I've been learning about the ClipXP, ClipAP, and Lon proteases. They are proteases from the AAA+ family, which seek out proteins tagged with certain peptide sequences, unfold them, and chop them up.

But what happens when you tag a protease with its own degradation tag? For example, what if you took DNA encoding mf-Lon and added its ssrA tag to the end, and then expressed this sequence in bacteria?

Would this result in any interesting dynamics? Will the protease start trying to degrade itself like an Ouroboros? Will it get stuck trying to do so? Will we observe any interesting dynamics when we incorporate this into a gene circuit?

  • 2
    $\begingroup$ The proteases would presumably degrade each other. $\endgroup$ – canadianer Jul 7 '17 at 15:49
  • $\begingroup$ Yeah @canadianer. But I wonder if anything would be different from normal protein degradation. Maybe the protease concentration may have a lower and perhaps more stable steady state? Perhaps because the protease is evolved to degrade other protein, it might be more tightly folded and hence harder to degrade? Might it even get stuck trying to do so? what if two proteases bite each other 69 style? $\endgroup$ – Cedar Jul 7 '17 at 21:29

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.