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Related Concept Videos

Protein Organization01:24

Protein Organization

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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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Protein Complexes with Interchangeable Parts01:57

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Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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Protein and Protein Structure02:15

Protein and Protein Structure

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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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Structural Protein Function01:56

Structural Protein Function

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Related Experiment Video

Updated: Oct 23, 2025

Investigating Protein Sequence-structure-dynamics Relationships with Bio3D-web
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IMProv: A Resource for Cross-link-Driven Structure Modeling that Accommodates Protein Dynamics.

Daniel S Ziemianowicz1, Daniel Saltzberg2, Troy Pells1

  • 1Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada; Robson DNA Science Centre, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, Alberta, Canada.

Molecular & Cellular Proteomics : MCP
|August 21, 2021
PubMed
Summary
This summary is machine-generated.

IMProv integrates cross-linking mass spectrometry (XL-MS) and hydrogen-deuterium exchange mass spectrometry (HX-MS) data for protein structure modeling. This accessible pipeline enhances structural proteomics by improving model precision using dynamics-driven restraints.

Keywords:
Polycomb Repressive Complex 2crosslinkingcryo-electron microscopyhydrogen-deuterium exchangeintegrative modelingstructural mass spectrometry

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Area of Science:

  • Structural biology
  • Proteomics
  • Computational biology

Background:

  • Protein structural analysis is advancing with cross-linking mass spectrometry (XL-MS) and hydrogen-deuterium exchange mass spectrometry (HX-MS).
  • Existing tools for primary data analysis are effective, but accessible structure modeling pipelines for proteomics specialists are lacking.
  • Integrative structural biology necessitates combining diverse data types for robust model generation.

Purpose of the Study:

  • To introduce IMProv, an app within Mass Spec Studio designed for integrative structure modeling.
  • To enable the combination of XL-MS data with other structural information (e.g., cryo-EM, crystallography).
  • To provide an accessible, high-performance computing-based pipeline for proteomics specialists.

Main Methods:

  • IMProv integrates XL-MS data with other structural data, including cryo-EM densities and crystallographic structures.
  • It utilizes an easily deployable bundle of the open-source Integrative Modeling Platform (IMP) and its dependencies.
  • Functionality is included to adjust cross-link distance restraints based on dynamics characterized by HX-MS.

Main Results:

  • IMProv facilitates integrative structure modeling on high-performance computing platforms.
  • The app allows for dynamics-driven conditioning of restraint values, improving structure modeling precision.
  • Demonstrated improved precision with an integrative structure of the Polycomb Repressive Complex 2.

Conclusions:

  • IMProv provides an accessible and extensible platform for integrative structure modeling in proteomics.
  • The integration of dynamics-informed restraints enhances the accuracy of protein structure models.
  • The tool supports the aggregation of multiple data types, advancing integrative structural biology.