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Related Concept Videos

RNA Interference01:23

RNA Interference

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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The basic structure of RNA consists of a five-carbon sugar and one of four nitrogenous bases. Although most RNA is single-stranded, it can form complex secondary and tertiary structures. Such structures play essential roles in the regulation of transcription and translation.
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RNA Stability

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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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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
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RNA Editing02:23

RNA Editing

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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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RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
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RNA Catalyst as a Reporter for Screening Drugs against RNA Editing in Trypanosomes
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Small RNA Profiling in Trypanosomes.

Florencia Díaz-Viraqué1, Gonzalo Greif1, María Rosa García-Silva1

  • 1Laboratorio de Interacciones Hospedero-Patógeno-UBM, Institut Pasteur de Montevideo, Montevideo, Uruguay.

Methods in Molecular Biology (Clifton, N.J.)
|February 2, 2026
PubMed
Summary
This summary is machine-generated.

This study details a method for analyzing small RNAs in trypanosomes, crucial for understanding parasite biology and host interactions. The protocol ensures accurate sequencing of these regulatory molecules.

Keywords:
Next-generation sequencingNon-coding RNAsProtist parasitesSmall RNAsTrypanosomes

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Area of Science:

  • Parasitology
  • Molecular Biology
  • Genomics

Background:

  • Trypanosomatids possess a wide array of small non-coding RNAs, despite lacking canonical RNA interference pathways.
  • These small RNAs, including tRNA and rRNA fragments, are implicated in regulating parasite functions and host-parasite dynamics.

Purpose of the Study:

  • To present a comprehensive protocol for the isolation, library preparation, sequencing, and analysis of small RNAs in trypanosomes.
  • To optimize methods for preserving short RNA species and minimizing experimental artifacts.

Main Methods:

  • Detailed protocol for small RNA isolation and library construction.
  • Inclusion of quality control and size selection steps.
  • Bioinformatic analysis pipeline for sequencing data.

Main Results:

  • Optimized method for preserving short RNA species.
  • Minimized artifacts like adaptor dimers and concatemerization.
  • High-quality libraries suitable for studying trypanosome small RNA transcriptomes.

Conclusions:

  • The described protocol enables robust study of small RNA repertoires in trypanosomes.
  • Facilitates research into the regulatory roles of small RNAs in parasite biology.
  • Aids in understanding host-parasite interactions through small RNA analysis.