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Related Concept Videos

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...
Protein Folding01:22

Protein Folding

Overview
Protein Folding01:22

Protein Folding

Overview
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
Protein Organization01:13

Protein Organization

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OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
08:34

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

Published on: February 5, 2020

Protein folding and unfolding under force.

Bharat Jagannathan1, Susan Marqusee

  • 1California Institute for Quantitative Biosciences, University of California, Berkeley, CA.

Biopolymers
|June 21, 2013
PubMed
Summary

Optical tweezers enable single-molecule studies of protein folding using minimal mechanical forces. This technique reveals how proteins respond to force, advancing our understanding of their complex folding processes.

Keywords:
force spectroscopyoptical tweezersprotein folding

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Last Updated: May 10, 2026

OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
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Microfluidic Mixers for Studying Protein Folding
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Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy
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Thermodynamics of Membrane Protein Folding Measured by Fluorescence Spectroscopy

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Biochemistry

Background:

  • Protein folding is crucial for biological function.
  • Understanding protein folding mechanisms is a key challenge in molecular biology.
  • Mechanical forces can act as denaturants, influencing protein structure.

Purpose of the Study:

  • To describe the principles and experimental details of force spectroscopy on proteins.
  • To highlight the application of optical tweezers in studying protein folding.
  • To showcase how mechanical force influences protein folding at the single-molecule level.

Main Methods:

  • Utilizing advanced optics and instrumentation for mechanical force application.
  • Employing single-molecule force spectroscopy.
  • Focusing on the optical tweezers technique for protein analysis.

Main Results:

  • Observation of the protein folding process at single-molecule resolution.
  • Demonstration of protein folding response to applied mechanical force.
  • Highlighting the utility of force spectroscopy in addressing protein folding questions.

Conclusions:

  • Force spectroscopy, particularly with optical tweezers, is a powerful tool for studying protein folding.
  • Mechanical forces play a significant role in protein structure and function.
  • This technique provides new insights into the fundamental processes of protein folding.