RNA and Histones: Can a Duplex Wrap Around a Histone?

[muadib2k]

Hey,

I'm just wondering if it would be possible for a RNA duplex wrap itself around a histone, like a DNA duplex can ? My personal guess is that it should be able to do so, since the differences between RNA and DNA aren't that large (2'-OH and one different base).

What do you guys think ?
Thanks,

 

[Monique]

The RNA base might not be that different, but the way the molecule folds into a helix and the way it forms a three-dimensional molecule with lots of hairpins is actually very different from DNA.

 

[muadib2k]

Do you know if any research has been done on this subject ? Maybe something that would be found online ?

Thanks,

 

[Monique]

Well, actually RNA does not form a double stranded helix like DNA does. Eukaryotic organisms have a defensive mechanism by which they break down dsRNA, because viruses DO use dsRNA (thus it is recognized as foreign). Rather RNA forms very complex internal hybridizations, a simple example http://www.santafe.edu/images/rna.gif" . So RNA does not form a duplex, but more a complex stem-loop structure.

Thus I'd think it won't wrap around a histone (but I have to admit I don't know too much about dna-histone interaction (which now I'm going to change soon)).