title: Characterization of cell wall associated proteins of a Staphylococcus aureus isolated from bovine mastitis case by a proteomic approach.
abstract: Staphylococcus aureus causes different pathologies in humans and animals. In particular, it is involved in intramammary infections in cows, causing economic losses and milk-safety problems. Although it is well-known that surface components (proteins and capsular polysaccharides) and exotoxins are virulence factors involved in the pathogenesis of bovine mastitis, less is known about the precise biochemical identity of such molecules. Therefore, mapping of surface proteins using specific disease- and environment-isolates provides a benchmark for strain comparison of pathogens with different pathogenic characteristics and antibiotic resistance mechanism and can aid in defining specific vaccine and therapeutic targets. In this study, we used a proteomic approach on protein extracts of lysostaphin-treated S. aureus in isotonic conditions, to produce a reproducible and well resolved 2-D electrophoresis (2-DE) reference map of surface associated proteins of isolated S. aureus from a case of bovine mastitis. The most abundant protein components were identified by Matrix assisted laser desorption ionisation-time of flight (MALDI-TOF) mass spectrometry.
authors.affiliation: Department of Animal Pathology, Hygiene and Health (DIPAV), University of Milano, Via Celoria 10, 20133 Milano, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Taverna
authors.forename: Armando
authors.initials: A
authors.lastname: Negri
authors.forename: Renata
authors.initials: R
authors.lastname: Piccinini
authors.forename: Alfonso
authors.initials: A
authors.lastname: Zecconi
authors.forename: Simona
authors.initials: S
authors.lastname: Nonnis
authors.forename: Severino
authors.initials: S
authors.lastname: Ronchi
authors.forename: Gabriella
authors.initials: G
authors.lastname: Tedeschi
mesh_terms: D000818:Animals; D001426:Bacterial Proteins / Q000737:chemistry*; D002417:Cattle; D002473:Cell Wall / Q000737:chemistry; D015180:Electrophoresis, Gel, Two-Dimensional / Q000662:veterinary; D005098:Exotoxins / Q000737:chemistry*; D005260:Female; D008414:Mastitis, Bovine / Q000382:microbiology*; D040901:Proteomics / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods / Q000662:veterinary; D013203:Staphylococcal Infections / Q000382:microbiology / Q000662:veterinary*; D013211:Staphylococcus aureus / Q000378:metabolism* / Q000472:pathogenicity; D014774:Virulence
chemical_list: D001426:Bacterial Proteins; D005098:Exotoxins