title: Anti-stress activity of Propionibacterium freudenreichii : identification of a reactivative protein.
abstract: Propionibacterium freudenreichii subsp. shermanii is known to prevent mutations caused by various agents such as N-methyl-N'-nitro-N-nitrosoguanidine, 9-aminoacridine, 4-nitro-quinoline-1-oxide and by UV radiation in both prokaryotic and eukaryotic cells. It was also shown to prevent or repair damage caused by H(2)O(2) or UV radiation in Salmonella typhimurium and Escherichia coli, a characteristic previously designated as reactivative effect. In order to characterise this effect at the molecular level, we have purified the active component from a P. freudenreichii cell-free extract using a combination of ammonium sulfate precipitation, anion-exchange and size-exclusion chromatography. The isolated 35 kDa protein was then identified using both N-terminal and internal peptide sequencing as a cysteine synthase. The latter was localised in the P. freudenreichii proteomic map. It is constitutively expressed but also clearly induced during adaptation to detergent and heat, but not acid, stresses. The biological meaning of cysteine synthase in the context of adaptation to oxidative and non-oxidative stresses is discussed.
authors.affiliation: Department of Microbiology, Moscow State University, 119899 Moscow, Russia.
authors.forename: Lena
authors.initials: L
authors.lastname: Vorobjeva
authors.forename: Pauline
authors.initials: P
authors.lastname: Leverrier
authors.forename: Aleksei
authors.initials: A
authors.lastname: Zinchenko
authors.forename: Patrick
authors.initials: P
authors.lastname: Boyaval
authors.forename: Evgeni
authors.initials: E
authors.lastname: Khodjaev
authors.forename: Svetlana
authors.initials: S
authors.lastname: Varioukhina
authors.forename: Galina
authors.initials: G
authors.lastname: Ponomareva
authors.forename: Elena
authors.initials: E
authors.lastname: Gordeeva
authors.forename: Gwénaël
authors.initials: G
authors.lastname: Jan
mesh_terms: D015112:4-Nitroquinoline-1-oxide / Q000494:pharmacology; D000585:Aminacrine / Q000494:pharmacology; D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry / Q000187:drug effects / Q000235:genetics* / Q000302:isolation & purification; D001647:Bile Acids and Salts / Q000494:pharmacology; D002273:Carcinogens / Q000494:pharmacology; D003547:Cysteine Synthase / Q000737:chemistry / Q000235:genetics* / Q000302:isolation & purification; D004249:DNA Damage; D004260:DNA Repair / Q000187:drug effects / Q000528:radiation effects; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics / Q000502:physiology / Q000528:radiation effects; D015964:Gene Expression Regulation, Bacterial / Q000187:drug effects; D006861:Hydrogen Peroxide / Q000494:pharmacology; D013058:Mass Spectrometry; D008769:Methylnitronitrosoguanidine / Q000494:pharmacology; D008969:Molecular Sequence Data; D016296:Mutagenesis; D010446:Peptide Fragments / Q000737:chemistry; D011424:Propionibacterium / Q000187:drug effects / Q000235:genetics / Q000502:physiology* / Q000528:radiation effects; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014466:Ultraviolet Rays
chemical_list: D001426:Bacterial Proteins; D001647:Bile Acids and Salts; D002273:Carcinogens; D010446:Peptide Fragments; D008769:Methylnitronitrosoguanidine; D015112:4-Nitroquinoline-1-oxide; D000585:Aminacrine; D006861:Hydrogen Peroxide; D003547:Cysteine Synthase