Comparative sequence analysis of pPATH pathogenicity plasmids in gall-forming bacteria.

Acquisition of the pathogenicity plasmid pPATH that encodes a type III secretion system (T3SS) and effectors (T3Es) has likely led to the transition of a non-pathogenic bacterium into the tumorigenic pathogen . pv. () forms galls on gypsophila () and triggers immunity on sugar beet (), while pv.