Some biological features of a deep P. mirabilis 17301 R mutant isolated from the urine of a patient with chronic UTI were studied and compared with similar features of P. mirabilis S forms and five induced Proteus R mutants of different chemotypes. There were no differences in lethal toxicity and adhesion to human uroepithelial cells. Of all the R mutants tested, two of them, 17301 and R4, exhibited strong cell-bound hemolytic activity. The P. mirabilis R 17301 was characterized as the most invasive (tested in L929 mouse fibroblasts) compared to the other Proteus S and R forms. The structure of PS from a clinical R mutant investigated and the results of serological studies prove that this mutant belongs to the Rc chemotype.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
The transposition of a heat-activated retrotransposon ONSEN resulted in changes in the hypocotyl elongation.
Genes Genet Syst
January 2025
Faculty of Science, Hokkaido University.
In our study, we aimed to identify new mutants resulting from ONSEN transposition in Arabidopsis thaliana by subjecting nrpd1 mutants to heat stress. We isolated a mutant with a significantly elongated hypocotyl, named "Long hypocotyl in ONSEN inserted line 1" (HYO1). This phenotype was heritable, with progeny consistently displaying longer hypocotyls than the wild type.
View Article and Find Full Text PDFMechanisms of multidrug resistance caused by an Ipi1 mutation in the fungal pathogen Candida glabrata.
Nat Commun
January 2025
Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
Multidrug resistance in the pathogenic fungus Candida glabrata is a growing global threat. Here, we study mechanisms of multidrug resistance in this pathogen. Exposure of C.
View Article and Find Full Text PDFHemagglutinin with a polybasic cleavage site confers high virulence on H7N9 avian influenza viruses.
Poult Sci
January 2025
Animal Infectious Disease Laboratory, College of Veterinary Medicine, Yangzhou University, Yangzhou, PR China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, PR China; Jiangsu Key Laboratory of Zoonoses, Yangzhou University, Yangzhou, PR China. Electronic address:
H7N9 avian influenza virus (AIV) first emerged in February 2013 in China, and early isolates were all low pathogenic (LP). After circulation for a few years in live poultry markets of China, LP H7N9 AIVs evolved into a highly pathogenic (HP) form in late 2016. Deduced amino acid sequence analysis of hemagglutinin (HA) gene revealed that all HP H7N9 AIVs have obtained four-amino-acid insertion at position 339-342 (H7 numbering), making the cleavage site from a monobasic motif (LP AIVs) to a polybasic form (HP AIVs).
View Article and Find Full Text PDFHP0135 Is a Small Lipoprotein That Has a Role in Outer Membrane Stability.
Molecules
January 2025
Department of Microbiology, University of Georgia, Athens, GA 30602, USA.
is a Gram-negative bacterium and human pathogen that is linked to various gastric diseases, including peptic ulcer disease, chronic gastritis, and gastric cancer. The filament of the flagellum is surrounded by a membranous sheath that is contiguous with the outer membrane. Proteomic analysis of isolated sheathed flagella from B128 identified the lipoprotein HP0135 as a potential component of the flagellar sheath.
View Article and Find Full Text PDFProtease activity of NIa-Pro determines systemic pathogenicity of clover yellow vein virus.
Virology
January 2025
Jiangsu Key Laboratory for Pathogens and Ecosystems, Jiangsu Engineering and Technology Research Center for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, China. Electronic address:
Clover yellow vein virus (ClYVV), a potyvirus that infects various dicotyledonous plants, poses a significant threat to the cultivation of legumes. Although potyviral NIa-Pro was extensively studied in viral infection cycle and host antiviral responses, the contribution of NIa-Pro protease activity to virus systemic symptoms has not yet been reported. In this study, we developed infectious clones of a ClYVV isolated from Pisum sativum.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!