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Related Experiment Video

Updated: Feb 3, 2026

Non-chromatographic Purification of Recombinant Elastin-like Polypeptides and their Fusions with Peptides and Proteins from Escherichia coli

Non-chromatographic Purification of Recombinant Elastin-like Polypeptides and their Fusions with Peptides and Proteins from Escherichia coli

Published on: June 9, 2014

Injectable tissue integrating networks from recombinant polypeptides with tunable order.

Stefan Roberts¹, Tyler S Harmon^2,3, Jeffrey L Schaal¹

¹Department of Biomedical Engineering, Duke University, Durham, NC, USA.

Nature Materials

|October 17, 2018

Summary

Scientists designed novel protein biomaterials with tunable properties by controlling nanoscale order and disorder. These materials form stable, porous scaffolds in the body, showing promise for tissue integration and regeneration.

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Non-chromatographic Purification of Recombinant Elastin-like Polypeptides and their Fusions with Peptides and Proteins from Escherichia coli

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Area of Science:

Biomaterials Science
Protein Engineering
Nanotechnology

Background:

Emergent properties in natural biomaterials arise from nanoscale interactions.
Designing synthetic biomaterials with controlled hierarchical structures is challenging.

Purpose of the Study:

To investigate emergent hierarchical structures using partially ordered polypeptides.
To precisely encode nanoscale order-disorder interactions for tunable biomaterial properties.

Main Methods:

Recombinant sequence design of polypeptides combining ordered (polyalanine) and disordered (elastin-like) domains.
Thermal characterization of stimuli-responsiveness and hysteresis.
Coarse-grain simulations to understand phase separation and crosslinking mechanisms.
In vivo assessment of scaffold formation, tissue integration, and vascularization.

Main Results:

Developed thermally responsive polypeptides with tunable hysteresis.
Demonstrated reversible formation of porous, viscoelastic networks above threshold temperatures.
Simulations revealed hysteresis is driven by mesoscale phase separation.
Injected polypeptides formed stable, porous scaffolds that integrated rapidly with high vascularization and minimal inflammation in vivo.

Conclusions:

Sequence-level control of structural order and disorder is a key principle for designing functional protein-based biomaterials.
Partially ordered polypeptides offer a versatile platform for creating advanced biomaterials with tailored properties for tissue engineering.