Browsing School of Natural Sciences by Issue Date
Now showing items 1-20 of 166
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The isolation of strains of Bacillus subtilis showing improved plasmid stability characteristics by means of selective chemostat culture
(1988-03-23)A PUB 110-derived plasmid encoding chloramphenicol resistance, kanamycin resistance and high-temperature alpha-amylase showed a high degree of segregational instability when inserted into Bacillus subtilis. In an attempt ... -
Role of alginate lyase in cell detachment of Pseudomonas aeruginosa
(American Society for Microbiology, 1994-07)The exopolysaccharide alginate of Pseudomonas aeruginosa was shown to be important in determining the degree of cell detachment from an agar surface. Nonmucoid strain 8822 gave rise to 50-fold more sloughed cells than ... -
LcrG is required for efficient translocation of Yersinia Yop effector proteins into eukaryotic cells
(American Society for Microbiology, 1998-06)Extracellular Yersinia disables the immune system of its host by injecting effector Yop proteins into host cells. We show that a Yersinia enterocolitica nonpolar lcrG mutant is severely impaired in the translocation of ... -
The virulence plasmid of Yersinia, an anti-host genome
(American Society for Microbiology, 1998-12)Invasive pathogenic bacteria have in common the capacity to overcome the defense mechanisms of their animal host and to proliferate in its tissues. They each have their own life-style and target organs and cause a variety ... -
Competition between the Yops of Yersinia enterocolitica for delivery into eukaryotic cells: Role of the SycE chaperone binding domain of YopE
(American Society for Microbiology, 2000-09)A type III secretion-translocation system allows Yersinia adhering at the surface of animal cells to deliver a cocktail of effector Yops (YopH, -O, -P, -E, -M, and -T) into the cytosol of these cells. Residues or codons 1 ... -
Role of mitochondria in neuronal apoptosis
(Karger Publishers, 2000-12)Apoptosis is a controlled form of cell death that participates in the demise of neuronal cells during development, neurodegenerative disorders and exposure to neurotoxic agents. In recent years, the mitochondria have emerged ... -
Adenylate Cyclase Toxin from Bordetella pertussis Synergizes with Lipopolysaccharide To Promote Innate Interleukin-10 Production and Enhances the Induction of Th2 and Regulatory T Cells
(American Society for Microbiology, 2004-03)Adenylate cyclase toxin (CyaA) from Bordetella pertussis can subvert host immune responses allowing bacterial colonization. Here we have examined its adjuvant and immunomodulatory properties and the possible contribution ... -
The cell walls of pteridophytes and other green plants - a review
(British Pteridological Society, 2006-12-22)The cell wall is one of the defining characteristics of plants and is a fundamental component in normal growth and development. Cell wall composition is a potentially valuable source of phylogenetic information as notable ... -
Expansions of CAG·CTG repeats in immortalized human astrocytes.
(Oxford University Press, 2007)Expansions of trinucleotide repeats (TNRs) are the genetic cause for a number of neurodegenerative disorders. In some of these diseases, ongoing somatic expansions in the brain are thought to contribute to disease progression. ... -
Partial reconstitution of DNA large loop repair with purified proteins from Saccharomyces cerevisiae
(OUP, 2008)Small looped mispairs are corrected by DNA mismatch repair. In addition, a distinct process called large loop repair (LLR) corrects heteroduplexes up to several hundred nucleotides in bacteria, yeast and human cells, and ... -
Mrc1, Tof1 and Csm3 inhibit CAG·CTG repeat instability by at least two mechanisms
(Springer, 2008)Trinucleotide repeats frequently expand and contract in humans and model organisms. Protein factors that modulate this process have been found by candidate gene approaches or mutant screens for increased expansion ... -
Rapid unwinding of triplet repeat hairpins by Srs2 helicase of Saccharomyces cerevisiae
(2008)Expansions of trinucleotide repeats cause at least 15 heritable human diseases. Single-stranded triplet repeat DNA in vitro forms stable hairpins in a sequence-dependent manner that correlates with expansion risk in vivo. ... -
Bordetella pertussis expresses a functional type III secretion system that subverts protective innate and adaptive immune responses
(American Society for Microbiology, 2008-01)Certain bacteria use a type III secretion system (TTSS) to deliver effector proteins that interfere with cell function into host cells. While transcription of genes encoding TTSS components has been demonstrated, studies ... -
Neuronal cell death in neurodegenerative diseases: recurring themes around protein handling
(Wiley, 2008-06-27)Neuronal cell death plays a role in many chronic neurodegenerative diseases with the loss of particular subsets of neurons. The loss of the neurons occurs during a period of many years, which can make the mode(s) of cell ... -
Identification of Components of the Sigma B Regulon in Listeria monocytogenes That Contribute to Acid and Salt Tolerance
(American Society for Microbiology, 2008-09)Sigma B is an alternative sigma factor that controls the transcriptional response to stress in Listeria monocytogenes and is also known to play a role in the virulence of this human pathogen. In the present study we ... -
Electron backscatter diffraction (EBSD) in the SEM: applications to microstructures in minerals and rocks and recent technological advancements
(Sociedad Española de la Mineralogía, 2008-09-16)Electron backscatter diffraction (EBSD) is based on the principle that a beam of electrons generated in the scanning electron microscope (SEM) is the source of randomly scattered electrons in a specimen. The backscattered ... -
Restriction of human polyomavirus BK virus DNA replication in murine cells and extracts
(2009)BK virus (BKV) causes persistent and asymptomatic infections in most humans and is the etiologic agent of polyomavirus-associated nephropathy (PVAN) and other pathologies. Unfortunately, there are no animal models with ... -
Specificity and sensitivity evaluation of novel and existing Bacteroidales and Bifidobacteria-specific PCR assays on feces and sewage samples and their application for microbial source tracking in Ireland
(Elsevier, 2009)Three novel ruminant-specific PCR assays, an existing ruminant-specific PCR assay and five existing human-specific PCR assays, which target 16S rDNA from Bacteroidales or Bifidobacteria, were evaluated. The assays were ... -
Bcl-2 family on guard at the ER
(American Physiological Society, 2009)The endoplasmic reticulum (ER) is the main site for protein folding, lipid biosynthesis and calcium storage in the cell. Disturbances of these critical cellular functions lead to ER stress. The ER responds to disturbances ... -
Methods for Monitoring Endoplasmic Reticulum Stress and the Unfolded Protein Response
(2010)The endoplasmic reticulum (ER) is the site of folding of membrane and secreted proteins in the cell. Physiological or pathological processes that disturb protein folding in the endoplasmic reticulum cause ER stress and ...