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Genetics, Structure, and Function of Group A Streptococcal Pili.
Front Microbiol
February 2021
Institute of Medical Microbiology, Virology and Hygiene, University of Rostock, Rostock, Germany.
(Group A ; GAS) is an exclusively human pathogen. This bacterial species is responsible for a large variety of infections, ranging from purulent but mostly self-limiting oropharynx/skin diseases to streptococcal sequelae, including glomerulonephritis and rheumatic fever, as well as life-threatening streptococcal toxic-shock syndrome. GAS displays a wide array of surface proteins, with antigenicity of the M protein and pili utilized for M- and T-serotyping, respectively.
View Article and Find Full Text PDFReorganisation of the salivary mucin network by dietary components: insights from green tea polyphenols.
PLoS One
November 2015
Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom.
The salivary mucins that include MUC5B (gel-forming) and MUC7 (non-gel-forming) are major contributors to the protective mucus barrier in the oral cavity, and it is possible that dietary components may influence barrier properties. We show how one dietary compound, the green tea polyphenol epigallocatechin gallate (EGCG), can substantially alter the properties of both the polymeric MUC5B network and monomeric MUC7. Using rate-zonal centrifugation, MUC5B in human whole saliva and MUC5B purified from saliva sedimented faster in the presence of EGCG.
View Article and Find Full Text PDFLive cell imaging of outward and inward vesiculation induced by the complement c5b-9 complex.
J Biol Chem
October 2007
Department of Cell and Developmental Biology, Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
Cells resist death induced by the complement membrane attack complex (MAC, C5b-9) by removal of the MAC from their surface by an outward and/or inward vesiculation. To gain an insight into the route of MAC removal, human C9 was tagged with Alexa Fluor 488 and traced within live cells. Tagged C9-AF488 was active in lysis of erythrocytes and K562 cells.
View Article and Find Full Text PDFWound fluids from saline solution- and Staphylococcus aureus peptidoglycan-inoculated sponges induce expression of matrix metalloproteinase 13 messenger ribonucleic acid by cultured rat fibroblasts.
Wound Repair Regen
June 2007
Department of Surgery, Albert Einstein College of Medicine, Jack and Pearl Resnick Campus, Bronx, NY 10461, USA.
Polyvinyl alcohol sponges inoculated with Staphylococcus aureus peptidoglycan induce an accelerated wound healing response when implanted subcutaneously in rats. S. aureus peptidoglycan leads to a marked increase (50%) in reparative tissue collagen (as measured by hydroxyproline) by 4 days.
View Article and Find Full Text PDFDetermination of the complete covalent structure of the major glycoform of DQH sperm surface protein, a novel trypsin-resistant boar seminal plasma O-glycoprotein related to pB1 protein.
Protein Sci
July 1999
Department of Biochemistry, Faculty of Science, Charles University Prague, Praha, Czech Republic.
The complete covalent structure of a novel boar DQH sperm surface protein resistant to many classical procedures of enzymatic fragmentation was determined. The relative molecular mass of the major form of this protein determined by ESI-MS and MALDI-MS was 13,065.2+/-1.
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