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An ELISA for the study of calcineurin-NFAT unstructured region interaction

Nesly Dotan1, Vera Gayder2, Itai Bloch2

  • 1Biochemistry Department, MIGAL-Galilee Research Institute, Kiryat-Shmona, 11016, Israel; Faculty of Sciences and Technology, Tel-Hai Academic College, Upper Galilee, 1220800, Israel.

Analytical Biochemistry
|March 21, 2018
PubMed

Insights

We developed a cost-effective ELISA to study the calcineurin-NFAT interaction, crucial for T-cell activation. This assay aids in understanding complex formation and discovering novel protein-protein interaction inhibitors.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Immunology

Background:

  • Calcineurin is a phosphatase regulating T-cell activation by dephosphorylating the nuclear factor of activated T-cells (NFAT).
  • The calcineurin-NFAT interaction is mediated by conserved PxIxIT and LxVP motifs, essential for cellular processes.
  • Understanding this interaction is key for developing inhibitors that modulate T-cell responses.

Purpose of the Study:

  • To develop a robust and cost-effective Enzyme Linked Immuno Sorbent Assay (ELISA) for studying the calcineurin-NFAT interaction.
  • To facilitate biophysical investigations into the structure-function relationship of the calcineurin-NFAT complex.
  • To enable screening for novel protein-protein interaction inhibitors targeting calcineurin-NFAT complex formation.

Main Methods:

  • An Enzyme Linked Immuno Sorbent Assay (ELISA) was designed based on the interaction between calcineurin and the NFAT homology region.
  • The NFAT homology region encompasses key calcineurin binding sites (PxIxIT, LxVP) and phosphorylation sites.
  • The assay was validated for its robustness and cost-effectiveness.

Main Results:

  • A functional ELISA was successfully established to monitor calcineurin-NFAT complex formation.
  • The assay provides a platform for detailed structural studies of the calcineurin-NFAT interaction.
  • The developed ELISA is suitable for high-throughput screening of potential inhibitors.

Conclusions:

  • The developed ELISA is a valuable tool for elucidating the structural basis of calcineurin-NFAT complex formation.
  • This assay facilitates the discovery of specific inhibitors that disrupt the calcineurin-NFAT interaction.
  • The findings contribute to a deeper understanding of the T-cell activation switch and potential therapeutic targets.
Keywords:
Calcineurin-NFATDrug discoveryELISAProtein-protein interactionsT-cell activation

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