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Translation01:31

Translation

157.4K
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
157.4K
Translation01:31

Translation

18.2K
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are...
18.2K
Initiation of Translation02:33

Initiation of Translation

39.3K
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
39.3K
Termination of Translation01:44

Termination of Translation

28.0K
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
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Termination of Translation01:44

Termination of Translation

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6.8K
Improving Translational Accuracy02:07

Improving Translational Accuracy

15.1K
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: Feb 16, 2026

Use of the TetON System to Study Molecular Mechanisms of Zebrafish Regeneration
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A molecular mechanics study on GA codon box translation.

Martina Devi1, Esther Chingbiaknem1, R H Duncan Lyngdoh1

  • 1Department of Chemistry, North-Eastern Hill University, Shillong 793022, India.

Journal of Theoretical Biology
|January 7, 2018
PubMed
Summary

This study used molecular mechanics to analyze codon-anticodon interactions for aspartic acid and glutamic acid. Results support Crick's wobble hypothesis, differentiating cognate from non-cognate pairings based on structure and stability.

Keywords:
AMBER molecular mechanicsCodon-anticodon duplexGA codon box translationWobble base pair configuration

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • The genetic code exhibits degeneracy, where multiple codons can specify the same amino acid.
  • Understanding codon-anticodon interactions is crucial for deciphering the mechanisms of protein synthesis.
  • Crick's wobble hypothesis describes the non-standard base pairing at the third position of the codon.

Purpose of the Study:

  • To investigate the structural and energetic basis of codon-anticodon recognition for aspartic acid and glutamic acid.
  • To explore the role of wobble base pairing in differentiating cognate from non-cognate interactions.
  • To computationally validate experimental observations regarding anticodon usage.

Main Methods:

  • Utilized the AMBER suite for molecular mechanics simulations.
  • Modeled H-bonding interactions between GA codon box codons and cognate/non-cognate anticodons.
  • Analyzed 23 distinct codon-anticodon duplexes, including those with alanine anticodons.

Main Results:

  • Identified 8 cognate and 11 non-cognate codon-anticodon duplexes for aspartic acid and glutamic acid.
  • Observed diverse base-pairing patterns at the wobble position.
  • Differentiated cognate from non-cognate duplexes primarily by structural and stability features.

Conclusions:

  • The findings align with Crick's wobble hypothesis.
  • Computational results corroborate experimental data on aspartic acid and glutamic acid anticodon reading properties.
  • Structural and stability analyses provide insights into the fidelity of translation for degenerate codons.