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Updated: Jun 7, 2025
Non-chromatographic Purification of Recombinant Elastin-like Polypeptides and their Fusions with Peptides and Proteins from Escherichia coli
Published on: June 9, 2014
Cholesterol Conjugated Elastin-like Recombinamers: Molecular Dynamics Simulations, Conformational Changes, and
Rui R Costa1,2,3, Vicente Domínguez-Arca4,5, Brenda Velasco3
13B's Research Group, I3Bs─Research Institute on Biomaterials, Biodegradables, and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-694 Barco, Guimarães, Portugal.
Cholesterol functionalization of elastin-like recombinamers (ELRs) improves their self-assembly and interaction with lipid bilayers. This creates novel biomaterials for enhanced nanoparticle drug delivery systems.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Current elastin-like recombinamer (ELR) design models lack predictive power for nonprotein fusions.
- Understanding how fused materials affect ELR conformation and temperature-responsiveness is crucial.
Purpose of the Study:
- To investigate the functionalization of ELRs with cholesterol (cholesteryl thiolated amine - CTA).
- To explore the impact of CTA on ELR properties and self-assembly for drug delivery applications.
Main Methods:
- Computational molecular dynamics simulations (GROMACS) and experimental validation.
- Biosynthesis and characterization of ELR-CTA using fluorescence, circular dichroism, DLS, and DSC.
- Cell-based assays with cancer and immune cell lines.
Main Results:
- CTA promotes β-sheet formation and enhances hydrophobicity and stability of ELRs.
- ELR-CTA forms monodisperse nanoaggregates and interacts with lipid bilayers.
- Modified ELR nanoparticles show size- and composition-dependent cellular internalization.
Conclusions:
- Cholesterol functionalization offers a new strategy for designing ELR-based biomaterials with predictable self-assembly.
- ELR-CTA nanoparticles show potential for localized and systemic drug delivery.
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