiB; CdiA; CdiI; outer-membrane receptor; BamA; OmpC; OmpF; extracellular toxin delivery; Toxin-Antitoxin; TA-system; persister cells; stress tolerance; stress response; rpoS; rssB; quorum sensing; multicellular behavior; Biologi med inriktning mot mikrobiologi; Biology with specialization in Microbiology;

   Abstract : Contact-Dependent growth inhibition (CDI) was discovered in 2005 in the E. coli isolate EC93. Since then our knowledge of CDI systems and their impact on bacterial communities have increased exponentially. READ MORE