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Related Concept Videos

Amyloid Fibrils03:03

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Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
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A prebiotic template-directed peptide synthesis based on amyloids.

Saroj K Rout1, Michael P Friedmann1, Roland Riek2

  • 1Laboratory of Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland.

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|January 18, 2018
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Summary

Amyloid peptides can selectively replicate amino acids, mimicking early life conditions. This templating mechanism is robust across various conditions, offering a model for prebiotic peptide synthesis.

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Area of Science:

  • Biochemistry
  • Astrobiology
  • Origin of Life Studies

Background:

  • The prebiotic replication of information-coding molecules is crucial for understanding the origin of life.
  • Peptide self-assembly into amyloid structures is a potential pathway for early molecular organization.

Purpose of the Study:

  • To investigate the ability of amyloid peptides to direct the selective replication of amino acids.
  • To explore the potential of amyloid structures as models for prebiotic peptide synthesis.

Main Methods:

  • Utilized short peptide amyloids as templates for amino acid condensation.
  • Investigated sequence-selective, regioselective, and stereoselective addition of activated amino acids.
  • Tested the generality of the templating mechanism with different amyloid compositions and conditions.

Main Results:

  • Amyloid templates directed highly selective peptide synthesis (sequence, regio-, stereoselectivity).
  • Specific amyloid structures yielded isotactic products, unlike non-templated reactions.
  • The templating mechanism demonstrated stability across a wide range of pH, salt concentrations, and temperatures.

Conclusions:

  • Amyloid peptides can serve as effective templates for prebiotic peptide replication.
  • The observed selectivity and stability support amyloids as plausible models for early life chemical systems.
  • This research provides insights into the potential mechanisms for the origin of molecular information and replication.