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Updated: Jun 18, 2026

An Aquatic Microbial Metaproteomics Workflow: From Cells to Tryptic Peptides Suitable for Tandem Mass Spectrometry-based Analysis

An Aquatic Microbial Metaproteomics Workflow: From Cells to Tryptic Peptides Suitable for Tandem Mass Spectrometry-based Analysis

Published on: September 15, 2015

Two-dimensional proteome reference map for the radiation-resistant bacterium Deinococcus geothermalis.

Christina Liedert¹, Jörg Bernhardt, Dirk Albrecht

¹Bioprocess Engineering Laboratory, Department of Process and Environmental Engineering and Biocenter Oulu, University of Oulu, Linnanmaa, Oulu, Finland. christina.liedert@oulu.fi

|November 27, 2009

Summary

This summary is machine-generated.

This study mapped the proteins in Deinococcus geothermalis, identifying 299 unique proteins including V-type ATPase subunits and stress-related enzymes. These findings offer insights into the bacterium

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Area of Science:

Microbiology
Proteomics
Biochemistry

Background:

Deinococcus geothermalis is known for its extreme stress tolerance.
Understanding its proteome is crucial for elucidating survival mechanisms.

Purpose of the Study:

To construct reference maps for the cytosolic and cell envelope proteomes of Deinococcus geothermalis.
To identify proteins associated with stress tolerance and cellular functions.

Main Methods:

Two-dimensional gel electrophoresis (2-DE) was employed to separate and visualize proteins.
Mass spectrometry was used for protein identification.

Main Results:

A total of 403 protein spots were identified, corresponding to 299 unique proteins.
The cell envelope proteome included unique Deinococcus-specific proteins and V-type ATPase subunits.
The cytoplasmic proteome contained enzymes involved in metabolism, repair, and stress response.
34 abundant proteins with unknown functions were identified, potentially linked to stress tolerance.

Conclusions:

The proteomic maps provide a foundation for further research into Deinococcus geothermalis.
The identified proteins, particularly those of unknown function, may play key roles in the organism's extreme resilience.