DNA structures and its siblings

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Discussion Overview

The discussion centers around the structural differences and similarities between Peptide Nucleic Acid (PNA) and Morpholino, as well as their applications in gene silencing and other genetic manipulations. Participants explore the characteristics of these nucleic acid analogs and their potential uses in biological research.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant expresses confusion regarding the structural similarities between PNA and Morpholino, noting that Morpholino has a ring structure similar to DNA, while PNA lacks rings.
  • Another participant explains that PNA has a synthetic peptide backbone made from N-(2-amino-ethyl)-glycine units, which results in an achiral and uncharged structure.
  • A question is raised about the applications of PNA as a nucleic acid analog.
  • Applications mentioned include gene silencing, inhibition of translation, and gene-specific expression.
  • It is noted that PNA can bind to regular nucleic acids, potentially disrupting their function, and that there are synthetic nucleic acids resembling RNA that are stable and can be used for RNA interference (RNAi) probes.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the structural similarities between PNA and Morpholino, and there are multiple viewpoints regarding the applications and mechanisms of these nucleic acid analogs.

Contextual Notes

Some assumptions about the structural characteristics of PNA and Morpholino may not be fully explored, and the discussion does not resolve the specifics of how these molecules interact with regular nucleic acids.

Pattielli
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I would like to ask a question about PNA and Morpholino... I am sorry, I look at their structure images but I still couldn't see anything that can be called similarities. The Morpholino has ring structure which is the same as DNA but PNA has no rings at all...

Would you please explain a little more about this for me ?

Thank you very much,
 
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Peptide nucleic acide (PNA) is a nucleic acid analog in which the sugar phosphate backbone of natural nucleic acid has been replaced by a synthetic peptide backbone usually formed from N-(2-amino-ethyl)-glycine units, resulting in an achiral and uncharged mimic.

http://people.bu.edu/hkuhn/images/FASEB_review.pdf
 
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So what would be the applications of this PNA nucleic acid analog?
 
Gene silencing, Inhibition of translation and gene specific expression.

http://www.cell-research.com/20042/111.pdf
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=19253
 
Last edited by a moderator:
The molecule is able to bind to regular nucleic acids and thereby disturbs their function, what I understand from a quick look. There are also synthetic nucleic acids that look like RNA, but cannot degraded, thus stable RNAi probes can be made from those, which in turn are used for gene silencing. Apparently two different approaches with synthetic nucleic acids?
 

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