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Determination of Bacterial Protein Profiles by Matrix-assisted Laser Desorption/Ionization Mass Spectrometry with High-performance Liquid Chromatography

✍ Scribed by Xiaoli Liang; Kefei Zheng; Masrk G. Qian; David M. Lubman

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
774 KB
Volume
10
Category
Article
ISSN
0951-4198

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✦ Synopsis

A rapid method for profiling bacterial mil cellular proteins has been developed using a combination of capillary high-performance liquid chromatography separation followed by (MALDI-MS) matrix-assisted laser desorptionl ionization mass spectrometric analysis. In this method, bacteria are sonicated, the cell walls broken, and the water-soluble proteins precipitated for analysis. The proteins are separated by capillary liquid chromatography and detected on-line by a UV absorption detector. The eluents are then collected for off-line analysis by MALDI-MS. Using this method, it is demonstrated that bacteria can be discriminated based upon their protein profiles to the species level with only pmol level detection of proteins. It has also proved to be a fast and accurate means for monitoring the expression of Hsp27 in an insect cell system.

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