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  • Blackwell Science Ltd  (6)
  • 1995-1999  (6)
Collection
Publisher
Years
  • 1995-1999  (6)
Year
  • 1
    Electronic Resource
    Electronic Resource
    The HtrA family of serine proteases (1997)
    Oxford, UK : Blackwell Science Ltd
    Molecular microbiology 26 (1997), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: HtrA, also known as DegP and probably identical to the Do protease, is a heat shock-induced serine protease that is active in the periplasm of Escherichia coli. Homologues of HtrA have been described in a wide range of bacteria and in eukaryotes. Its chief role is to degrade misfolded proteins in the periplasm. Substrate recognition probably involves the recently described PDZ domains in the C-terminal half of HtrA and, we suspect, has much in common with the substrate recognition system of the tail-specific protease, Prc (which also possesses a PDZ domain). The expression of htrA is regulated by a complex set of signal transduction pathways, which includes an alternative sigma factor, RpoE, an anti-sigma factor, RseA, a two-component regulatory system, CpxRA, and two phosphoprotein phosphatases, PrpA and PrpB. Mutations in the htrA genes of Salmonella, Brucella and Yersinia cause decreased survival in mice and/or macrophages, and htrA mutants can act as vaccines, as cloning hosts and as carriers of heterologous antigens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1997.5601928.x
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  • 2
    Electronic Resource
    Electronic Resource
    Coiled-coil domains in proteins secreted by type III secretion systems (1997)
    Oxford, UK : Blackwell Science Ltd
    Molecular microbiology 25 (1997), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1997.4901850.x
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  • 3
    Electronic Resource
    Electronic Resource
    Bacterial copper- and zinc-cofactored superoxide dismutase contributes to the pathogenesis of systemic salmonellosis (1997)
    Oxford, UK : Blackwell Science Ltd
    Molecular microbiology 25 (1997), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Copper/zinc-cofactored superoxide dismutase ([Cu,Zn]-SOD) has been found in the periplasm of many bacterial species but its biological function is unknown. Here we report the cloning and characterization of sodC, encoding [Cu,Zn]-SOD, from Salmonella typhimurium. The predicted protein sequence shows only 58% identity to Escherichia coli SodC, and from this its chromosomal location and its immediate proximity to a phage gene, sodC, in Salmonella is speculated to have been acquired by bacteriophage-mediated horizontal transfer from an unknown donor. A sodC mutant of S. typhimurium was unimpaired on aerobic growth in rich medium but showed enhanced sensitivity in vitro to the microbicidal action of superoxide. S. typhimurium, S. choleraesuis and S. dublin sodC mutants showed reduced lethality in a mouse model of oral infection and persisted in significantly lower numbers in livers and spleens after intraperitoneal infection, suggesting that [Cu,Zn]-SOD plays a role in pathogenicity, protecting Salmonella against oxygen radical-mediated host defences. There was, however, no observable difference compared with wild type in the interaction of sodC mutants with porcine pleural, mouse peritoneal or J774 macrophages in vitro, perhaps reflecting the hierarchical capacity of different macrophage lines to kill Salmonella, the most efficient overwhelming the proposed protective effect of periplasmic SOD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1997.5151877.x
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  • 4
    Electronic Resource
    Electronic Resource
    Microbial genomes (1999)
    Oxford BSL : Blackwell Science Ltd
    Molecular microbiology 32 (1999), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Microbial genome sequencing is driven by the need to understand and control pathogens and to exploit extremophiles and their enzymes in bioremediation and industry. It is hard for the traditional bacteriologist to grasp the scale and pace of the venture. Around two dozen microbial genomes have now been completed and, within a decade, genomes from every significant species of bacterial pathogen of humans, animals and plants will have been sequenced. Indeed, we will often have more than one sequence from a species or genus — for example, we already have sequences from two strains of Helicobacter pylori, from two strains of Mycobacterium tuberculosis and from three species of Pyrococcus. However, genome sequencing risks becoming expensive molecular stamp-collecting without the tools to mine the data and fuel hypothesis-driven laboratory-based research. Bioinformatics, twinned with the new experimental approaches forming ‘functional genomics’, provides some of the needed tools. Nonetheless, there will be an increasing need for us to explore the detailed implications of genomic findings. Microbial genome sequencing thus represents not a threat, but an exciting opportunity for molecular microbiologists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1999.01427.x
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  • 5
    Electronic Resource
    Electronic Resource
    A β-propeller domain within TolB (1999)
    Oxford BSL : Blackwell Science Ltd
    Molecular microbiology 31 (1999), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1999.01168.x
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  • 6
    Electronic Resource
    Electronic Resource
    PDZ domains in bacterial proteins (1997)
    Oxford, UK : Blackwell Science Ltd
    Molecular microbiology 26 (1997), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2958.1997.5591911.x
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