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- W160256774 abstract "Streptococcus pneumoniae is one of the most important human pathogens and amajor cause of morbidity and mortality worldwide, causing respiratory tract infections,community acquired pneumonia, and invasive diseases.Although the pneumococcus is a well studied bacterial pathogen, first described in thelate 19th century, pili on its surface were discovered only recently. Pili are elongatedstructures protruding from the bacterial surface and found to be important virulencefactors in both Gram-positive and Gram-negative bacteria. In contrast to Gramnegativepili, little was known about the structure of Gram-positive pili. In the recentyears the structure and function of the first pilus type (pilus-1) has been elucidatedand a second pilus type (pilus-2) in S.pneumoniae has been characterized. Here wedescribe the genomic organization of a second PI, PI-2, identified in the partialgenome sequence of a serotype 1 S. pneumoniae strain (INV104). Furthermore weprovide experimental evidence that PitB is the backbone protein forming the pilus-2shaft. We also confirm that both the sortase SrtG1 and the signal peptidase-relatedprotein SipA, are necessary for assembly and polymerization of the pilus. In order tostudy the pneumococcal pilus in detail, a purification procedure was set up to obtainpure native pili preparations. Pneumococcal pili were isolated from strain PN110,bacteria that in low-dose EM showed individual pili and bundles of individual pili onthe bacterial cell surface." @default.
- W160256774 created "2016-06-24" @default.
- W160256774 creator A5004081884 @default.
- W160256774 date "2010-01-26" @default.
- W160256774 modified "2023-09-27" @default.
- W160256774 title "Structural and functional characterization of second pilus type inStreptococcus pneumoniae" @default.
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