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Related Concept Videos

Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
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,...
Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
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Mass Spectrometry: Complex Analysis

Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...

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Navigating the Mass Spectrometry-Based Proteomic Data Using Free Computational Tools
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Navigating the Mass Spectrometry-Based Proteomic Data Using Free Computational Tools

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Decoding signalling networks by mass spectrometry-based proteomics.

Chunaram Choudhary1, Matthias Mann

  • 1The Novo Nordisk Foundation Center for Protein Research, Faculty of Health Sciences, University of Copenhagen, 2200 Copenhagen, Denmark. chuna.choudhary@cpr.ku.dk

Nature Reviews. Molecular Cell Biology
|May 13, 2010
PubMed
Summary
This summary is machine-generated.

Precision proteomics using mass spectrometry offers a system-wide view of cell signalling. This technology accurately quantifies thousands of proteins and their modifications, advancing our understanding of biological networks.

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Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry
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Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry

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Area of Science:

  • Cellular biology
  • Biochemistry
  • Proteomics

Background:

  • Signalling networks are crucial for cellular and organismal biology, in both health and disease.
  • Traditional methods like western blots have limitations in studying these complex networks.
  • Large-scale proteomics provides a comprehensive approach to analyze signalling events.

Purpose of the Study:

  • To highlight the capabilities of large-scale precision proteomics in characterizing signalling networks.
  • To discuss the application of mass spectrometry for system-wide analysis of post-translational modifications and protein interactions.
  • To explore the potential of proteomics in understanding cellular responses to perturbations.

Main Methods:

  • Utilizing mass spectrometry for large-scale, system-wide characterization of signalling events.
  • Analyzing post-translational modifications (PTMs), protein-protein interactions, and protein expression changes.
  • Investigating quantitative changes in thousands of proteins in response to various perturbations.

Main Results:

  • Precision proteomics delivers accurate and unbiased quantitative data on proteins and their modifications.
  • The technology enables the study of multiple PTMs, including phosphorylation, acetylation, methylation, glycosylation, and ubiquitylation.
  • System-wide analysis reveals comprehensive insights into signalling pathways.

Conclusions:

  • Large-scale proteomics is revolutionizing the study of signalling networks.
  • This approach provides unprecedented detail on cellular signalling mechanisms.
  • Future research will increasingly rely on proteomics for a fundamental understanding of cell biology and disease.