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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.
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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 Structure01:19

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

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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.
Different Types of RNA Have the Same Basic Structure
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The DNA Helix01:07

The DNA Helix

Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...
The DNA Helix01:16

The DNA Helix

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RNA structure prediction from evolutionary patterns of nucleotide composition.

S Smit1, R Knight, J Heringa

  • 1Centre for Integrative Bioinformatics VU (IBIVU), Vrije Universiteit, 1081 HV Amsterdam, The Netherlands. S.Smit@few.vu.nl

Nucleic Acids Research
|January 9, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed a new RNA structure prediction method called SPuNC (Structure Prediction using Nucleotide Composition). This method uses nucleotide composition to identify accurate RNA structures, improving prediction accuracy by over 20%.

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Area of Science:

  • Molecular Biology
  • Bioinformatics
  • Computational Biology

Background:

  • RNA molecules possess distinct nucleotide compositions within their structural elements.
  • These compositional patterns evolve gradually over time and exhibit shared features across RNA families.

Purpose of the Study:

  • To develop a novel RNA structure prediction method utilizing conserved nucleotide composition patterns.
  • To evaluate the efficacy of the developed method, SPuNC (Structure Prediction using Nucleotide Composition), in identifying accurate RNA structures.

Main Methods:

  • Developed SPuNC, a method that assesses candidate RNA structures based on their ability to replicate biological nucleotide composition patterns.
  • Tested SPuNC on diverse RNA families, comparing its performance against existing structure prediction tools.

Main Results:

  • SPuNC successfully identified the most accurate structures within ensembles, achieving over 20% improvement in average accuracy compared to all ensemble members.
  • Consensus structures derived from SPuNC's top-scoring predictions were more accurate than those from the full structural ensemble.
  • SPuNC outperformed existing methods on several RNA families, including novel riboswitches and ribozymes.

Conclusions:

  • Nucleotide composition is a reliable indicator of RNA structure quality.
  • The SPuNC method offers a valuable addition to the toolkit for RNA structure prediction.
  • This approach enhances the accuracy of predicting structures for various RNA types.