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Isolation of Ribosome Bound Nascent Polypeptides in vitro to Identify Translational Pause Sites Along mRNA
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Redundancy of the genetic code enables translational pausing.

David J D'Onofrio1, David L Abel2

  • 1Control Systems Modeling and Simulation, General Dynamics Sterling Heights, MI, USA ; Department of Humanities and Science, Math Department, College of Humanities and Science, University of Phoenix Detroit, MI, USA.

Frontiers in Genetics
|June 7, 2014
PubMed
Summary

Codon redundancy in mRNA programming enables Translational Pausing (TP), influencing protein folding. This "degenerate" code allows simultaneous amino acid and TP assignments, revealing a rule-based system within the genetic code.

Keywords:
Shine Dalgarno sequencesalgorithmco-translational foldingdegeneracymulti-dimensional coderegulationribosometranslational pausing

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Area of Science:

  • Molecular Biology
  • Genetics
  • Bioinformatics

Background:

  • The genetic code's codon redundancy, often termed "degeneracy," has been primarily associated with amino acid assignment.
  • This redundancy may harbor additional, uncharacterized biological functions beyond simple amino acid encoding.

Purpose of the Study:

  • To investigate the role of codon redundancy in programming Translational Pausing (TP).
  • To demonstrate that codon redundancy encodes a rule-based TP schema.
  • To elucidate the algorithmic basis of this multi-dimensional coding system.

Main Methods:

  • Analysis of mRNA sequences and codon usage patterns.
  • Computational modeling of translational dynamics.
  • Algorithmic assessment of the codon table for dual-coding properties.

Main Results:

  • Codon redundancy directly prescribes Translational Pausing (TP) in protein synthesis.
  • A novel layer of Ontological Prescriptive Information (PIo) is identified, regulating translation speed.
  • The TP schema functions as a bona fide, rule-based code embedded within codon redundancy.
  • Algorithmic processes are central to the realization of this multi-dimensional code.

Conclusions:

  • Codon redundancy is not superfluous but a sophisticated programming mechanism.
  • The genetic code supports simultaneous, non-interfering assignments of amino acids and TP.
  • This discovery redefines our understanding of genetic information processing and protein synthesis regulation.