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Related Concept Videos

RNA Structure01:19

RNA Structure

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...
RNA Structure01:23

RNA Structure

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...
RNA Structure01:23

RNA Structure

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...
Nucleic Acid Structure01:25

Nucleic Acid Structure

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
DNA has a double-helix structure. The...
RNA Stability01:53

RNA Stability

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...
RNA Stability01:53

RNA Stability

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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Related Experiment Video

Updated: Jun 23, 2026

Nanomanipulation of Single RNA Molecules by Optical Tweezers
06:59

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Published on: August 20, 2014

Constraint counting on RNA structures: linking flexibility and function.

Simone Fulle1, Holger Gohlke

  • 1Department of Biological Sciences, Molecular Bioinformatics Group, Goethe-University, Frankfurt, Germany.

Methods (San Diego, Calif.)
|April 29, 2009
PubMed
Summary
This summary is machine-generated.

Constraint counting efficiently reveals RNA flexibility. This method, applied to the ribosomal exit tunnel, offers insights into co-translational processes.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Computational Biology

Background:

  • RNA molecules are dynamic and undergo conformational changes crucial for their functions.
  • Constraint counting on topological networks offers insights into biomolecular flexibility.
  • This method was previously successful in analyzing protein structures.

Purpose of the Study:

  • To extend constraint counting methods for analyzing RNA structures.
  • To investigate the flexibility and stability of the ribosomal exit tunnel.
  • To correlate structural flexibility with co-translational processes.

Main Methods:

  • Representing RNA structures as topological networks with atoms as vertices and bonds/constraints as edges.
  • Applying constraint counting to analyze the rigidity and flexibility of RNA regions.
  • Case study analysis of the ribosomal exit tunnel's stability characteristics.

Main Results:

  • The constraint counting approach effectively identifies flexible and rigid regions in RNA.
  • Stability characteristics of the ribosomal exit tunnel were quantitatively assessed.
  • Findings provide a link between the tunnel's structural properties and its function.

Conclusions:

  • Constraint counting is a valuable tool for understanding RNA structural dynamics.
  • The study elucidates the role of RNA flexibility in biological processes.
  • This approach aids in understanding the functional mechanisms of complex RNA structures like the ribosomal exit tunnel.