The traJ gene encodes a protein required for transcription from the major transfer promoter, pY. The FinO protein is essential for effective repression, acting by binding to FinP and protecting it from RNase E degradation.
A specific gene, traJ, is responsible for encoding a protein essential for initiating transcription from the primary transfer operator, pY. Furthermore, the FinO protein plays a vital role in repressing this process, doing so by forming a complex with FinP and preventing its breakdown by RNase E.