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Related Concept Videos

Ribosomes01:27

Ribosomes

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Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
Ribosome Structure and Assembly
Ribosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome...
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Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
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Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
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Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
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Cluster Sampling Method

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Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
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Assessment of DNA Contamination in RNA Samples Based on Ribosomal DNA
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Exploring Wells-Dawson Clusters Associated With the Small Ribosomal Subunit.

Debbie C Crans1, Irma Sánchez-Lombardo1,2, Craig C McLauchlan3

  • 1Department Chemistry and the Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO, United States.

Frontiers in Chemistry
|July 24, 2019
PubMed
Summary

The Wells-Dawson cluster (P2W18) stabilized the ribosome, enabling detailed structural analysis. Researchers identified specific interactions, revealing W=O groups and peptide backbones as key binding sites for this polyoxometalate on the ribosome.

Keywords:
Dawson clusterH-bondingdouble Dawson clusterpolyoxotungstateprotein oxometalate interactionsribosome

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Area of Science:

  • Structural Biology
  • Biochemistry
  • Inorganic Chemistry

Background:

  • Polyoxometalates (POMs) are versatile inorganic clusters with potential applications in structural biology.
  • The Wells-Dawson cluster, a specific POM, has been utilized to facilitate ribosome structural determination.
  • Understanding POM-protein interactions is crucial for developing new biochemical tools.

Purpose of the Study:

  • To characterize the interaction between the Wells-Dawson cluster (P2W18) and the ribosome small subunit.
  • To identify the specific binding sites and interaction modes of the Wells-Dawson cluster on the ribosome.
  • To investigate the existence and geometric feasibility of a Double Wells-Dawson cluster structure on the ribosome.

Main Methods:

  • Crystallographic analysis of ribosome structures in complex with Wells-Dawson clusters.
  • Detailed characterization of POM-ribosome interfaces.
  • Geometric analysis of potential Double Wells-Dawson cluster arrangements.

Main Results:

  • The Wells-Dawson cluster (P2W18) significantly improved ribosome structural resolution.
  • Fourteen distinct Wells-Dawson clusters interact with the ribosome, with W=O groups and peptide backbones being primary interaction sites.
  • A Double Wells-Dawson cluster structure on the ribosome was found to be geometrically sound and consistent with known structures.

Conclusions:

  • The Wells-Dawson cluster is an effective stabilizer for ribosome structural studies.
  • Specific interactions involving W=O groups and the ribosome backbone define the binding of this polyoxometalate.
  • The presence of a genuine Double Wells-Dawson cluster on the ribosome is supported by structural and geometric evidence.