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Updated: Feb 7, 2026

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Conformational Conversion during Controlled Oligomerization into Nonamylogenic Protein Nanoparticles.

Julieta M Sánchez^1,2, Laura Sánchez-García^3,4, Mireia Pesarrodona^1,3,4

¹Institut de Biotecnologia i de Biomedicina , Universitat Autònoma de Barcelona , Bellaterra 08193 Barcelona , Spain.

Biomacromolecules

|July 28, 2018

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Researchers explored protein nanoparticles for drug delivery, finding a novel beta structure that enhances stability. This discovery aids in developing safer, non-amyloid protein-based nanomedicines.

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Area of Science:

Materials Science
Nanomedicine
Biotechnology

Background:

Protein materials offer biocompatibility and biodegradability for advanced applications.
Controlled polypeptide oligomerization is key for supramolecular assembly.
Non-amyloidogenic protein organizations are needed due to amyloid toxicity concerns.

Purpose of the Study:

To investigate the structural basis of non-amyloidogenic protein oligomerization.
To characterize the conformational changes during nanoparticle formation.
To explore the potential of His-tagged cationic stretches for tumor-targeted drug delivery.

Main Methods:

Spectrofluorimetry and spectropolarimetry were used to analyze protein conformational changes.
Oligomerization of His-tagged cationic stretches was induced.
Formation of regular nanoparticles (approx. 11 nm) was observed.

Main Results:

A novel protein conformation was identified during nanoparticle formation.
The resulting protein assemblies exhibit increased compactness and beta-structure enrichment.
Enhanced structural stability was observed in the formed nanoparticles.

Conclusions:

Conformational profiling provides insights into non-amylogenic oligomerization.
Tailoring protein structure can optimize nanoparticle formation for nanomedicine.
Cationic and histidine-rich protein stretches are promising for advanced nanomedical strategies.