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Protein Complex Assembly

Protein Complex Assembly

Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...

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Related Experiment Video

Updated: Dec 27, 2025

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy

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Published on: February 5, 2020

Polyphenol-Mediated Assembly of Proteins for Engineering Functional Materials.

Yiyuan Han¹, Zhixing Lin¹, Jiajing Zhou¹

¹ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia.

Angewandte Chemie (International Ed. in English)

|March 3, 2020

Summary

Researchers developed a versatile method to create functional protein nanomaterials using proteins and polyphenols like tannic acid. This approach stabilizes proteins, preserving their function for applications in catalysis and imaging.

Keywords:

biomaterials particle surface engineering polyphenols protein assembly proteins

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Area of Science:

Materials Science
Biotechnology
Nanotechnology

Background:

Proteins offer diverse functionalities, making them attractive for developing advanced materials.
Current methods for creating protein-based nanomaterials face challenges due to protein instability and complex assembly requirements.

Purpose of the Study:

To introduce a simple and versatile strategy for fabricating functional protein assemblies.
To explore the use of polyphenols, such as tannic acid, for stabilizing protein nanomaterials.

Main Methods:

Developed an interfacial assembly technique combining proteins and polyphenols (tannic acid) on diverse substrates.
Investigated the key interactions (hydrogen-bonding, hydrophobic, ionic) governing protein-polyphenol assembly.
Assessed the structural integrity and functional retention of proteins within the assembled nanomaterials.

Main Results:

Successfully fabricated functional protein assemblies on organic, inorganic, and biological substrates.
Elucidated that multiple noncovalent interactions stabilize proteins with polyphenols, enabling engineered responsiveness.
Demonstrated that proteins maintain their native structure and biological activity within the assemblies.

Conclusions:

The protein-polyphenol interfacial assembly offers a general and robust method for creating functional nanomaterials.
This strategy overcomes challenges associated with protein denaturation and enables the development of protein-based functional materials.
The resulting protein assemblies are suitable for diverse applications, including catalysis, fluorescence imaging, and cell targeting.