Is there any evidence that would indicate that this has ever occurred? The way I think about these things is in terms of where the electron density tends to be, what fits into what, how things get recycled inside our cells (Ubiquitin, Cytochrome P450, etc.), so on and so forth. It has been awhile since I looked, last I checked, we don't know how badly-folded prions spread the pattern to other prions. I'd love to know if there is any news on that.
Given the above, I would guess that there's no link at all between the two. I could just be very wrong or behind the times.
