Analysis of plasmid deoxyribonucleic acid in a cariogenic strain of Streptococcus faecalis: an approach to identifying genetic determinants on cryptic plasmids.

AUTOR(ES)

Oliver, D R

RESUMO

Streptococcus faecalis strains ND539 and OG1 have been previously shown to be cariogenic in gnotobiotic animals. Deoxyribonucleic acid analyses have revealed the presence of a single 26-megadalton plasmid designated pAM539 in the former strain, whereas the latter strain was found to be plasmid-free. By gene transfer experiments, it was possible to construct isogenic pairs of strains that differed only with regard to the presence or absence of pAM539. Comparative studies of isogenic pairs showed that the presence of pAM539 conferred bacterial sensitivity to a bacteriocin produced by S. faecalis strain 5952.

Documentos Relacionados

• Characterization of Three Plasmid Deoxyribonucleic Acid Molecules in a Strain of Streptococcus faecalis: Identification of a Plasmid Determining Erythromycin Resistance
• Method for the genetic labeling of cryptic plasmids.
• Transformation of Streptococcus sanguis Challis by plasmid deoxyribonucleic acid from Streptococcus faecalis.
• Sex pheromone cAD1 in Streptococcus faecalis: induction of a function related to plasmid transfer.
• New R plasmid-mediated restriction-modification system of deoxyribonucleic acid conferred by group E R plasmids.