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Related Concept Videos

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 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 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 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 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...
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...

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Related Experiment Video

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Nanomanipulation of Single RNA Molecules by Optical Tweezers
06:59

Nanomanipulation of Single RNA Molecules by Optical Tweezers

Published on: August 20, 2014

Structural studies on transfer RNA: the molecular conformation in solution.

P G Connors1, M Labanauskas, W W Beeman

  • 1Laboratory of Biophysics, University of Wisconsin, Madison 53706, USA.

Science (New York, N.Y.)
|December 19, 1969
PubMed
Summary

Small-angle X-ray scattering reveals transfer RNA (tRNA) molecules are uniformly sized and shaped. A structural model with a helical core and folded regions accurately predicts these findings.

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Structural Biology

Background:

  • Transfer RNA (tRNA) is crucial for protein synthesis, translating genetic code.
  • Understanding tRNA's three-dimensional structure in solution is key to elucidating its function.
  • Previous structural studies often relied on crystallization, which may not reflect solution states.

Purpose of the Study:

  • To determine the solution structure and shape of transfer RNA (tRNA) molecules.
  • To compare the structures of different tRNA species in a biologically relevant state.
  • To develop and validate a structural model for tRNA based on experimental data.

Main Methods:

  • Small-angle X-ray scattering (SAXS) was employed to analyze tRNA in solution.
  • Scattering curves were collected for four distinct species of transfer RNA.
  • Computational modeling was used to interpret the SAXS data and propose a structural model.

Main Results:

  • SAXS data indicated that the four studied tRNA species exhibit remarkably similar overall size and shape.
  • The experimental scattering curves were well-reproduced by a structural model.
  • The proposed model features a compact structure with a prominent helical core and tightly folded regions.

Conclusions:

  • Transfer RNA molecules possess a conserved overall architecture in solution, irrespective of specific sequence.
  • The identified structural model provides a plausible representation of tRNA's solution conformation.
  • This study enhances our understanding of tRNA structure-function relationships in the context of protein synthesis.