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Structural Protein Function

Structural Protein Function

Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...

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Related Experiment Video

Updated: Jun 16, 2026

Imaging Denatured Collagen Strands In vivo and Ex vivo via Photo-triggered Hybridization of Caged Collagen Mimetic Peptides

Imaging Denatured Collagen Strands In vivo and Ex vivo via Photo-triggered Hybridization of Caged Collagen Mimetic Peptides

Published on: January 31, 2014

Programmable Steric Control of Collagen Peptide-to-Fiber Assembly.

Pengfei Jin¹, David M Chenoweth¹

¹Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.

Journal of the American Chemical Society

|April 16, 2026

Summary

This summary is machine-generated.

Researchers designed self-assembling collagen peptides that form specific triple-helical filaments. These peptide-based biomaterials create hydrogels with enhanced stiffness and shear-thinning properties, mimicking natural collagen.

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Last Updated: Jun 16, 2026

Imaging Denatured Collagen Strands In vivo and Ex vivo via Photo-triggered Hybridization of Caged Collagen Mimetic Peptides

Imaging Denatured Collagen Strands In vivo and Ex vivo via Photo-triggered Hybridization of Caged Collagen Mimetic Peptides

Published on: January 31, 2014

Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo

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Published on: May 9, 2016

Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment

Microengineering 3D Collagen Hydrogels with Long-Range Fiber Alignment

Published on: September 7, 2022

Area of Science:

Biomaterials Science
Supramolecular Chemistry
Biochemistry

Background:

Peptide-based collagen-mimetic materials are promising fibrillar collagen surrogates.
Challenges exist in assembling collagen peptides into well-defined filaments due to nonspecific interactions.

Purpose of the Study:

To develop an efficient strategy for creating collagen-mimicking filaments with high specificity.
To engineer self-assembling peptides that form triple-helical structures.

Main Methods:

Designed peptides with a single-residue side-chain modification for controlled intermolecular steric interactions ('bump-gap' design).
Investigated self-assembly into triple-helical filaments and their structural characteristics.

Main Results:

Achieved highly specific self-assembly into interlocked, endlessly growing triple-helical filaments.
Peptide filaments exhibited micrometer lengths and formed networked hydrogel structures.
The resulting hydrogels showed superior stiffness and shear-thinning properties compared to natural collagen.

Conclusions:

A novel 'bump-gap' design enables precise control over peptide self-assembly into collagen-mimicking filaments.
These engineered filaments can form advanced hydrogels with tunable mechanical properties.
The developed strategy offers a versatile platform for biomaterial design based on collagen.