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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...
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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Resolving Affinity Purified Protein Complexes by Blue Native PAGE and Protein Correlation Profiling
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Database interrogation algorithms for identification of proteins in proteomic separations.

Patricia M Palagi1, Frédérique Lisacek, Ron D Appel

  • 1Swiss Institute of Bioinformatics, CMU-1, 1 Rue Michel Servet, CH-1211, Geneva 4, Switzerland.

Methods in Molecular Biology (Clifton, N.J.)
|April 22, 2009
PubMed
Summary

This study explores protein identification methods using mass spectrometry (MS) and tandem MS. It details the use of Aldente and Phenyx software for analyzing peptide masses and fragmentation patterns to identify known or novel proteins.

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Area of Science:

  • Proteomics
  • Mass Spectrometry
  • Bioinformatics

Background:

  • Protein identification is crucial for understanding proteomes.
  • Traditional methods involve 2-DE gel electrophoresis, enzymatic digestion, and mass spectrometry.
  • Analyzing peptide masses and fragmentation patterns aids in protein discovery.

Purpose of the Study:

  • To provide an overview of protein and peptide identification techniques.
  • To focus on the application of specific software tools for mass spectrometry data analysis.
  • To discuss algorithms for matching experimental data against protein databases.

Main Methods:

  • Utilizing mass spectrometry (MS) to measure peptide masses.
  • Employing tandem mass spectrometry (MS/MS) for peptide fragmentation analysis.
  • Using bioinformatics algorithms and software (Aldente, Phenyx) for database searching and protein identification.

Main Results:

  • Demonstrated the process of protein identification through spectral analysis.
  • Highlighted the distinct roles of Aldente for MS and Phenyx for tandem MS data.
  • Emphasized the importance of database interrogation for identifying known and novel proteins.

Conclusions:

  • Software tools like Aldente and Phenyx are essential for efficient protein identification.
  • Mass spectrometry-based proteomics enables comprehensive proteome investigation.
  • Accurate protein identification is fundamental for advancing biological research.