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[Protein Biosynthesis Proofreading Is Closely Associated with the Existence of Factor-Free Ribosomal Synthesis].

A V Finkelstein1,2,3, L P Gavrilova1

  • 1Institute of Protein Research, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290 Russia.

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|May 18, 2019
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Summary

Protein biosynthesis proofreading is linked to factor-free synthesis. A ribosome removes non-complementary aminoacyl-tRNA during factor-free polypeptide chain creation, acting as a proofreading mechanism.

Keywords:
GTPbiosynthesis of polypeptidescodon recognitionelongation factor Tufactor-free processfree energyparallel reactionsproofreadingribosome

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Protein biosynthesis is a fundamental biological process.
  • Ribosomal protein synthesis involves elongation factors.
  • The precise mechanisms of proofreading during translation are still under investigation.

Purpose of the Study:

  • To investigate the connection between proofreading during elongation factor-dependent protein synthesis and factor-free synthesis.
  • To elucidate the role of proofreading in factor-free polypeptide chain formation.

Main Methods:

  • Analysis of ribosomal protein biosynthesis pathways.
  • Investigation of factor-free synthesis mechanisms.
  • Study of aminoacyl-tRNA (Aa-tRNA) attachment and removal during translation.

Main Results:

  • A direct link was found between proofreading during normal ribosomal biosynthesis and factor-free synthesis.
  • In factor-free synthesis, proofreading is achieved by removing non-complementary aminoacyl-tRNA (Aa-tRNA).
  • This removal occurs through the same pathway as Aa-tRNA attachment.

Conclusions:

  • Factor-free polypeptide synthesis on a ribosome incorporates a proofreading mechanism.
  • This mechanism ensures accuracy by removing incorrectly bound aminoacyl-tRNA (Aa-tRNA).
  • Understanding this process deepens our knowledge of protein biosynthesis fidelity.