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Related Experiment Videos

Translation termination and yeast prions.

L L Kisselev1

  • 1Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 117984, Russia. kissel@imb.ac.ru.

Biochemistry. Biokhimiia
|January 29, 2000
PubMed
Summary

Translation termination releases completed proteins from ribosomes, a crucial step in gene expression. This process, excluding protein folding, is vital for the DNA-to-phenotype transition.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Protein biosynthesis is the final stage of genetic information transfer.
  • Translation termination is the release of the polypeptide chain from the ribosome.
  • This process is key to the genotype-to-phenotype transition via the DNA-RNA-protein pathway.

Purpose of the Study:

  • To explore the multifaceted problem of translation termination.
  • To exclude protein folding from the scope of discussion.
  • To examine yeast termination factors with prion-like properties.

Main Methods:

  • Review of existing literature on translation termination.
  • Analysis of the molecular mechanisms involved in polypeptide release.
  • Consideration of specific termination factors, including those in yeast.

Main Results:

  • Translation termination involves hydrolytic cleavage of peptidyl-tRNA, releasing a completed polypeptide.
  • The ribosome dissociates into its components after protein synthesis.
  • Yeast termination factors exhibit prion-like characteristics.

Conclusions:

  • Translation termination is a critical, final step in protein biosynthesis, distinct from folding.
  • Understanding termination is essential for comprehending gene expression.
  • Yeast termination factors present unique properties relevant to molecular biology.

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