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J. Bacteriol., Jan 1996, 537-541, Vol 178, No. 2
GJ Veenstra, FF Cremers, H van Dijk and A Fleer
Coagulase-negative staphylococci have emerged as important pathogens in
infections associated with intravascular devices. Microbial adherence to
biomaterial surfaces is a crucial step in the pathogenesis of these
infections. Staphylococcal surface proteins (herein referred to as SSP- 1
and SSP-2) are involved in the attachment of Staphylococcus epidermidis 354
to polystyrene. In the present study we show that the adhesin protrudes
from the cell surface as a fimbria-like polymer. Furthermore, in vitro
proteolytic cleavage of SSP-1 produces an SSP-2- like protein which
coincides with a loss of adhesive function. SSP-1 expression is
down-regulated in a phenotypical variant of S. epidermidis 354 whereas
SSP-2 expression is not. These results could suggest that proteolytic
cleavage is a key to the regulation of the adhesive state of S. epidermidis
in vivo.
Copyright © 1996, American Society for Microbiology
Ultrastructural organization and regulation of a biomaterial adhesin of Staphylococcus epidermidis
Eijkman-Winkler Institute of Clinical and Medical Microbiology, Faculty of Medicine, Utrecht, The Netherlands.
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