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RNA Structure01:23

RNA Structure

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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.
Different Types of RNA Have the Same Basic Structure
There are three main types of ribonucleic acid (RNA): messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). All three RNA types consist of a...
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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.
DNA Structure
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ER is the primary site for the maturation and folding of soluble and transmembrane secretory proteins. The calnexin cycle is a specific chaperone system that folds and assesses the confirmation of N-glycosylated proteins before they can exit the ER lumen. The primary players of this quality check pipeline are the lectins, ER-resident chaperones, and a glucosyl transferase enzyme. In case the calnexin system in the lumen fails to salvage a misfolded protein, it is transported to the cytoplasm...
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Related Experiment Video

Updated: Apr 2, 2026

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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ARNy plotter: A comprehensive web server for RNA ensemble structural analysis and visualization.

Louis Meuret1, Julien Rey1,2, Samuela Pasquali1

  • 1Université Paris Cité, CNRS UMR 8251, Inserm ERL 1133, Unité de Biologie Fonctionnelle et Adaptative, Paris, France.

Plos Computational Biology
|March 31, 2026
PubMed
Summary
This summary is machine-generated.

ARny Plotter is a new web platform for analyzing RNA structural ensembles. It offers comprehensive visualization and analysis of RNA dynamics, aiding RNA structural biology research.

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Area of Science:

  • Structural Biology
  • Computational Biology
  • Bioinformatics

Background:

  • RNA molecules exhibit significant flexibility and diverse conformational landscapes, posing challenges for structural analysis.
  • Existing tools often focus on static structures or offer limited dynamic analysis capabilities.

Purpose of the Study:

  • To present ARNy Plotter, a user-friendly web platform for comprehensive analysis and visualization of RNA structural ensembles.
  • To provide an integrated environment for exploring RNA dynamics and conformational heterogeneity.

Main Methods:

  • ARny Plotter integrates multiple analysis methods including RMSD/eRMSD distributions, torsion-angle variability, dynamic secondary structures, and contact networks.
  • The platform leverages MDAnalysis, Barnaba, and foRNA for data processing and MolStar for real-time 3D visualization.
  • Supports all major trajectory and ensemble formats, with options for offline use and an API for automated figure generation.

Main Results:

  • Enables intuitive examination of various aspects of RNA structural ensembles, including conformational landscapes and population distributions.
  • Facilitates in-depth exploration of conformational transitions and dynamic patterns within RNA structures.
  • Allows for sharing of results without distributing large datasets.

Conclusions:

  • ARny Plotter addresses the need for accessible, comprehensive, and interactive tools in RNA structural biology.
  • The platform enhances the study of RNA dynamics and conformational ensembles.
  • Freely available online and supports offline use, promoting wider adoption in the research community.