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RNA Editing02:23

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RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
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One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
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Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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DNAzyme-dependent Analysis of rRNA 2&#8217;-O-Methylation
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Catalysts for RNA and DNA modification.

Dennis Gillingham1, Ramla Shahid2

  • 1St. Johanns-Ring 19, Basel 4056, Switzerland.

Current Opinion in Chemical Biology
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Chemists are developing catalytic methods to chemically modify deoxyribonucleic acids (DNAs) and ribonucleic acids (RNAs). This review summarizes current catalytic strategies and identifies future research directions for nucleic acid modification.

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Area of Science:

  • Chemistry
  • Biochemistry
  • Molecular Biology

Background:

  • Chemical modification of deoxyribonucleic acids (DNAs) and ribonucleic acids (RNAs) is crucial for studying these nucleic acids.
  • Nature employs selective catalysts for nucleic acid modification, inspiring chemical approaches.

Purpose of the Study:

  • To review catalytic methods for synthesizing modified DNAs and RNAs.
  • To identify areas requiring further research in nucleic acid modification.

Main Methods:

  • Literature review of catalytic approaches for nucleic acid modification.
  • Analysis of current strategies and future research needs.

Main Results:

  • Summary of various catalytic strategies for constructing modified nucleic acids.
  • Identification of gaps and opportunities in the field.

Conclusions:

  • Catalytic methods offer promising avenues for efficient and selective nucleic acid modification.
  • Further research is needed to advance catalytic approaches for DNA and RNA synthesis.