نتایج جستجو برای: fimbriae

تعداد نتایج: 2266  

2015
Verónica Bravo Andrea Puhar Philippe Sansonetti Claude Parsot Cecilia S. Toro

Shigella spp. are responsible for bacillary dysentery in humans. The acquisition or the modification of the virulence plasmid encoding factors promoting entry of bacteria into and dissemination within epithelial cells was a critical step in the evolution of these bacteria from their Escherichia coli ancestor(s). Incorporation of genomic islands (GI) and gene inactivation also shaped interaction...

Journal: :Molecular microbiology 2016
Sohinee Sarkar Leah W Roberts Minh-Duy Phan Lendl Tan Alvin W Lo Kate M Peters David L Paterson Mathew Upton Glen C Ulett Scott A Beatson Makrina Totsika Mark A Schembri

Uropathogenic Escherichia coli (UPEC) of sequence type 131 (ST131) are a pandemic multidrug resistant clone associated with urinary tract and bloodstream infections. Type 1 fimbriae, a major UPEC virulence factor, are essential for ST131 bladder colonization. The globally dominant sub-lineage of ST131 strains, clade C/H30-R, possess an ISEc55 insertion in the fimB gene that controls phase-varia...

2012
Yasuhiro Oishi Kiyoko Watanabe Hidefumi Kumada Eriko Ishikawa Nobushiro Hamada

BACKGROUND Porphyromonas gulae are black-pigmented anaerobic bacteria isolated from the gingival sulcus of various animal hosts and are distinct from Porphyromonas gingivalis originating in humans. We previously reported the antigenic similarities of 41-kDa fimbriae between P. gulae ATCC 51700 and P. gingivalis ATCC 33277. In this study, to clarify the presence of another type of fimbriae of P....

Journal: :The Journal of Experimental Medicine 1983
S N Abraham D L Hasty W A Simpson E H Beachey

The relationship between the structure and biological function of type 1 fimbriae of Escherichia coli was investigated using a set of monoclonal antibodies directed against conformation-specific antigenic determinants. Of three monoclonal antibodies tested, only one (clone CD3) prevented adhesion of the vaccine strain to epithelial cells or guinea pig erythrocytes. The antibody produced by CD3,...

Journal: :Journal of molecular pathology 2022

Periodontitis is a chronic inflammatory disease characterized by the destruction of supporting structures teeth. Its high prevalence and negative effects on quality life make it one current problems in dentistry. Porphyromonas gingivalis (P. gingivalis) predominant periodontal pathogen that expresses number virulence factors involved pathogenesis periodontitis. P. fimbriae are critical factor i...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Leah S Ronald Olga Yakovenko Nina Yazvenko Sujay Chattopadhyay Pavel Aprikian Wendy E Thomas Evgeni V Sokurenko

Signal peptides (SPs) are critical for protein transport across cellular membranes, have a highly conserved structure, and are cleaved from the mature protein upon translocation. Here, we report that naturally occurring mutations in the SP of the adhesive, tip-associated subunit of type 1 fimbriae (FimH) are positively selected in uropathogenic Escherichia coli. On the one hand, these mutations...

Journal: :Infection and immunity 2009
Deanne L Pierce So-ichiro Nishiyama Shuang Liang Min Wang Martha Triantafilou Kathy Triantafilou Fuminobu Yoshimura Donald R Demuth George Hajishengallis

The fimbriae of Porphyromonas gingivalis mediate critical roles in host colonization and evasion of innate defenses and comprise polymerized fimbrilin (FimA) associated with quantitatively minor accessory proteins (FimCDE) of unknown function. We now show that P. gingivalis fimbriae lacking FimCDE fail to interact with the CXC-chemokine receptor 4 (CXCR4), and bacteria expressing FimCDE-deficie...

Journal: :Infection and immunity 1991
S L Sauter S M Rutherfurd C Wagener J E Shively S A Hefta

Nonspecific cross-reacting antigen (NCA) is a well-characterized membrane glycoprotein on granulocytes, macrophages, and lung epithelium. Structural studies at the protein and genomic levels have revealed that NCA is a member of the immunoglobulin supergene family, and hybridization studies showed that the transcript level of NCA is induced by treatment with gamma interferon. These studies, as ...

Journal: :Molecular microbiology 2009
Wouter de Jong Han A B Wösten Lubbert Dijkhuizen Dennis Claessen

The chaplin proteins ChpA-H enable the filamentous bacterium Streptomyces coelicolor to form reproductive aerial structures by assembling into surface-active amyloid-like fibrils. We here demonstrate that chaplins also mediate attachment of S. coelicolor to surfaces. Attachment coincides with the formation of fimbriae, which are connected to the cell surface via spike-shaped protrusions. Mass s...

2010
Glen C. Ulett Amanda N. Mabbett Khe C. Fung Richard I. Webb Mark A. Schembri

Uropathogenic Escherichia coli (UPEC) is the primary cause of urinary tract infection (UTI) in the developed world. The major factors associated with virulence of UPEC are fimbrial adhesins, which mediate attachment to specific receptors, enhance persistence and trigger innate host responses. UPEC produce a range of fimbrial adhesins, with type 1 and P fimbriae of the chaperone-usher subclass b...

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