User:ElNando888/Static Cloud Labs/CL-V.GU Closing

From Eterna Wiki

Tetraloops closed by UG or GU aren't numerous on FRABASE. I selected following ones.

 

UAGG

 

Tetraloop GU closing 1.png

 

AAGC

 

Tetraloop GU closing 2.png

 

Interestingly, both structures are very reminiscent of the GNRA tetraloop family.

 

Links

 

Results

Negative in both cases. It can be argued that no tetraloops tried at 25-30 actually worked in the whole round, but that's about it.

Maybe this could be seen as a nice way to get SHAPE-score-efficient hexaloops...

Possibly, this could be indicative that tetraloops closed by GU pairs require a solid "backing" pair, and possibly that more pairs in the supporting stack are involved in the local stability of the structure (thus contradicting slightly the nearest neighbor model we're using...)