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Related Concept Videos

Ribosomes01:27

Ribosomes

9.4K
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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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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Ribosome Profiling02:24

Ribosome Profiling

3.9K
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.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
3.9K
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

14.0K
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.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
14.0K
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

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3.8K
Improving Translational Accuracy02:07

Improving Translational Accuracy

12.5K
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
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Updated: Nov 18, 2025

RIBO-seq in Bacteria: a Sample Collection and Library Preparation Protocol for NGS Sequencing
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RIBO-seq in Bacteria: a Sample Collection and Library Preparation Protocol for NGS Sequencing

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Ribosome heterogeneity and specialization in development.

Karl Norris1,2, Tayah Hopes1,2, Julie Louise Aspden1,2

  • 1Faculty of Biological Sciences, School of Molecular and Cellular Biology, University of Leeds, Leeds, UK.

Wiley Interdisciplinary Reviews. RNA
|February 10, 2021
PubMed
Summary

Ribosomes, once thought uniform, are now known to be heterogeneous and may specialize in translating specific messenger RNAs (mRNAs). This ribosome heterogeneity is crucial for development, but its precise functions remain under investigation.

Keywords:
Drosophila melanogasterRibosomedevelopmentmRNA translationribosomal protein

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Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Genetics

Background:

  • Protein synthesis regulation is key to gene expression, particularly during development.
  • Ribosomes are now understood to be heterogeneous, not uniform, and actively participate in translational regulation.
  • Specialized ribosomes, with unique components, are proposed to translate specific messenger RNAs (mRNAs).

Purpose of the Study:

  • To explore the biological relevance and functional importance of ribosome heterogeneity in development.
  • To investigate the evidence for specialized ribosome functions in various developmental processes.
  • To clarify the relationship between tissue-specific expression, ribosome specialization, and developmental outcomes.

Main Methods:

  • Analysis of recent studies in diverse developmental model organisms.
  • Examination of tissue-specific expression patterns of ribosomal components.
  • Phenotypic analysis of mutations in ribosomal genes.

Main Results:

  • Evidence suggests ribosome heterogeneity and potential specialization are widespread in key developmental processes (embryogenesis, neurogenesis, etc.).
  • Proposed examples of ribosome specialization exist, but direct links to specific mRNA translation and function are often elusive.
  • Heterogeneous ribosome populations may arise from tissue-specific expression, with observed phenotypes potentially due to extra-ribosomal effects or reduced ribosome levels.

Conclusions:

  • The functional significance of ribosome heterogeneity in development and disease requires further investigation.
  • Understanding ribosome heterogeneity is critical for comprehending diseases linked to ribosomal composition defects, such as ribosomopathies.
  • Future research must rigorously link ribosome heterogeneity to specific mRNA translation mechanisms and their developmental roles.