Abstract
Our previous reports implicated the Hsp90 homologue (HtpG) of Porphyromonas gingivalis ( Pg) in its virulence in periodontal disease. We investigated the role of the HtpG stress protein in the virulence of Pg. This report describes the (i) expression of a recombinant Pg HtpG (rHtpG), (ii) generation and characterization of a polyclonal rabbit anti- Pg rHtpG antiserum, and (iii) construction of a Pg htpG isogenic mutant and evaluation of the growth, adherence and invasion properties compared to the wild-type parental strain. The disruption of the htpG gene did not significantly affect growth, and had no effect on Pg adherence to and invasion of cultured human cells.
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