Mass Spectrometric Characterization of Posttranslationally Modified Proteins—Phosphorylation

  • Martin R. Larsen
Part of the Methods in Molecular Biology™ book series (MIMB, volume 251)

Abstract

In higher organisms, the majority of proteins are posttranslationally modified at some stage, very often resulting in an essential change in the function of the protein. Some modifications change the protein solubility, others are used as molecular switches and thus modify biological activity, whereas others are used to locate proteins to different cell compartments (e.g., ref. 1). Because a given modification results in a change in the molecular mass of the affected amino acid, mass spectrometry (MS) with its unique sensitivity, high mass accuracy, and its ability to deal with complex mixtures, is the method of choice for characterization of posttranslational modifications (2, 3, 4).

Keywords

Graphite Acetonitrile Syringe Immobilization Serine 

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Copyright information

© Humana Press Inc. 2004

Authors and Affiliations

  • Martin R. Larsen
    • 1
  1. 1.Protein Research Group, Department of Molecular Biology and BiochemistryUniversity of Southern DenmarkOdenseDenmark

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