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Related Experiment Videos

Mutation processes at the protein level: is Lamarck back?

Y O Chernoff1

  • 1School of Biology and Institute for Bioengineering and Bioscience, Georgia Institute of Technology, M/C 0363, 315 Ferst Drive, Atlanta, GA 30332-0363, USA. yc22@prism.gatech.edu

Mutation Research
|February 27, 2001
PubMed
Summary
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Inherited variation extends beyond DNA. The prion model explains how protein shape changes can be inherited, impacting genetics and potentially Lamarckian evolution.

Area of Science:

  • Molecular Biology
  • Genetics
  • Evolutionary Biology

Background:

  • Inherited variation is not limited to genomic sequence changes.
  • The prion model explains template-like reproduction of alternative protein conformations.
  • This model is now extended to protein-based genetic elements in yeast and fungi.

Purpose of the Study:

  • To explore the role of protein-based genetic elements and their replication machinery.
  • To investigate the function of chaperones like Hsp100 and Hsp70 in prion propagation.
  • To examine the evolutionary conservation and potential of prion-like mechanisms.

Main Methods:

  • Analysis of prion replication machinery in yeast.
  • Investigating the effects of chaperone alterations on protein-based genetic elements.

Related Experiment Videos

  • Examining protein aggregation and prion-like switches across different proteins.

    • Main Results:

    • Stress-related chaperones (Hsp100, Hsp70) are crucial for prion replication.
    • Alterations in chaperones can lead to "mutator" or "antimutator" effects on protein-based elements.
    • Proteins of diverse origins can form amyloid-like aggregates, suggesting potential prion-like behavior.

    Conclusions:

    • Protein-based inheritance mechanisms exist and are conserved evolutionarily.
    • Prion-like phenomena may offer a molecular basis for the inheritance of acquired traits.
    • Genome sequence alone may not fully define an organism's genetic makeup, challenging traditional views of heredity.