Diverse Proteomimetic Frameworks via Rational Design of π-Stacking Peptide Tectons

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Biomaterials Engineering

Background:

• Peptide-based frameworks integrate protein architecture into solid-state materials.
• Rational engineering of peptide framework properties like pore size and shape remains challenging.
• Predicting complex intermolecular interactions in peptide assemblies is difficult.

Purpose of the Study:

• To develop a simple strategy for predictably tuning pore characteristics in peptide frameworks.
• To investigate the role of π-π interactions in peptide assembly for materials design.
• To establish guidelines for the rational design of advanced porous materials using peptide tectons.

Main Methods:

• Utilizing peptide elongation to modify the geometry of π-stacking groups.
• Synthesizing and characterizing peptide-polyaromatic conjugates.
• Analyzing framework structures using crystallographic data.
• Correlating tecton geometry and sequence with framework properties.

Main Results:

• Peptide elongation predictably tunes the angle between π-stacking groups, controlling pore size and shape diversity.
• Even single amino acid insertions can cause significant changes in pore characteristics, including mesoporosity.
• Tecton geometry and polarity are identified as straightforward predictors of framework structure.
• Sequence identity indirectly modulates π-π interactions and framework assembly.

Conclusions:

• Peptide elongation offers a simple and effective mechanism for rational design of porous peptide materials.
• The geometry and polarity of peptide tectons are key factors in predicting framework structure.
• This work accelerates the development of advanced porous materials with tunable, protein-like capabilities.