Assaf, Andrei, and Sara publish a review on non-canonical roles of tRNAs and tRNA mimics.

Non-canonical roles of tRNAs and tRNA mimics in bacterial cell biology.
Assaf Katz, Sara Elgamal, Andrei Rajkovic, Michael Ibba.

http://onlinelibrary.wiley.com/doi/10.1111/mmi.13419/abstract