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Related Concept Videos

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 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...
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 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 8, 2026

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters
10:52

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters

Published on: May 29, 2026

Promoting RNA helical stacking via A-minor junctions.

Cody Geary1, Arkadiusz Chworos, Luc Jaeger

  • 1Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106-9510, USA.

Nucleic Acids Research
|September 30, 2010
PubMed
Summary
This summary is machine-generated.

RNA A-minor junctions form stable 3D structures through topological rules. Two types exist, differing in loop interactions, aiding RNA design and structure prediction.

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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
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Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Published on: September 21, 2017

Related Experiment Videos

Last Updated: Jun 8, 2026

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters
10:52

Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters

Published on: May 29, 2026

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
09:04

Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids

Published on: September 21, 2017

Area of Science:

  • Structural biology
  • Molecular biology
  • Biochemistry

Background:

  • RNA molecules fold into complex 3D architectures using common structural motifs.
  • The A-minor junction is a critical RNA motif that governs coaxial helix stacking.

Purpose of the Study:

  • To compare natural and novel A-minor junctions using a self-assembling system.
  • To elucidate the topological rules governing A-minor junction interactions.
  • To classify A-minor junctions based on their self-assembling behavior and structural features.

Main Methods:

  • Utilized a sensitive self-assembling supramolecular system as an assay.
  • Employed native polyacrylamide gel electrophoresis (native PAGE) for analysis.
  • Applied atomic force microscopy (AFM) for high-resolution imaging.

Main Results:

  • Identified two distinct types of A-minor junctions based on self-assembly behavior.
  • Demonstrated that A-minor junctions follow a topological rule accommodating diverse interactions.
  • Showcased how different RNA structural motifs contribute to equivalent helical stacks.

Conclusions:

  • A-minor junctions can be classified by tertiary structural features, not just secondary ones.
  • The A-minor junction rule is valuable for predicting RNA tertiary structures.
  • This rule facilitates the rational design of RNA components for nanobiotechnology and synthetic biology.