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Related Concept Videos

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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...
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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.
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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.
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In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to the cytoplasm for protein synthesis. Before transport, a pre-mRNA undergoes several steps of post-transcriptional modifications including splicing, 5' capping, and the addition of a poly-adenine tail. Various proteins bind to the pre-mRNA during these modifications. The mRNA transport takes place with the help of multiple proteins playing...
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Related Experiment Video

Updated: Nov 15, 2025

Polysome Fractionation and Analysis of Mammalian Translatomes on a Genome-wide Scale
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Variability in mRNA translation: a random matrix theory approach.

Michael Margaliot1, Wasim Huleihel1, Tamir Tuller2

  • 1Department of Electrical Engineering-Systems, Faculty of Engineering, Tel Aviv University, 69978, Tel Aviv, Israel.

Scientific Reports
|March 6, 2021
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Summary
This summary is machine-generated.

Cellular protein production rates are stabilized by a universality principle, despite noisy molecular processes. This finding explains how cells maintain consistent protein output despite inherent biological variability.

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Area of Science:

  • Molecular biology
  • Biophysics
  • Theoretical biology

Background:

  • mRNA translation involves initiation, elongation, and termination rates, influenced by local factors.
  • Cellular processes exhibit significant stochasticity and noisy measurements, posing challenges for understanding protein production.

Purpose of the Study:

  • To develop a theoretical framework for analyzing protein production under stochastic conditions.
  • To investigate how variability in translation rates affects cellular protein output.

Main Methods:

  • Modeling translation rates as independent and identically distributed random variables.
  • Applying random matrix theory to analyze steady-state protein production rates.

Main Results:

  • A principle of universality governs average protein production rates.
  • The average rate depends solely on the distribution of possible rate values.
  • Protein production is stabilized despite underlying stochasticity.

Conclusions:

  • Universality provides a mechanism for stabilizing protein production in cells.
  • This framework explains how cells achieve consistent protein output despite inherent variability.