POLYPEPTIDES CONTAINING POLYMORPHISMS OF THE REPEATED REGIONS OF PERTACTIN IN BORDETELLA PERTUSSIS, BORDETELLA PARAPERTUSSIS AND BORDETELLA BRONCHISEPTICA. THEIR USE IN DIAGNOSTICS, AND IN IMMUNOGENIC COMPOSITIONS

摘要

Pertactin (PRN) is an outer membrane protein expressed by iBordetella pertussis/i, iBordetella parapertussis/i, and iBordetella bronchiseptica/i, which induces protective immunity to iBordetella/i infections. The immunodominant and immunoprotective epitopes of pertactin include two repeated regions, I and II. Comparison of these two repeated regions showed the pertactin of iB. parapertussis/i) is invariant, whereas the pertactin of iB. pertussis/i varies mostly in region I and iB. bronchiseptica/i varies in both the repeated regions I and II. Compositions containing pertactins and pertactin fragments containing variant sequences in these regions are useful as immunogenic compositions.