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Related Concept Videos

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...
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...
X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays areĀ  scattered by the electron clouds around the sample atoms. TheĀ  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
Protein Folding01:22

Protein Folding

Overview
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 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.

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Related Experiment Video

Updated: May 28, 2026

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

Published on: November 1, 2024

How random are intrinsically disordered proteins? A small angle scattering perspective.

Veronique Receveur-Brechot1, Dominique Durand

  • 1IMR-CNRS - UPR3243, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France. veronique.brechot@ifr88.cnrs-mrs.fr

Current Protein & Peptide Science
|November 3, 2011
PubMed
Summary
This summary is machine-generated.

Intrinsically disordered proteins (IDPs) play key roles in the cell cycle. Small-angle X-ray scattering (SAXS) and computational methods are vital for understanding IDP structure and function.

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Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering
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Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins
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Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins

Published on: September 23, 2021

Related Experiment Videos

Last Updated: May 28, 2026

NMR 15N Relaxation Experiments for the Investigation of Picosecond to Nanoseconds Structural Dynamics of Proteins
09:25

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

Published on: November 1, 2024

Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering
07:19

Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering

Published on: November 5, 2018

Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins
07:24

Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins

Published on: September 23, 2021

Area of Science:

  • Structural Biology
  • Biophysics
  • Computational Biology

Background:

  • Intrinsically disordered proteins (IDPs) are crucial for cell cycle regulation.
  • Determining the structure and function of IDPs is challenging.
  • Small-angle X-ray scattering (SAXS) is a powerful technique for studying IDPs.

Purpose of the Study:

  • To review the application of SAXS and polymer physics in understanding IDP flexibility.
  • To discuss strategies for modeling IDPs in solution and in complexes.
  • To highlight integrated computational approaches for IDP structural analysis.

Main Methods:

  • Small-angle X-ray scattering (SAXS) for IDP structural characterization.
  • Polymer physics theories to evaluate protein flexibility.
  • Computational modeling to generate ensembles of IDP conformers.
  • Integration of SAXS with high-resolution techniques (X-ray crystallography, NMR).

Main Results:

  • SAXS effectively addresses fundamental questions about IDP activities.
  • Computational advances enable detailed analysis of scattering data for flexible systems.
  • Integrated approaches yield reliable models and structural insights for IDPs.
  • Neutron scattering shows promise for studying complex conformational changes.

Conclusions:

  • SAXS, combined with computational and high-resolution methods, provides crucial structural insights into IDPs.
  • Advanced modeling techniques are essential for capturing the dynamic nature of IDPs.
  • Future studies using neutron scattering will further elucidate macromolecular conformational changes.