TfoR RNA
In the fellow gammaproteobacterium Vibrio cholera, a different RNA regulatory system is used. Here, an sRNA named 'tfoR' positively regulates expression of the sxy (tfoX) protein.
The RNA element responds to chitin, which is an important regulator of competence in V. cholera. Deletion of tfoR removed all competence for exogenous DNA in V. cholera in vivo.
Read more about this topic: Sxy 5' UTR Element