Gram-positive bacteriaRNPP familySummary Gram-positive bacteria can regulate gene expression at the population level via a mechanism known as quorum sensing. Oligopeptides serve as the signaling molecules; they are secreted and then are either detected at the bacterial surface by two-component...
QUORUMSENSINGINGRAMNEGATIVE&GRAMPOSITIVEBACTERIA •QuorumsensinginGram-negativebacteria-ThelanguageofLuxIandLuxRgenes.•QuorumsensinginGram-positivebacteria–Peptidemediatedquorumsensing.InGramnegativebacteria •Autoinducer–AHLorN-acylhomosernelactones.•ItissynthesizedbyaLuxIhomologueandaLuxRhomologue.Example1-...
Sign in to download full-size image Figure 7.2.Two-Component Quorum Sensing of Gram-Positive Bacteria. Autoinducer (AI) synthase is used to process and transport the proautoinducing peptides (pro-AIP) out of the cell. Once the concentration of AIP outside the cell is high, AIP binds to ...
Streptococcus pneumoniae becomes competent for genetic transformation when exposed to an autoinducer peptide known as competence-stimulating peptide (CSP). This peptide was originally described as a quorum-sensing signal, enabling individual cells to reg
This process results in the cell-density-dependent expression of the bioluminescence genes and eventually to the bioluminescence phenotype (Salmond et al., 1995). In Gram-positive bacteria the phenomenon of quorum sensing occurs in processes like development of genetic competence in Bacillus subtilis ...
A common form of quorum sensing in Gram-positive bacteria is mediated by peptides that act as phosphatase regulators (Phr) of receptor aspartyl phosphatases (Raps). In Bacillus subtilis, several Phr signals are integrated in sporulation phosphorelay signal transduction. We theoretically demonstrate that...
By integrating this with other environmental stimuli, bacteria are capable of exhibiting complex responses and take part in sophisticated interactions, allowing them to survive in most adverse environments. This chapter describes the molecular mechanisms of QS in Gram-negative and gram positive bacteria,...
(818 strains), microbial genes, and food items that link to hundreds of gut diseases and nutritional data. With regard to QS, repositories of limited QS systems in Gram-negative and Gram-positive bacteria have previously been curated to form SigMol29and Quorumpeps30, respectively. P2CS31,32...
In Gram-positive bacteria, other compounds, such as peptides, regulate cellular activity and behavior by sensing the cell density. The degradation of the signaling molecule—called quorum quenching—is probably another important integral part in the complex quorum sensing circuit. Most interestingly, ...
Several lactic acid bacteria produce peptides with antimicrobial activity. During the last few years, cell-cell communication has emerged as the key regula... LEN Quadri - Springer Netherlands 被引量: 128发表: 0年 Quorum sensing in Gram-positive bacteria Quorum sensing, a cell-density-dependent ...