Table 3.

Effects of mutations upstream of the fimA −35 region on promoter activity

P. gingivalis strainRelative % β-galactosidase levelaRatiob
34°C37°C39°C34°C37°C39°C
UPF230100532.310.5
MP1502006637310.56
MP6018046373.910.8
MP5915040323.7510.8
  • a The 100% activity is 250 ± 60 Miller units of β-galactosidase, which was obtained as P. gingivalis UPF grew at 37°C to log-phase growth.

  • b Ratio of fimA promoter activity following growth at 34 or 39°C compared to that at 37°C.