High-throughput scintillation proximity assay for transglutaminase activity measurement

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14 Citations (Scopus)

Abstract

Members of the transglutaminase enzyme family are involved in a broad range of biological phenomena, including haemostasis, apoptosis, semen coagulation, skin formation, and wound healing. A new and rapid method for measurement of transglutaminase activity is described in this article. The enzyme links tritium-labeled putrescine to biotinylated oligoglutamine, and the tritiated peptide is bound to a streptavidin-coated microtiter plate permanently covered by a thin layer of scintillant. Only the radioisotope incorporated into the peptide substrate is close enough to the scintillant molecules for photons to be produced. The signal generation depends on the transglutaminase activity, and it can be detected by appropriate light-measuring instrumentation without separation steps. The assay is sensitive, specific, linear at concentrations of tissue transglutaminase between 0.05 and 1.6 mU/ml, and suitable for high-throughput measurements.

Original languageEnglish
Pages (from-to)256-262
Number of pages7
JournalAnalytical Biochemistry
Volume343
Issue number2
DOIs
Publication statusPublished - Aug 15 2005

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Keywords

  • GTP
  • Inhibition
  • Oligoglutamine
  • Putrescine
  • Substrate
  • Tritium

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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