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

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Discussion Overview

The discussion centers on the possibility of an RNA duplex wrapping around a histone, similar to the way a DNA duplex interacts with histones. Participants explore the structural differences between RNA and DNA, as well as the implications for RNA's ability to form such interactions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that an RNA duplex should be able to wrap around a histone due to the similarities between RNA and DNA, specifically mentioning the minor differences in structure.
  • Another participant counters that while the RNA base is similar, the folding and three-dimensional structure of RNA is significantly different from that of DNA, which may affect its ability to wrap around histones.
  • A request for existing research on the topic is made, indicating a desire for more information on RNA-histone interactions.
  • It is noted that RNA does not form a double-stranded helix like DNA, and instead forms complex structures, which may limit its ability to wrap around histones.

Areas of Agreement / Disagreement

Participants express differing views on the ability of RNA to wrap around histones, with no consensus reached on the matter. Some participants highlight the structural differences that may prevent such interactions, while others remain open to the possibility.

Contextual Notes

There are limitations regarding the understanding of RNA-histone interactions, particularly in terms of the specific mechanisms and structural implications that may influence this potential relationship.

muadib2k
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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,
 
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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.
 
Do you know if any research has been done on this subject ? Maybe something that would be found online ?

Thanks,
 
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)).
 
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