Abstract:
:Staphylococcus aureus Clp ATPases (molecular chaperones) alter normal physiological functions including an aconitase-mediated effect on post-stationary growth, acetate catabolism, and entry into death phase (Chatterjee et al., J. Bacteriol. 2005, 187, 4488-4496). In the present study, the global function of ClpC in physiology, metabolism, and late-stationary phase survival was examined using DNA microarrays and 2-D PAGE followed by MALDI-TOF MS. The results suggest that ClpC is involved in regulating the expression of genes and/or proteins of gluconeogenesis, the pentose-phosphate pathway, pyruvate metabolism, the electron transport chain, nucleotide metabolism, oxidative stress, metal ion homeostasis, stringent response, and programmed cell death. Thus, one major function of ClpC is balancing late growth phase carbon metabolism. Furthermore, these changes in carbon metabolism result in alterations of the intracellular concentration of free NADH, the amount of cell-associated iron, and fatty acid metabolism. This study provides strong evidence for ClpC as a critical factor in staphylococcal energy metabolism, stress regulation, and late-stationary phase survival; therefore, these data provide important insight into the adaptation of S. aureus toward a persister state in chronic infections.
journal_name
Proteomicsjournal_title
Proteomicsauthors
Chatterjee I,Schmitt S,Batzilla CF,Engelmann S,Keller A,Ring MW,Kautenburger R,Ziebuhr W,Hecker M,Preissner KT,Bischoff M,Proctor RA,Beck HP,Lenhof HP,Somerville GA,Herrmann Mdoi
10.1002/pmic.200800586subject
Has Abstractpub_date
2009-03-01 00:00:00pages
1152-76issue
5eissn
1615-9853issn
1615-9861journal_volume
9pub_type
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