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Semi-Quantitative Analysis of Peptidoglycan by Liquid Chromatography Mass Spectrometry and Bioinformatics
Published on: October 13, 2020
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Peptidoglycan in obligate intracellular bacteria
Christian Otten1, Matteo Brilli2, Waldemar Vollmer1
1The Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, NE2 4AX, UK.
Molecular Microbiology
|November 28, 2017
Summary
Obligate intracellular bacteria may reduce peptidoglycan to avoid host immune detection. A comparative analysis identified
Area of Science:
- Bacteriology
- Microbial Pathogenesis
- Evolutionary Biology
Background:
- Peptidoglycan is crucial for bacterial cell structure but can trigger host immune responses.
- Obligate intracellular bacteria reside in protected host cells, reducing the need for peptidoglycan.
- Reducing peptidoglycan can evade host immune detection and destruction.
Purpose of the Study:
- To analyze peptidoglycan metabolism genes in obligate intracellular bacteria.
- To identify bacterial groups based on peptidoglycan gene content.
- To understand the evolutionary pressures on peptidoglycan in intracellular bacteria.
Main Methods:
- Comparative genomics of genes involved in peptidoglycan metabolism.
- Analysis across major obligate intracellular bacterial species.
- Identification of gene signatures for peptidoglycan-intermediate organisms.
Main Results:
- Identified a 'peptidoglycan-intermediate' group including Chlamydiae, Orientia tsutsugamushi, Wolbachia, and Anaplasma marginale.
- Differentiated this group from peptidoglycan-negative and classical peptidoglycan-containing species.
- Revealed minimal enzymatic requirements for peptidoglycan synthesis in this group.
Conclusions:
- The peptidoglycan-intermediate group exhibits unique biological characteristics.
- Gene content reflects adaptations to intracellular lifestyles and immune evasion.
- Insights into the minimal machinery for peptidoglycan sacculus and septum formation.
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