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- W3086231811 abstract "Abstract Abiotrophia defectiva is a species of nutritionally variant streptococci that is found in human saliva and dental plaques and that has been associated with infective endocarditis. In our previous study, it was found that A. defectiva could bind specifically to saliva‐coated hydroxyapatite beads (SHA). This study identified a cell surface component of A. defectiva that promotes adherence to SHA beads. The binding of A. defectiva to SHA was reduced in the presence of antibodies against human proline‐rich protein (PRP); these results suggested that PRP may be a critical component mediating interactions between A. defectiva and the salivary pellicle. Two‐dimensional gel electrophoresis of whole A. defectiva cells followed by Far‐Western blotting was conducted by probing with synthetic peptides analogous to the binding region of PRP known as PRP‐C. The results indicate that an A. defectiva protein of 37 kDa interacts with PRP‐C. The results of amino‐terminal sequencing of the adhesive A. defectiva protein revealed significant similarity to glyceraldehyde‐3‐phosphate dehydrogenase (GAPDH). Recombinant GAPDH bound to immobilized PRP‐C in a dose‐dependent manner and binding of A. defectiva to SHA or to PRP was reduced in the presence of anti‐GAPDH antiserum. Western blotting or electron immunomicroscopic observations with anti‐GAPDH antiserum revealed that this protein was expressed in both cytosolic and cell wall fractions. These results suggest that A. defectiva could specifically bind to PRP via interactions with cell surface GAPDH; the findings suggest a mechanism underlying A. defectiva ‐mediated adherence to saliva‐coated tooth surfaces." @default.
- W3086231811 created "2020-09-21" @default.
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- W3086231811 date "2020-10-08" @default.
- W3086231811 modified "2023-10-01" @default.
- W3086231811 title "<i>Abiotrophia defectiva</i> adhere to saliva‐coated hydroxyapatite beads via interactions between salivary proline‐rich‐proteins and bacterial glyceraldehyde‐3‐phosphate dehydrogenase" @default.
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- W3086231811 doi "https://doi.org/10.1111/1348-0421.12848" @default.
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