title: Evaluation of the effects of Streptococcus mutans chaperones and protein secretion machinery components on cell surface protein biogenesis, competence, and mutacin production.
abstract: The respective contributions of components of the protein translocation/maturation machinery to cell surface biogenesis in Streptococcus mutans are not fully understood. Here we used a genetic approach to characterize the effects of deletion of genes encoding the ribosome-associated chaperone RopA (Trigger Factor), the surface-localized foldase PrsA, and the membrane-localized chaperone insertases YidC1 and YidC2, both singly and in combination, on bacterial growth, chain length, self-aggregation, cell surface hydrophobicity, autolysis, and antigenicity of surface proteins P1 (AgI/II, PAc), WapA, GbpC, and GtfD. The single and double deletion mutants, as well as additional mutant strains lacking components of the signal recognition particle pathway, were also evaluated for their effects on mutacin production and genetic competence.
authors.affiliation: Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL, USA.
authors.forename: P J
authors.initials: PJ
authors.lastname: Crowley
authors.affiliation: Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL, USA.
authors.forename: L J
authors.initials: LJ
authors.lastname: Brady
mesh_terms: D000942:Antigens, Bacterial / Q000235:genetics; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D001430:Bacteriocins / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D002462:Cell Membrane / Q000378:metabolism; D005964:Glucosyltransferases / Q000378:metabolism; D008074:Lipoproteins / Q000235:genetics / Q000378:metabolism; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D026901:Membrane Transport Proteins / Q000235:genetics / Q000378:metabolism; D018832:Molecular Chaperones / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D014176:Protein Biosynthesis; D017384:Sequence Deletion; D018271:Signal Recognition Particle / Q000378:metabolism; D013295:Streptococcus mutans / Q000235:genetics / Q000378:metabolism / Q000502:physiology*
chemical_list: D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D001430:Bacteriocins; D008074:Lipoproteins; D008565:Membrane Proteins; D026901:Membrane Transport Proteins; D018832:Molecular Chaperones; C095456:RopA protein, bacteria; D018271:Signal Recognition Particle; C082160:prsA protein, bacteria; D005964:Glucosyltransferases; C113848:glucosyltransferase D
keywords: Streptococcus; autolysis; competence; monoclonal antibodies; mutacin production; protein maturation