Abstract
SUMO posttranslational modification directs gene transcription and epigenetic programming to support normal cell function. The dynamic nature of SUMO-modification makes it difficult to identify endogenous protein substrates. Isolation of chromatin-bound SUMO targets is exceptionally challenging, as conventional immunoprecipitation assays are inefficient at concentrating this protein population. This chapter describes a protocol that effectively precipitates chromatin-associated fractions of SUMOylated heterochromatin protein 1α in cultured cells. Techniques to enrich endogenous SUMO substrates at the chromatin are also demonstrated and discussed. This approach could be adapted to evaluate chromatin-bound SUMO targets in additional in vivo systems.
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Bawa-Khalfe, T. (2016). Isolation of In Vivo SUMOylated Chromatin-Bound Proteins. In: Rodriguez, M. (eds) SUMO. Methods in Molecular Biology, vol 1475. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-6358-4_15
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DOI: https://doi.org/10.1007/978-1-4939-6358-4_15
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