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Nucleic acids02:43

Nucleic acids

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Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
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Peptide nucleic acids: Advanced tools for biomedical applications.

Anjali Gupta1, Anuradha Mishra2, Nidhi Puri3

  • 1Department of Chemistry, School of Basic and Applied Sciences, Galgotias University, Greater Noida, U.P., India.

Journal of Biotechnology
|August 3, 2017
PubMed
Summary

Peptide Nucleic Acids (PNAs) offer stable hybridization and resistance to degradation, making them valuable tools. Research explores their use in diagnostics and pharmaceuticals, though cellular uptake requires improvement.

Keywords:
AntigeneAntisenseBiosensorHybridizationPCRPNA

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Medicinal Chemistry

Background:

  • Peptide Nucleic Acids (PNAs) are synthetic analogues of DNA/RNA with a neutral N-2-aminoethylglycine backbone.
  • This neutral backbone confers remarkable hybridization stability and resistance to enzymatic/chemical degradation.
  • PNAs are recognized for their potential in therapeutic and diagnostic applications.

Purpose of the Study:

  • To review the hybridization properties of PNAs.
  • To elaborate on the potential applications of PNAs in diagnostics and pharmaceuticals.
  • To discuss challenges and potential solutions for PNA cellular uptake.

Main Methods:

  • Literature review focusing on PNA hybridization and applications.
  • Analysis of PNA stability and resistance mechanisms.
  • Discussion of PNA-based therapeutic and diagnostic strategies.

Main Results:

  • PNAs exhibit superior hybridization stability compared to DNA/RNA due to their neutral backbone.
  • PNAs are resistant to cellular degradation, enabling applications in antisense and antigene therapies.
  • PNA/DNA/PNA triplex formation and PNA's ability to replace DNA probes are highlighted.
  • Cellular uptake remains a challenge, necessitating backbone modifications or peptide conjugation.

Conclusions:

  • PNAs possess unique properties making them promising for diagnostics and pharmaceuticals.
  • Further research into improving PNA delivery is crucial for realizing their full therapeutic potential.
  • PNAs represent a significant advancement in nucleic acid analogue technology.