A combination of computational and experimental approaches identifies DNA sequence constraints associated with target site binding specificity of the transcription factor CSL
Contreras, Ashley N
Glen, Robert C
Kovall, Rhett A
Nucleic Acids Research
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Torella, R., Li, J., Kinrade, E., Cerda-Moya, G., Contreras, A. N., Foy, R., Stojnic, R., et al. (2014). A combination of computational and experimental approaches identifies DNA sequence constraints associated with target site binding specificity of the transcription factor CSL. Nucleic Acids Research https://doi.org/10.1093/nar/gku730
Regulation of transcription is fundamental to development and physiology, and occurs through binding of transcription factors to specific DNA sequences in the genome. CSL (CBF1/Suppressor of Hairless/LAG-1), a core component of the Notch signaling pathway, is one such transcription factor that acts in concert with co-activators or co-repressors to control the activity of associated target genes. One fundamental question is how CSL can recognize and select among different DNA sequences available in vivo and whether variations between selected sequences can influence its function. We have therefore investigated CSL–DNA recognition using computational approaches to analyze the energetics of CSL bound to different DNAs and tested the in silico predictions with in vitro and in vivo assays. Our results reveal novel aspects of CSL binding that may help explain the range of binding observed in vivo. In addition, using molecular dynamics simulations, we show that domain–domain correlations within CSL differ significantly depending on the DNA sequence bound, suggesting that different DNA sequences may directly influence CSL function. Taken together, our results, based on computational chemistry approaches, provide valuable insights into transcription factor-DNA binding, in this particular case increasing our understanding of CSL–DNA interactions and how these may impact on its transcriptional control.
BBSRC [BB/J008842/1 to S.J.B., B.A., Dr Steve Russell.]; National Institutes of Health (NIH) [CA178974 to R.A.K.] and a Leukemia and Lymphoma Society Scholar Award (to R.A.K.); Unilever (to R.T. and R.G.). China Scholarship Council Cambridge (to J.L.); BBSRC Studentship (to R.A.F.); NIH training [5T32ES007250 to A.N.C.]. Funding for open access charge: University RCUK Open Access Fund.
External DOI: https://doi.org/10.1093/nar/gku730
This record's URL: https://www.repository.cam.ac.uk/handle/1810/245768
Attribution 2.0 UK: England & Wales
Licence URL: http://creativecommons.org/licenses/by/2.0/uk/
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