title: The protein inventory of Clostridium difficile grown in complex and minimal medium.
abstract: The intestinal pathogen Clostridium difficile is causing an increasing number of infections often characterized by severity and high relapse rates. Profound knowledge of the physiology of the pathogen could help to develop new treatment strategies. Proteomics, a valuable tool to study bacterial physiology, was used in this work to establish a benchmark proteome of reference strain C. difficile 630Δerm with MS-based details on all identified proteins. Our elaborate annotation and visualization of C. difficile 630Δerm 3764 ORFs will serve as a valuable base for researchers having to evaluate global expression studies. To exemplify expression variability, protein expression of late exponentially growing cells in complex brain-heart infusion medium and C. difficile minimal medium was compared. Noteworthy results of this comparison are as follows: (i) the higher expression of enzymes for the biosynthesis of some vitamins and purine and (ii) downregulation of proteins involved in butanoate fermentation in C. difficile minimal medium. However, the abundance of proteins involved in DNA metabolism, protein synthesis, and the cell envelope showed no variation between the two growth media.
authors: Institute of Microbiology, University of Greifswald, Greifswald, Germany.
authors: Andreas
authors: A
authors: Otto
authors: Institute of Microbiology, University of Greifswald, Greifswald, Germany.
authors: Sandra
authors: S
authors: Maaß
authors: Institute of Microbiology, University of Greifswald, Greifswald, Germany.
authors: Christian
authors: C
authors: Lassek
authors: Institute of Microbiology, University of Greifswald, Greifswald, Germany.
authors: Dörte
authors: D
authors: Becher
authors: Institute of Microbiology, University of Greifswald, Greifswald, Germany.
authors: Michael
authors: M
authors: Hecker
authors: Institute of Microbiology, University of Greifswald, Greifswald, Germany.
authors: Katharina
authors: K
authors: Riedel
authors: Institute of Microbiology, University of Greifswald, Greifswald, Germany. susanne.sievers@uni-greifswald.de.
authors: Susanne
authors: S
authors: Sievers
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism*; D020148:Butyric Acid / Q000378:metabolism; D016360:Clostridioides difficile / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*; D003470:Culture Media / Q000737:chemistry*; D005285:Fermentation / Q000187:drug effects; D007291:Inosine Monophosphate / Q000096:biosynthesis; D040901:Proteomics
chemical_list: D001426:Bacterial Proteins; D003470:Culture Media; D020148:Butyric Acid; D007291:Inosine Monophosphate
keywords: Benchmark proteome; Clostridium difficile; Comprehensive peptide dataset; Label-free protein quantification; Voronoi treemaps