SwePub
Tyck till om SwePub Sök här!
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Mond J) "

Sökning: WFRF:(Mond J)

  • Resultat 1-5 av 5
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Aad, G., et al. (författare)
  • 2011
  • swepub:Mat__t (refereegranskat)
  •  
2.
  •  
3.
  • Stapleton, M. R., et al. (författare)
  • Characterisation of IsaA and SceD, two putative lytic transglycosylases of Staphylococcus aureus
  • 2007
  • Ingår i: J Bacteriol. - 0021-9193. ; 189
  • Tidskriftsartikel (refereegranskat)abstract
    • Bacterial cell wall peptidoglycan is a dynamic structure requiring hydrolysis to allow cell wall growth and division. Staphylococcus aureus has many known and putative peptidoglycan hydrolases, including two likely lytic transglycosylases. These two proteins, IsaA and SceD, were both found to have autolytic activity. Regulatory studies showed that isaA and sceD genes are partially mutually compensatory, with the production of SceD being upregulated in an isaA mutant. The expression of sceD is also greatly upregulated by the presence of NaCl. Several regulators of isaA and sceD expression were identified. Inactivation of sceD resulted in impaired cell separation, as seen by light microscopy, and "clumping" of bacterial cultures. An isaA sceD mutant is attenuated for virulence, whilst SceD is essential for nasal colonisation in cotton rats, thus demonstrating the importance of cell wall dynamics in host-pathogen interactions.
  •  
4.
  • Cosgrove, K., et al. (författare)
  • Catalase (KatA) and alkyl hydroperoxide reductase (AhpC) have compensatory roles in peroxide stress resistance and are required for survival, persistence, and nasal colonization in Staphylococcus aureus
  • 2007
  • Ingår i: J Bacteriol. - 0021-9193. ; 189:3, s. 1025-35
  • Tidskriftsartikel (refereegranskat)abstract
    • Oxidative-stress resistance in Staphylococcus aureus is linked to metal ion homeostasis via several interacting regulators. In particular, PerR controls the expression of a regulon of genes, many of which encode antioxidants. Two PerR regulon members, ahpC (alkylhydroperoxide reductase) and katA (catalase), show compensatory regulation, with independent and linked functions. An ahpC mutation leads to increased H2O2 resistance due to greater katA expression via relief of PerR repression. Moreover, AhpC provides residual catalase activity present in a katA mutant. Mutation of both katA and ahpC leads to a severe growth defect under aerobic conditions in defined media (attributable to lack of catalase activity). This results in the inability to scavenge exogenous or endogenously produced H2O2, resulting in accumulation of H2O2 in the medium. This leads to DNA damage, the likely cause of the growth defect. Surprisingly, the katA ahpC mutant is not attenuated in two independent models of infection, which implies reduced oxygen availability during infection. In contrast, both AhpC and KatA are required for environmental persistence (desiccation) and nasal colonization. Thus, oxidative-stress resistance is an important factor in the ability of S. aureus to persist in the hospital environment and so contribute to the spread of human disease.
  •  
5.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-5 av 5

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy