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  • Articles  (9,648)
  • Springer Nature  (8,347)
  • Blackwell Publishing Ltd  (1,301)
  • American Meteorological Society
  • International Union of Crystallography
  • Springer Science + Business Media
  • 2000-2004  (9,648)
  • 1975-1979
  • 1960-1964
  • 2002  (9,648)
  • Biology  (9,648)
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  • Articles  (9,648)
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  • 2000-2004  (9,648)
  • 1975-1979
  • 1960-1964
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  • 1
    Electronic Resource
    Electronic Resource
    Microtubules Mediate Germ-nuclear Behavior after Meiosis in Conjugation of Paramecium caudatum (2002)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 49 (2002), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . Microtubule dynamics in Paramecium caudatum were investigated with an anti-α-tubulin antibody and a microinjection technique to determine the function of microtubules on micronuclear behavior during conjugation. After meiosis, all four haploid micronuclei were connected by microtubular filaments to the paroral region and moved close to this region. This nuclear movement was micronucleus-specific, because some small macronuclear fragments transplanted from exconjugants never moved to the region. Only one of the four germ nuclei moved into the paroral cone and was covered by microtubule assembly (the so-called first assembly of microtubules, AM-I). This nucleus survived there, while the other three not in this region degenerated. The movement of germ nucleus was inhibited by the injection of the anti-α-tubulin antibody. The surviving germ nucleus divided once and produced a migratory pronucleus and a stationary pronucleus. Prior to the reciprocal exchange of the migratory nuclei, microtubules assembled around the migratory pronuclei again (the so-called second assembly of microtubules, AM-II). Then, the migratory pronucleus moved into the partner cell and fused with the stationary pronucleus. Thus, microtubules appear to be indispensable for nuclear behavior: they enable migration of postmeiotic nuclei to the paroral region and they permit the survival of the nucleus at the paroral cone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.2002.tb00344.x
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  • 2
    Electronic Resource
    Electronic Resource
    ERRATUM (2002)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 49 (2002), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.2002.tb00348.x
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  • 3
    Electronic Resource
    Electronic Resource
    BOOK REVIEW (2002)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 49 (2002), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.2002.tb00349.x
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  • 4
    Electronic Resource
    Electronic Resource
    Arginine Kinase: A Common Feature for Management of Energy Reserves in African and American Flagellated Trypanosomatids (2002)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 49 (2002), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . This work reports the characterization of an arginine kinase in the unicellular parasitic flagellate Trypanosoma brucei, the etiological agent of human sleeping sickness and Nagana in livestock. The arginine kinase activity, detected in the soluble fraction obtained from procyclic forms, had a specific activity similar to that observed in Trypanosoma cruzi, about 0.2 μmol min−1mg−1. Western blot analysis of T. brucei extracts revealed two bands of 40 and 45 kDa. The putative gene sequence of this enzyme had an open reading frame for a 356-amino acid polypeptide, one less than the equivalent enzyme of T. cruzi. The deduced amino acid sequence has an 82% identity with the arginine kinase of T. cruzi, and highest amino acid identities of both trypanosomatids sequences, about 70%, were with arginine kinases from the phylum Arthropoda. In addition, the amino acid sequence possesses the five arginine residues critical for interaction with ATP as well as two glutamic acids and one cysteine required for arginine binding. The finding in trypanosomatids of a new phosphagen biosynthetic pathway, which is not present in mammalian host tissues, suggests this enzyme as a possible target for chemotherapy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.2002.tb00346.x
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  • 5
    Electronic Resource
    Electronic Resource
    Current status of pathogenetic mechanisms in staphylococcal arthritis (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 217 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Interactions between staphylococci and the joint tissues of the host lead typically to rapidly progressing and highly destructive processes. Staphylococci possess a vast arsenal of components and products that contribute to the pathogenesis of joint infection. Occasionally these compounds have overlapping activities and act either in concert or alone. Host responsiveness to staphylococcal infection displays an even more complex pattern. Most of the cells and molecules that participate in the innate immune system protect the host against bacteria. However, the staphylococci have developed systems that counteract endogenous protective mechanisms. Interestingly, certain cells and molecules of the acquired immune system potentiate the severity of infection by triggering exaggerated responses to the staphylococcal danger signals. This review deals with the intricate host–bacterium interactions that occur during experimental septic arthritis, and outlines potential preventive and treatment modalities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11466.x
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  • 6
    Electronic Resource
    Electronic Resource
    Amino acid alterations in Gp38 of host range mutants of PP01 and evidence for their infection of an ompC null mutant of Escherichia coli O157:H7 (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 216 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The previously isolated T-even type coliphage PP01, specifically infective to Escherichia coli O157:H7, uses the outer membrane protein OmpC as a receptor. The characterization of a spontaneous PP01-resistant strain indicated that it had lost ompC due to the deletion of a 14-kbp region upstream of and partially including ompC. Two host range mutants, able to infect an ompC null mutant, were isolated. Sequencing of gene 38, which codes for the receptor recognition protein Gp38, indicated three mutations in one mutant and two in the other. Both mutant proteins had a Gly208Arg, a Gly161Arg or Gly101His replacement, respectively, and the one mutant phage in addition a Trp189Arg replacement. These alterations suggest that the host range was mediated by a more positively charged Gp38.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11442.x
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  • 7
    Electronic Resource
    Electronic Resource
    Glucose-6-phosphate dehydrogenase from the hyperthermophilic bacterium Thermotoga maritima: expression of the g6pd gene and characterization of an extremely thermophilic enzyme (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 216 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The gene (open reading frame Tm1155, g6pd) encoding glucose-6-phosphate dehydrogenase (G6PD, EC 1.1.1.49) of the hyperthermophilic bacterium Thermotoga maritima was cloned and functionally expressed in Escherichia coli. The purified recombinant enzyme is a homodimer with an apparent molecular mass of 95 kDa composed of 60-kDa subunits. Rate dependence (at 80°C) on glucose-6-phosphate and NADP+ followed Michaelis–Menten kinetics with apparent Km values of 0.15 mM and 0.03 mM, respectively; apparent Vmax values were about 20 U mg−1. The enzyme also reduced NAD+ (apparent Km 12 mM, Vmax 12 U mg−1). The 1000-fold higher catalytic activity (kcat/Km) with NADP+ over NAD+ defines the G6PD as NADP+ specific in vivo. G6PD activity was competitively inhibited by NADPH with a Ki value of 0.11 mM. With a temperature optimum of 92°C the enzyme is the most thermoactive G6PD described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11443.x
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  • 8
    Electronic Resource
    Electronic Resource
    Cellular localisation of the clamp protein during DNA replication (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 216 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The β subunit of Escherichia coli DNA polymerase III holoenzyme was fused to the green fluorescent protein GFP. The gene fusion under the control of the heterologous lac promoter was used to replace the wild-type allele in the chromosome. The formation of GFP-β fluorescent foci in GFP-β expressing cells required DNA replication and their number per cell was dependent on cell growth. Examination of GFP-β foci in a synchronous round of replication suggested that DNA replication was accompanied by the recruitment of GFP-β foci near the midcell, followed by the rapid migration of the foci in opposite directions to the 1/4 and 3/4 positions during DNA replication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11444.x
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  • 9
    Electronic Resource
    Electronic Resource
    Meiothermus rosaceus sp. nov. isolated from Tengchong hot spring in Yunnan, China (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 216 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A rosy-pigmented Gram-negative, thermophilic bacterium with an optimum growth temperature of about 55°C was isolated from Tengchong hot springs in Yunnan province, China. Its growth scarcely occurred below 40°C or above 70°C. Phylogenetic and secondary structural analyses of 16S rRNA and DNA–DNA hybridization showed that the organism represented a new species of the genus Meiothermus. This new species could be distinguished easily from other species of the genus Meiothermus by the following phenotypic characteristics: rosy pigment, expanded body, sucrose and maltose were not utilized, gelatin and starch were not hydrolyzed. On the basis of the above data, the name Meiothermus rosaceus sp. nov. was proposed for the species represented by the strain RH9901T(CCTCC-AB200291).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11445.x
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  • 10
    Electronic Resource
    Electronic Resource
    A variant enterococcal surface protein Espfm in Enterococcus faecium; distribution among food, commensal, medical, and environmental isolates (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 216 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Enterococci are increasingly important causes of nosocomial disease. Also, they are associated with food and have a history of use as dairy starter and probiotic cultures. An enterococcal surface protein Espfs is involved the virulence and biofilm-forming capacity of Enterococcus faecalis and recently we demonstrated the presence of a homologue Espfm in E. faecium. Here we describe the complete structure of Espfm and demonstrate that its distribution in E. faecium correlates with disease associated strains from a range of pathological sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11446.x
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