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Isolation and Chemical Characterization of Lipid A from Gram-negative Bacteria
Published on: September 16, 2013
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Bacterial aminoacyl phospholipids - Biosynthesis and role in basic cellular processes and pathogenicity.
Christoph Slavetinsky1, Sebastian Kuhn1, Andreas Peschel1
1Interfaculty Institute of Microbiology and Infection Medicine, Infection Biology, University of Tübingen, 72076 Tübingen, Germany; German Centre for Infection Research (DZIF), Partner Site Tübingen, 72076 Tübingen, Germany.
Biochimica Et Biophysica Acta. Molecular and Cell Biology of Lipids
|December 13, 2016
Summary
Bacteria resist cationic antimicrobial peptides by modifying their cell membranes with positively charged aminoacyl phospholipids. This process, exemplified by Staphylococcus aureus
Area of Science:
- Microbiology
- Biochemistry
- Molecular Biology
Background:
- Bacterial cell membranes control molecular exchange and environmental interactions.
- Cytoplasmic membranes contain targets for antimicrobial agents.
- Cationic antimicrobial peptides (CAMPs) target negatively charged phospholipids (phosphatidylglycerol [PG], cardiolipin [CL]).
Purpose of the Study:
- To review the occurrence, synthesis, and function of bacterial aminoacyl phospholipids (aaPLs).
- To explore the role of aaPLs in cellular processes and pathogenicity.
- To highlight the mechanism of bacterial resistance to CAMPs via membrane modification.
Main Methods:
- Literature review focusing on MprF and aaPGSs.
- Analysis of lipid modification pathways in bacteria.
- Examination of the structural and functional roles of aaPLs.
Main Results:
- Bacteria resist CAMPs by aminoacylating membrane phospholipids (PG, CL) with positively charged amino acids.
- The Multiple Peptide Resistance Factor (MprF) is a key enzyme in synthesizing and translocating lysyl phosphatidylglycerol (LysPG).
- aaPLs contribute to membrane surface charge modulation, impacting antimicrobial peptide interactions.
Conclusions:
- Aminoacyl phospholipids are crucial for bacterial defense against cationic antimicrobials.
- MprF-mediated lipid modification is a significant virulence and resistance factor.
- Understanding aaPLs offers insights into bacterial survival strategies and potential therapeutic targets.
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