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Proteomic analysis of Bacillus anthracis Sterne vegetative cells
Anthony W Francis1, Christy E Ruggiero, Andrew T Koppisch
1Bioscience Division, Los Alamos National Laboratory, P.O. 1663, Los Alamos, NM 87545, USA.
Biochimica Et Biophysica Acta
|March 17, 2005
Summary
Researchers created a comprehensive proteomic catalog of vegetative Bacillus anthracis (anthrax) cells. This database aids in the rapid detection of anthrax pathogens using mass spectrometry and proteomics.
Area of Science:
- Microbiology
- Proteomics
- Biotechnology
Background:
- Mass spectrometry and proteomics are vital for rapid pathogen detection.
- Public proteomic databases enhance the identification of specific bacteria.
- Bacillus anthracis, the causative agent of anthrax, requires robust detection methods.
Purpose of the Study:
- To construct a comprehensive proteomic catalog of vegetative Bacillus anthracis Sterne cells.
- To support and improve proteomic detection analyses for anthrax.
- To provide a resource for understanding B. anthracis protein expression.
Main Methods:
- Utilized liquid chromatography tandem-mass spectrometry (LC-MS/MS).
- Employed three complementary pre-analytical separation techniques: molecular weight, isoelectric point, and cation exchange chromatography.
- Tryptic digestion of proteins followed by peptide separation and analysis.
Main Results:
- Identified 1048 unique proteins from vegetative B. anthracis Sterne cells.
- Cataloged protein locations: 694 cytosolic, 153 membrane, and 30 secreted.
- Characterized proteins functionally using the TIGR CMR database.
Conclusions:
- This study provides an extensive proteomic catalog for vegetative B. anthracis.
- Combined with spore proteomic data, it offers a thorough overview of B. anthracis protein expression in both active and dormant states.
- The catalog serves as a valuable resource for anthrax detection and research.