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Updated: Dec 10, 2025

Enhanced Yeast One-hybrid Screens To Identify Transcription Factor Binding To Human DNA Sequences
Published on: February 11, 2019
A uniform expression library for the exploration of FOX transcription factor biology
Lavanya Moparthi1, Stefan Koch1
1Department of Biomedical and Clinical Sciences (BKV), Linköping University, Linköping, Sweden; Wallenberg Centre for Molecular Medicine (WCMM), Linköping University, Linköping, Sweden.
Abstract:
Forkhead box (FOX) family transcription factors play essential roles in development, tissue homeostasis, and disease. Although the biology of several FOX proteins has been studied in depth, it is unclear to what extent these findings apply to even closely related family members, which frequently exert overlapping but non-redundant functions. To help address this question, we have generated a uniform, ready-to-use expression library of all 44 human FOX transcription factors with a convenient peptide tag for parallel screening assays. In addition, we have generated multiple universal forkhead box reporter plasmids, which can be used to monitor the transcriptional activity of most FOX proteins with high fidelity. As a proof-of-principle, we use our plasmid library to identify the DNA repair protein XRCC6/Ku70 as a selective FOX interaction partner and regulator of FOX transcriptional activity. We believe that these tools, which we make available via the Addgene plasmid repository, will considerably expedite the investigation of FOX protein biology.
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