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Related Concept Videos

RNA Structure01:19

RNA Structure

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The basic structure of RNA consists of a string of ribonucleotides attached by phosphodiester bonds. 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.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA) involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three...
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RNA Structure01:23

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Overview
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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Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

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In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
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Cooperative Binding of Transcription Regulators02:13

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Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
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RNA Stability01:53

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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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.
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Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation
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Crowding Effects in RNA Interactions.

Francesco A Aprile1,2, Annalisa Pastore3,4,5,6

  • 1Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, UK. f.aprile@imperial.ac.uk.

Methods in Molecular Biology (Clifton, N.J.)
|January 1, 2026
PubMed
Summary
This summary is machine-generated.

Molecular crowding, caused by high concentrations of molecules, impacts RNA behavior. This chapter explores RNA

Keywords:
BiochemistryBiophysicsConfinementCrowdingPhase separation

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Area of Science:

  • Biochemistry and Molecular Biology
  • Cellular Biophysics

Background:

  • Molecular crowding is a biophysical phenomenon where high concentrations of macromolecules restrict molecular movement.
  • This excluded volume effect significantly alters the behavior and properties of molecules in solution, including RNA.
  • Understanding these effects is crucial for comprehending cellular processes.

Purpose of the Study:

  • To elucidate the intricate relationship between RNA and molecular crowding.
  • To detail methodologies for investigating RNA-crowding interactions.
  • To present techniques for isolating and analyzing granules involved in these processes.

Main Methods:

  • Review of techniques for studying molecular crowding effects on RNA.
  • Description of methods for RNA granule extraction.
  • Analysis of granule components.

Main Results:

  • RNA is both influenced by and influences molecular crowding.
  • Specific techniques enable the study of these complex interactions.
  • Granule extraction facilitates component analysis.

Conclusions:

  • The interplay between RNA and molecular crowding is a significant factor in molecular behavior.
  • Advanced techniques are available to probe these phenomena.
  • Further analysis of extracted granules will enhance understanding of cellular components and processes.