Proteomic characterization of Pseudomonas aeruginosa PAO1 inner membrane
Maria G Casabona1, Yves Vandenbrouck, Ina Attree
1INSERM, UMR-S 1036, Grenoble, France.
Abstract:
Pseudomonas aeruginosa is a Gram-negative bacterium that can inhabit a wide variety of environments and infect different hosts. Human infections by this microbe are nowadays perceived as a major health problem due notably to its multiresistance. The present data set provides the first description of P. aeruginosa inner membrane proteome. To achieve this, we combined efficient separation of membranes from PAO1 reference strain using discontinuous sucrose gradient centrifugation and MS-based proteomic analysis. A core list of 991 nonredundant proteins was established and analyzed in terms of trans-membrane domains, signal peptide, and lipobox sequence prediction. Furthermore, functional insights into membrane-spanning and membrane-associated protein complexes have been explored. All mass spectrometry data have been deposited in the ProteomeXchange with identifier PXD000107.
Insights
This study details the inner membrane proteome of Pseudomonas aeruginosa, identifying 991 proteins. This research provides a foundational understanding of the bacterium
Area of Science:
- Microbiology
- Proteomics
- Bacterial Pathogenesis
Background:
- Pseudomonas aeruginosa is a Gram-negative bacterium causing significant human health issues due to its multidrug resistance.
- Understanding the bacterial proteome is crucial for developing effective treatments.
Purpose of the Study:
- To provide the first comprehensive description of the Pseudomonas aeruginosa inner membrane proteome.
- To identify and characterize proteins within the bacterial inner membrane.
Main Methods:
- Separation of bacterial membranes using discontinuous sucrose gradient centrifugation.
- Mass spectrometry-based proteomic analysis of the isolated membranes.
- Bioinformatic analysis of identified proteins for functional domains.
Main Results:
- A core list of 991 nonredundant proteins from the P. aeruginosa inner membrane was established.
- Analysis included prediction of trans-membrane domains, signal peptides, and lipobox sequences.
- Exploration of functional insights into membrane-spanning and associated protein complexes.
Conclusions:
- This dataset offers a foundational resource for studying the P. aeruginosa inner membrane.
- The identified proteins and their predicted features are key to understanding bacterial function and host interaction.
- This work facilitates future research into P. aeruginosa pathogenesis and antimicrobial strategies.
