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Posttranslational Modification Assays on Functional Protein Microarrays.

Johnathan Neiswinger1, Ijeoma Uzoma1, Eric Cox2

  • 1Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205; The Center for High-Throughput Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.

Cold Spring Harbor Protocols
|October 5, 2016
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Summary
This summary is machine-generated.

Protein microarrays enable efficient identification of posttranslational modification (PTM) substrates and enzyme specificity. Assays for phosphorylation, acetylation, ubiquitylation, and SUMOylation are detailed for functional protein arrays.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Proteomics

Background:

  • Posttranslational modifications (PTMs) are crucial for protein function and regulation.
  • Identifying enzyme-substrate relationships for PTMs is essential for understanding cellular processes.
  • Existing methods for studying PTMs can be complex and time-consuming.

Purpose of the Study:

  • To present protein microarray assays for studying enzyme specificity and identifying PTM substrates.
  • To describe the adaptation of assays for phosphorylation, acetylation, ubiquitylation, and SUMOylation.
  • To establish functional protein microarrays as a tool for PTM research.

Main Methods:

  • Development of protein microarray assays for four major PTMs.
  • Utilizing functional protein microarrays to test enzyme-substrate interactions.
  • Adapting assays for single-enzyme modifications (phosphorylation, acetylation) and multi-enzyme cascades (ubiquitylation, SUMOylation).

Main Results:

  • Protein microarray assays were successfully developed for phosphorylation, acetylation, ubiquitylation, and SUMOylation.
  • Assays allow for the identification of substrates for specific enzymes.
  • The described methods facilitate the study of enzyme specificity in vitro.

Conclusions:

  • Protein microarray technology offers a powerful and adaptable platform for PTM research.
  • These assays streamline the identification of PTM substrates and enzyme specificities.
  • The developed methods are valuable for advancing the understanding of enzyme-catalyzed modifications.