Characterization of the Porphyromonas gingivalis conjugative transposon CTnPg1: the gene transfer among oral bacteria and CTnPg1-like family CTns.

共轭转座子（Conjugative transposon，CTn）是牙龈卟啉单胞菌（Porphyromonas gingivalis）的一种移动的元件。CTnPg1不通过转化和转导而在活菌间转移。CTnPg1样CTns存在于构成人体口腔和肠道生物膜的厌氧菌中。这些结果表明CTnPg1和CTnPg1样CTns在口腔和肠道细菌中广泛分布并活跃转移。

Conjugative transposon (CTn), CTnPg1 was one of mobile elements that were defined from Porphyromonas gingivalis. CTnPg1 can transfer among live bacteria not by transformation and transduction. CTnPg1-like CTns were found in anaerobic bacteria that composed biofilms in human oral and intestines. These result suggested that CTnPg1 and CTnPg1-like CTns are widely distributed and actively transfered among oral and intestinal bacteria.