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Separation of the Cell Envelope for Gram-negative Bacteria into Inner and Outer Membrane Fractions with Technical Adjustments for Acinetobacter baumannii
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Separation of the Cell Envelope for Gram-negative Bacteria into Inner and Outer Membrane Fractions with Technical Adjustments for Acinetobacter baumannii

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A phylum level perspective on bacterial cell envelope architecture.

Iain C Sutcliffe1

  • 1Biomolecular and Biomedical Research Centre, School of Applied Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK. iain.sutcliffe@northumbria.ac.uk

Trends in Microbiology
|July 20, 2010
PubMed
Summary
This summary is machine-generated.

This study reveals that most bacterial phyla possess a diderm cell envelope with lipopolysaccharide. It also suggests Chloroflexi phylum members are typically monoderm, impacting bacterial classification.

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Area of Science:

  • Microbiology
  • Bacterial Cell Biology
  • Genomics

Background:

  • The bacterial phylogenetic tree now includes over 25 phyla.
  • Bacterial cell envelopes are crucial for classification, defined by one (monoderm) or two (diderm) membranes.
  • Lipopolysaccharide (LPS) is a key component of diderm envelopes.

Purpose of the Study:

  • To survey the diversity of bacterial cell envelope types across known phyla.
  • To investigate the distribution of lipopolysaccharide biosynthesis enzymes using comparative genomics.
  • To explore alternative diderm cell envelope architectures and their phylogenetic distribution.

Main Methods:

  • Comparative genomics analysis of available bacterial genome sequences.
  • Literature review of bacterial cell envelope structures and classifications.
  • Phylogenetic analysis of lipopolysaccharide biosynthesis enzymes.

Main Results:

  • The majority of bacterial phyla likely possess a diderm cell envelope containing lipopolysaccharide.
  • Key lipopolysaccharide biosynthesis enzymes show a widespread distribution across bacterial phyla.
  • Evidence suggests that members of the Chloroflexi phylum are typically monoderm.

Conclusions:

  • Bacterial cell envelope structure, particularly the presence of LPS, is a significant factor in understanding microbial diversity.
  • The classification of Chloroflexi as monoderm requires further investigation and may refine phylogenetic understanding.
  • Comparative genomics provides a powerful tool for exploring bacterial cell envelope evolution and diversity.