Hilfe Wegweiser Datenschutzhinweis Impressum Kontakt





Growth phase dependent regulation of protein composition in Rhodopirellula baltica


Gade,  Doerte
Max Planck Society;

Stuehrmann,  Torben
Max Planck Society;

Reinhardt,  Richard
High Throughput Technologies, Max Planck Institute for Molecular Genetics, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar

Gade, D., Stuehrmann, T., Reinhardt, R., & Rabus, R. (2005). Growth phase dependent regulation of protein composition in Rhodopirellula baltica. Environmental Microbiology, 7(8), 1074-1084. doi:10.1111/j.1462-2920.2005.00784.x.

Growth phase dependent changes of protein composition in the marine bacterium Rhodopirellula baltica were quantitatively monitored by applying the two-dimensional difference gel electrophoresis (2D DIGE) technology. The number of regulated proteins (fold changes in protein abundance > absolute value(2)) increased from early (10) to late stationary growth phase (179), with fold changes reaching maximal values of 40. About 110 of these regulated protein spots were analysed by MALDI-TOF-MS and identified by mapping of peptide masses. Results indicate an opposing regulation of tricarboxylic acid cycle and oxidative pentose phosphate cycle, a downregulation of several enzymes involved in amino acid biosynthesis and an upregulation of the alternative sigma factor sigmaH in stationary phase. Interestingly, 26 proteins of unknown function were up- or downregulated in the stationary phase. Several proteins were specifically regulated during growth on solid surface (agar plates). These proteins could possibly be involved in the development of the different R. baltica morphotypes, i.e. motile swarmer cells and sessile cell aggregates (so-called rosettes).