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P2CS: updates of the prokaryotic two-component systems database.

Philippe Ortet1, David E Whitworth2, Catherine Santaella1

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Summary

The P2CS database now offers enhanced Prokaryotic Two-Component Systems (TCSs) analysis with new features for identifying signaling proteins and their evolutionary relationships. This resource aids in understanding prokaryotic behaviors and finding partners for orphan TCS proteins.

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Area of Science:

  • Microbiology
  • Bioinformatics
  • Systems Biology

Background:

  • Prokaryotic Two-Component Systems (TCSs) regulate essential cellular behaviors.
  • TCSs consist of receptor histidine kinases (HKs) and response regulators (RRs).
  • Identifying functional partners for orphan TCS proteins remains a challenge.

Purpose of the Study:

  • To update and enhance the P2CS database for comprehensive Prokaryotic Two-Component Systems analysis.
  • To introduce new features for protein analysis, visualization, and evolutionary studies.
  • To improve the identification of cognate partners for both paired and orphan TCS proteins.

Main Methods:

  • Database expansion to include 164,651 TCS proteins from 2758 prokaryotic genomes.
  • Integration of BLAST search, protein alignment (MUSCLE), and visualization (Jalview) tools.
  • Generation of annotated phylogenetic trees for HKs and RRs, including gene organization and domain architecture.

Main Results:

  • P2CS now provides paired HK and RR phylogenetic trees, highlighting proteins from the same genetic locus.
  • New features facilitate searching, analyzing homologous proteins, and exploring evolutionary relationships.
  • The database aids in identifying candidate partners for orphan TCS proteins.

Conclusions:

  • The updated P2CS database is a valuable resource for studying Prokaryotic Two-Component Systems.
  • Enhanced phylogenetic and gene organization data provide insights into TCS evolution.
  • The tool assists researchers in understanding prokaryotic signaling networks and identifying novel protein interactions.