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Related Concept Videos

Proteomics01:33

Proteomics

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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Identification of Protein Interaction Partners in Mammalian Cells Using SILAC-immunoprecipitation Quantitative Proteomics
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Analyzing Persister Proteomes with SILAC and Label-Free Methods.

Bork A Berghoff1

  • 1Institute for Microbiology and Molecular Biology, Justus Liebig University Giessen, Giessen, Germany. bork.a.berghoff@mikro.bio.uni-giessen.de.

Methods in Molecular Biology (Clifton, N.J.)
|September 30, 2021
PubMed
Summary

This study presents mass spectrometry methods to analyze bacterial persister cells and their recovery. These techniques illuminate the unique physiology of persister cells, crucial for understanding antibiotic resistance.

Keywords:
Label-free quantificationMass spectrometryPersister cellsPostantibiotic recoveryProteomicsSILAC

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Area of Science:

  • Proteomics
  • Microbiology
  • Mass Spectrometry

Background:

  • Persister cells are a subpopulation of bacteria exhibiting transient, multidrug tolerance.
  • Understanding persister cell physiology is critical for combating persistent infections.
  • Current methods for persister analysis are limited.

Purpose of the Study:

  • To describe mass spectrometry-based methods for analyzing bacterial persister proteomes.
  • To investigate protein biosynthesis in persister cells.
  • To characterize persister proteomes during postantibiotic recovery.

Main Methods:

  • Isolation of persister cells using beta-lactam antibiotics.
  • Stable Isotope Labeling by Amino Acids in Cell Culture (SILAC) for quantifying protein biosynthesis.
  • Label-free quantification for analyzing proteomes during postantibiotic recovery.

Main Results:

  • Demonstration of SILAC for assessing protein synthesis in persister cells.
  • Characterization of proteome changes during the postantibiotic recovery phase.
  • Successful application of mass spectrometry for persister proteome analysis.

Conclusions:

  • The described mass spectrometry methods are effective for studying persister cell physiology.
  • These methods provide valuable insights into the molecular mechanisms underlying persister cell survival and recovery.
  • Further research can build upon these techniques to develop novel therapeutic strategies against persistent bacterial infections.