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J Biomol Screen. 2007 Jun;12(4):560-7. Epub 2007 May 3.

Evaluation of different glutathione S-transferase-tagged protein captures for screening E6/E6AP interaction inhibitors using AlphaScreen.

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  • 1Chemical Biology Core Facility EMBL Meyerhofstrasse 1 D-69117 Heidelberg, Germany. sehr@embl.de


Human papillomavirus (HPV) infection is responsible for the development of cervical cancer and its premalignant lesions in women. The virus-encoded oncogene E6 is a promising target for an anti-HPV drug therapy. The authors describe the development of a homogenous screening assay for inhibitors of the E6 interaction with its cellular target, the E6-associated protein (E6AP), based on AlphaScreen technology. The E6 protein was expressed and purified as glutathione S-transferase (GST) fusion protein, and the binding to a biotinylated E6AP peptide was monitored using GST-detecting Acceptor beads coated either with anti-GST antibody or glutathione. After optimization of the assay conditions, a commercial library of 3000 compounds was screened for inhibitors. Active compounds were retested and counterscreened for E6/E6AP specificity using biotinylated GST as a control protein. The results obtained with both types of GST-detecting reagents correlated very well and demonstrated the great potential of the newly developed glutathione-coated Acceptor beads as a detection reagent for GST fusion proteins.

[PubMed - indexed for MEDLINE]
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