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Related Concept Videos

Improving Translational Accuracy02:07

Improving Translational Accuracy

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...
Improving Translational Accuracy02:07

Improving Translational Accuracy

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...
Leaky Scanning02:28

Leaky Scanning

During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
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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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Ribosomal RNA Synthesis02:53

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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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Translational Regulation

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Genome-wide Quantification of Translation in Budding Yeast by Ribosome Profiling
12:57

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Published on: December 21, 2017

Speeding with control: codon usage, tRNAs, and ribosomes.

Eva Maria Novoa1, Lluís Ribas de Pouplana

  • 1Institute for Research in Biomedicine (IRB), c/Baldiri Reixac 15-21 08028, Barcelona, Catalonia, Spain.

Trends in Genetics : TIG
|August 28, 2012
PubMed
Summary
This summary is machine-generated.

Codon usage bias and transfer RNA (tRNA) abundance regulate gene expression, protein folding, and translation speed. Understanding these factors and their impact on gene synthesis is crucial for biological research.

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Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation
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Optical Tweezers to Study RNA-Protein Interactions in Translation Regulation

Published on: February 12, 2022

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Codon usage bias and tRNA abundance are key to gene expression.
  • The forces driving codon bias and the roles of tRNA dynamics are not fully understood.
  • The function of tRNA base modifications in gene regulation is also unclear.

Purpose of the Study:

  • To explore the significance of codon usage and tRNA abundance in gene synthesis.
  • To discuss the rules governing codon usage and tRNA abundances.
  • To highlight the role of codon-anticodon interactions in translation regulation.

Main Methods:

  • Review of existing literature on codon usage bias.
  • Analysis of tRNA abundance and isoacceptor populations.
  • Examination of post-transcriptional base modifications in tRNA.

Main Results:

  • Codon usage and tRNA abundance influence gene expression and protein synthesis.
  • These parameters regulate ribosomal translation speed and protein folding efficiency.
  • Non-random codon distributions and tRNA modifications contribute to translation regulation.

Conclusions:

  • Deciphering codon usage and tRNA dynamics offers insights into gene expression control.
  • Codon-anticodon interactions are vital for regulating translation.
  • Base modifications on tRNA play a significant role in fine-tuning gene expression.