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A cell-based, quantitative and isoform-specific assay for exchange proteins directly activated by cAMP.


ABSTRACT: Extensive functional studies of the exchange protein directly activated by cAMP (EPAC) family of signaling molecules have demonstrated that EPAC proteins play a fundamental role in several physiological and pathophysiological responses, therefore are attractive drug targets. In this report, the development of a cell-based, medium to high throughput screening assay that is capable of monitoring EPAC-mediated activation of cellular Rap1 in an isoform-specific manner is described. This assay adapts a conventional ELISA format with immobilized RalGDS-RBD as a bait to selectively capture GTP-bound active Rap1. As a result, it fills an urgent need for a cell-based EPAC assay that can be conveniently performed using microtiter plates for the discovery and/or validation of isoform-specific EPAC agonists and antagonists.

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC5524698 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature

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A cell-based, quantitative and isoform-specific assay for exchange proteins directly activated by cAMP.

Zhu Yingmin Y   Mei Fang F   Luo Pei P   Cheng Xiaodong X  

Scientific reports 20170724 1


Extensive functional studies of the exchange protein directly activated by cAMP (EPAC) family of signaling molecules have demonstrated that EPAC proteins play a fundamental role in several physiological and pathophysiological responses, therefore are attractive drug targets. In this report, the development of a cell-based, medium to high throughput screening assay that is capable of monitoring EPAC-mediated activation of cellular Rap1 in an isoform-specific manner is described. This assay adapts  ...[more]

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