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Self-assembly pathways and polymorphism in peptide-based nanostructures.

Nikola A Dudukovic1, Benjamin C Hudson, Anant K Paravastu

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Summary
This summary is machine-generated.

Dipeptide derivatives like Fmoc-FF form self-assembled nanofiber networks, creating tunable molecular gels. This study explores their phase behavior in various solvents, revealing new gelation pathways and insights into peptide self-assembly.

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Area of Science:

  • Supramolecular chemistry
  • Materials science
  • Biophysics

Background:

  • Dipeptide derivatives self-assemble into nanofiber networks, forming molecular gels with tunable properties.
  • This self-assembly resembles pathological amyloid fibril formation.
  • The thermodynamic and kinetic mechanisms of Fmoc-FF gelation are not fully understood.

Purpose of the Study:

  • To investigate the phase behavior of Fmoc-FF in different solvents.
  • To understand the thermodynamic and kinetic phenomena governing Fmoc-FF gel formation.
  • To explore Fmoc-FF as a model system for peptide self-assembly.

Main Methods:

  • Studied Fmoc-FF gelation in various solvents, including apolar systems.
  • Analyzed the formation of anisotropic crystals (nanofibers) as metastable states.
  • Investigated the influence of solvent composition on molecular conformation during assembly.

Main Results:

  • Fmoc-FF gelation can be induced in apolar solvents, expanding known gelation pathways.
  • Anisotropic nanofibers can form as initial metastable states, followed by aggregate formation.
  • Molecular conformation is sensitive to solvent composition, impacting self-assembly.

Conclusions:

  • Fmoc-FF exhibits versatile gelation behavior across different solvent systems.
  • The study provides insights into the thermodynamic and kinetic control of peptide self-assembly.
  • Fmoc-FF serves as a valuable model for understanding complex self-assembly processes.