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Related Concept Videos

Protein Organization01:24

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence.
Protein Folding01:25

Protein Folding

Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...

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Related Experiment Video

Updated: Jul 10, 2026

Analyzing Large Protein Complexes by Structural Mass Spectrometry
15:35

Analyzing Large Protein Complexes by Structural Mass Spectrometry

Published on: June 20, 2010

Nanomanipulation and characterization of structural proteins.

B E Layton1, R Gupta, N L Jackson

  • 1Dept. of Mech. Eng. & Mech., Drexel Univ., Philadelphia, PA, USA.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 3, 2007
PubMed
Summary

Researchers developed a method to test single collagen fibrils mechanically and image them with atomic force microscopy. This technique enables precise measurement of fibril strength and modulus, with potential applications in regenerative medicine.

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Last Updated: Jul 10, 2026

Analyzing Large Protein Complexes by Structural Mass Spectrometry
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Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering
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Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering

Published on: November 5, 2018

Area of Science:

  • Biomaterials Science
  • Mechanical Engineering
  • Nanotechnology

Background:

  • Understanding the mechanical properties of individual collagen fibrils is crucial for comprehending tissue biomechanics.
  • Existing methods may not provide sufficient resolution or simultaneous mechanical and imaging capabilities for single fibrils.

Purpose of the Study:

  • To present a novel methodology for simultaneous mechanical testing and atomic force microscopy (AFM) imaging of single collagen fibrils.
  • To enable the determination of single-fibril modulus and strength across diverse experimental setups.
  • To explore potential applications in characterizing protein deformation and in nanoscale robotic surgery.

Main Methods:

  • Development of a combined mechanical testing and AFM imaging setup.
  • Application to single collagen fibrils under controlled loading conditions.
  • Utilized algorithms for nanoscale knot-tying in single fibrils.

Main Results:

  • Successful simultaneous mechanical testing and AFM imaging of single collagen fibrils.
  • Demonstrated capability to determine modulus and strength of individual fibrils.
  • Characterized deformation and failure modes of structural proteins.

Conclusions:

  • The presented methodology offers a powerful tool for characterizing the mechanical behavior of single collagen fibrils.
  • This technique has significant potential for applications in materials science, regenerative medicine, and nanoscale surgical repair.
  • Algorithms for nanoscale manipulation open new avenues for structural protein engineering.