Related Experiment Video
Updated: May 16, 2026
03:29
Synthesis and Assay of Vibrio Quorum Sensing Inhibitors
Published on: May 31, 2024
Quorumpeps database: chemical space, microbial origin and functionality of quorum sensing peptides
Evelien Wynendaele1, Antoon Bronselaer, Joachim Nielandt
1Drug Quality and Registration (DruQuaR) group, Department of Pharmaceutical Analysis, Faculty of Pharmaceutical Sciences, Ghent Hospital University, Ghent B-9000, Belgium.
Nucleic Acids Research
|November 28, 2012
Summary
Quorum-sensing peptides are diverse signaling molecules. The Quorumpeps database organizes these oligopeptides, aiding in the development of new synthetic bioactive compounds.
Area of Science:
- Microbiology
- Biochemistry
- Bioinformatics
Background:
- Quorum-sensing (QS) peptides are crucial signaling molecules in microbial communities.
- These peptides exhibit significant structural diversity and are amenable to modifications that introduce new functionalities.
- Understanding QS peptide characteristics is vital for exploring their biological roles and potential applications.
Purpose of the Study:
- To create a structured overview of quorum-sensing oligopeptides.
- To provide a comprehensive resource for researchers studying QS peptides.
- To facilitate the development of novel synthetic bioactive compounds based on QS peptide structures.
Main Methods:
- Development of the Quorumpeps database (http://quorumpeps.ugent.be).
- Systematic collection and organization of data on QS oligopeptides.
- Inclusion of microbial origin, functionality, peptide linkages, and chemical characteristics (including 3D-structure-derived physicochemical properties).
Main Results:
- The Quorumpeps database offers a structured overview of QS oligopeptides.
- Detailed information on microbial origin, functionality, and chemical properties is available.
- The database highlights the extensive chemical diversity within QS signaling molecules.
Conclusions:
- The Quorumpeps database serves as a valuable resource for QS peptide research.
- The documented chemical diversity of QS peptides presents opportunities for designing new synthetic bioactive compounds.
- This resource supports advancements in synthetic biology and drug discovery.
Related Concept Videos
01:28Gene Regulation in Microbial Communities: Quorum Sensing
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
01:30Bacterial Signaling
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
01:28Global Regulatory Systems
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
01:29Biofilms
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
01:28Peptidoglycan Synthesis
Structure of PeptidoglycanPeptidoglycan is a vital structural component of the bacterial cell wall, providing mechanical strength and shape to the cell. It consists of repeating units of two sugars—N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)—linked by β-1,4 glycosidic bonds. These sugar chains are cross-linked by short peptide chains, forming a mesh-like polymer that surrounds the bacterial plasma membrane.Cytoplasmic Phase – Precursor SynthesisPeptidoglycan biosynthesis begins in...
01:28Regulation of Bacterial Virulence
Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...