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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-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...

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Updated: Jun 20, 2026

Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates
06:48

Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates

Published on: January 5, 2024

Single-molecule protein interaction conformational dynamics.

H Peter Lu1

  • 1Department of Chemistry, Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, USA. hplu@bgsu.edu

Current Pharmaceutical Biotechnology
|August 20, 2009
PubMed
Summary
This summary is machine-generated.

Single-molecule spectroscopy reveals complex protein dynamics crucial for biomolecular functions. This technique overcomes limitations of traditional methods for studying protein interactions and transformations.

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Last Updated: Jun 20, 2026

Single-Molecule Measurement of Protein Interaction Dynamics Within Biomolecular Condensates
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Published on: January 5, 2024

NMR 15N Relaxation Experiments for the Investigation of Picosecond to Nanoseconds Structural Dynamics of Proteins
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09:51

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web

Published on: July 16, 2017

Area of Science:

  • Biophysics
  • Structural Biology
  • Biochemistry

Background:

  • Protein conformational dynamics are vital for biological functions.
  • Inhomogeneous protein dynamics are challenging to study using ensemble-averaged methods.
  • Complex interactions like protein-protein and protein-DNA involve multiple steps and conformations.

Purpose of the Study:

  • To highlight the importance of single-molecule spectroscopy for characterizing protein dynamics.
  • To explain the limitations of traditional methods in studying complex protein systems.
  • To emphasize the utility of single-molecule spectroscopy in understanding protein structure-function relationships.

Main Methods:

  • Single-molecule spectroscopy is presented as a key technique.
  • The method allows analysis under physiological conditions.
  • It provides molecular-level insights into protein dynamics.

Main Results:

  • Single-molecule spectroscopy offers a powerful approach to study protein dynamics.
  • It enables the characterization of spatially and temporally inhomogeneous dynamics.
  • This technique provides dynamic perspectives essential for understanding molecular mechanisms.

Conclusions:

  • Single-molecule spectroscopy is indispensable for elucidating complex protein conformational dynamics.
  • It bridges the gap between static structures and dynamic functions.
  • Understanding these dynamics is crucial for deciphering protein-protein and protein-DNA interactions.