title: Identification of an amyloidogenic peptide from the Bap protein of Staphylococcus epidermidis.
abstract: Biofilm associated proteins (Bap) are involved in the biofilm formation process of several bacterial species. The sequence STVTVT is present in Bap proteins expressed by many Staphylococcus species, Acinetobacter baumanii and Salmonella enterica. The peptide STVTVTF derived from the C-repeat of the Bap protein from Staphylococcus epidermidis was selected through the AGGRESCAN, PASTA, and TANGO software prediction of protein aggregation and formation of amyloid fibers. We characterized the self-assembly properties of the peptide STVTVTF by different methods: in the presence of the peptide, we observed an increase in the fluorescence intensity of Thioflavin T; many intermolecular β-sheets and fibers were spontaneously formed in peptide preparations as observed by infrared spectroscopy and atomic force microscopy analyses. In conclusion, a 7 amino acids peptide derived from the C-repeat of the Bap protein was sufficient for the spontaneous formation of amyloid fibers. The possible involvement of this amyloidogenic sequence in protein-protein interactions is discussed.
authors.forename: Pierre
authors.initials: P
authors.lastname: Lembré
authors.forename: Charlotte
authors.initials: C
authors.lastname: Vendrely
authors.affiliation: Laboratoire ERRMECe- EA1391, Institut des matériaux-FD4122, Université de Cergy-Pontoise, 2, avenue Adolphe Chauvin, 95302 Cergy-Pontoise Cedex, France. martino@u-cergy.fr.
authors.forename: Patrick Di
authors.initials: PD
authors.lastname: Martino
mesh_terms: D058227:Amyloidogenic Proteins / Q000737:chemistry*; D001426:Bacterial Proteins / Q000737:chemistry*; D052160:Benzothiazoles; D018441:Biofilms; D008565:Membrane Proteins / Q000737:chemistry; D018625:Microscopy, Atomic Force; D013055:Spectrophotometry, Infrared; D013212:Staphylococcus epidermidis / Q000378:metabolism*; D013844:Thiazoles / Q000737:chemistry
chemical_list: D058227:Amyloidogenic Proteins; D001426:Bacterial Proteins; D052160:Benzothiazoles; D008565:Membrane Proteins; D013844:Thiazoles; C009462:thioflavin T