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- CSA, Ovid from 2000, Ingenta, Gale, Wiley from 1987, Rcgp, and Proquest
The mobility of two kinase domains in the Escherichia coli chemoreceptor array varies with signalling state.
We apply high-resolution electron cryotomography to visualize mutant chemoreceptor signalling arrays in well-defined kinase activity states. The arrays were well ordered in all signalling states, with no discernible differences in receptor conformation at 2-3 nm resolution. Differences were observed...
VeA and MvlA repression of the cryptic orsellinic acid gene cluster in Aspergillus nidulans involves histone 3 acetylation.
We have identified a novel cluster suppressor in Aspergillus nidulans, MvlA (modulator of veA loss). Genetic assessment of MvlA mutants revealed the role of both itself and VeA (but not the VeA partner LaeA) in the suppression of the cryptic ors gene cluster producing orsellinic acid and its F9775 d...
YdiV: a dual function protein that targets FlhDC for ClpXP-dependent degradation by promoting release of DNA-bound FlhDC complex.
Our results suggest that YdiV is an EAL-like protein that has evolved from a dicyclic-GMP phosphodiesterase into a dual-function regulatory protein that connects flagellar gene expression to nutrient starvation. © 2012 Blackwell Publishing Ltd....
The genetic and structural basis of two distinct terminal side branch residues in stewartan and amylovoran exopolysaccharides and their pote...
We report that the pyruvyl transferase gene in P. stewartii is non-functional, while the terminal glucosyl transferase is catalytically active. Conversely, in E. amylovora, the homologous glucosyl tranferase activity appears to be relatively ineffective, while the pyruvyl transferase function predom...
Exposing the third chromosome of Burkholderia cepacia complex strains as a virulence plasmid.
We isolated three mutants during a transposon mutagenesis screen that were non-pathogenic in a Caenorhabditis elegans infection model. It was demonstrated that these mutants had lost chromosome 3 (c3), and that the observed attenuation of virulence was a consequence of this. We constructed a c3 mini...
Sorting of an integral outer membrane protein via the lipoprotein-specific Lol pathway and a dedicated lipoprotein pilotin.
We present indirect evidence that PulD protomers do not assemble into the secretin dodecamer before they reach the outer membrane, and that PulS reaches the outer membrane in a soluble heterodimer with the general lipoprotein chaperone LolA. However, we could not find any direct evidence for PulD pr...
SAP1 is a critical post-transcriptional regulator of infectivity in malaria parasite sporozoite stages.
We previously identified a conserved sporozoite-specific protein, SAP1, which has an essential role in Plasmodium liver infection. Targeted deletion of SAP1 in Plasmodium yoelii caused the depletion of a number of selectively tested UIS transcripts in sporozoites, resulting in a complete early liver...
Repression of ergosterol biosynthesis is essential for stress resistance and is mediated by the Hog1 MAP kinase and the Mot3 and Rox1 transc...
We characterize a novel physiological determinant of osmostress tolerance, which involves the Hog1-dependent transcriptional downregulation of ergosterol biosynthesis genes (ERG). Yeast cells considerably lower their sterol content in response to high osmolarity. The transcriptional repressors Mot3...
Involvement of the Aspergillus nidulans protein kinase C with farnesol tolerance is related to the unfolded protein response.
We demonstrated that the Aspergillus nidulans calC2 mutation in protein kinase C pkcA was able to confer tolerance to farnesol (FOH), an isoprenoid that has been shown to inhibit proliferation and induce apoptosis. Here, we investigate in more detail the role played by A. nidulans pkcA in FOH tolera...
Vancomycin tolerance in clinical and laboratory Streptococcus pneumoniae isolates depends on reduced enzyme activity of the major LytA autol...
We examined two vancomycin-tolerant clinical isolates, i.e., a purported autolysin negative (LytA(-)), serotype 23F isolate (strain S3), and the serotype 14 strain "Tupelo" which is considered a paradigm of vancomycin tolerance. S3 was characterized here as carrying a frameshift mutation in the lytA...