TABLE 1.
Bacterial strains and plasmids used
| Strain or plasmid | Description | Reference or source |
|---|---|---|
| Strains | ||
| E. faecalis | ||
| OG1X | str gel | 29 |
| JH2-2 | rif fus | 32 |
| FA2-2 | rif fus | 14 |
| DS16 | Clinical isolate; carries pAD1 and pAD2 | 14 |
| 39-5 | Clinical isolate; carries pPD1 and 5 other plasmids | 51 |
| FA373 | FA2-2 carrying pAM373; Tn918(tet) on chromosome | 12 |
| FA3328 | OG1X eep mutant (OG1X containing integrated pAM3328) | This study |
| FA3328R | Revertant of FA3328 that had lost erm | This study |
| FA3329 | OG1X eep mutant (OG1X containing integrated pAM3329) | This study |
| FA3329R | Revertant of FA3329 that had lost erm | This study |
| E. coli DH5α | F− φ80 lacZΔM15 endA1 recA1 hsdR17(rK− mK+) supE44 thi-1 ΔgyrA96 (ΔlacZYA-argF)U169 | Promega Research Labs |
| Plasmids | ||
| pAD1 | 60 kb; encodes hemolysin/bacteriocin (cytolysin); responds to cAD1; originally found in DS16 | 14 |
| pAM2011 | pAD1::Tn917lac with insert 4 bp downstream from t2 | 41 |
| pAM2011E | Miniplasmid derivative representing large EcoRI fragment of pAM2011 | 46 |
| pPD1 | Encodes bacteriocin; responds to cPD1 pheromone | 51 |
| pOB1 | Encodes hemolysin/bacteriocin; responds to cOB1 pheromone | 39 |
| pCF10 | Carries Tn925 (tet); responds to cCF10 pheromone | 19 |
| pAM373 | Encodes response to cAM373 pheromone | 12 |
| pAM401 | E. coli-E. faecalis shuttle; cat tet | 50 |
| pBluescript SK+ II | E. coli plasmid vector; amp | Stratagene |
| pVA891 | E. coli plasmid vector; erm cat | 34 |
| pAM3325 | pAM401 derivative with 3,045-bp cloned from E. faecalis OG1X | This study |
| pAM3326 | pBluescript derivative with 3,045-bp fragment subcloned from pAM3325 | This study |
| pAM3327 | pAM401 derivative with PCR product representing ORF1 (eep) | This study |
| pAM3328 | pVA891 derivative with PCR fragment representing internal segment of eep | This study |
| pAM3329 | pVA891 derivative with PCR fragment representing internal segment of eep (fragment in opposite orientation compared to pAM3328) | This study |