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Related Concept Videos

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...
Protein Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...

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Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
10:01

Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies

Published on: November 28, 2017

StavroX--a software for analyzing crosslinked products in protein interaction studies.

Michael Götze1, Jens Pettelkau, Sabine Schaks

  • 1Institute of Biochemistry and Biotechnology, Martin-Luther University Halle-Wittenberg, Halle (Saale), Germany.

Journal of the American Society for Mass Spectrometry
|November 1, 2011
PubMed
Summary

A new software, StavroX, simplifies the analysis of complex chemical crosslinking mass spectrometry datasets. This tool enhances protein interaction studies by automating data processing, reducing analysis time, and offering a user-friendly interface.

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Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
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Area of Science:

  • Biochemistry
  • Structural Biology
  • Proteomics

Background:

  • Chemical crosslinking coupled with mass spectrometry (MS) provides low-resolution structural insights into proteins and complexes.
  • Analyzing large MS datasets from crosslinking experiments is challenging due to a lack of specialized software.

Purpose of the Study:

  • To introduce StavroX, a novel software designed for the analysis of complex chemical crosslinking mass spectrometry data.
  • To demonstrate the utility of StavroX in handling large and intricate crosslinking datasets.

Main Methods:

  • Development of StavroX software with a graphical user interface.
  • Automated analysis of mass spectrometry (MS) and tandem mass spectrometry (MS/MS) data.
  • Evaluation of StavroX using three distinct biological systems: calmodulin-Munc13 peptide complex, N-terminal ß-laminin fragment, and guanylyl cyclase activating protein-2/retinal guanylyl cyclase peptide complex.

Main Results:

  • StavroX effectively analyzes complex crosslinking datasets.
  • The software features an intuitive graphical user interface.
  • Automated MS and MS/MS data analysis significantly reduces processing time.
  • Successful application across diverse biological systems, including protein-peptide and protein-protein interactions.

Conclusions:

  • StavroX addresses the software limitations in analyzing large chemical crosslinking MS datasets.
  • The software's efficiency and ease of use are expected to promote chemical crosslinking as a routine technique for protein interaction studies.