Time-resolved analysis of DNA-protein interactions in living cells by UV laser pulses

Angela Nebbioso, Rosaria Benedetti, Mariarosaria Conte, Vincenzo Carafa, Floriana De Bellis, Jani Shaik, Filomena Matarese, Bartolomeo Della Ventura, Felice Gesuele, Raffaele Velotta, Joost H.A. Martens, Hendrik G. Stunnenberg, Carlo Altucci, Lucia Altucci

Research output: Contribution to journalArticlepeer-review


Interactions between DNA and proteins are mainly studied through chemical procedures involving bi-functional reagents, mostly formaldehyde. Chromatin immunoprecipitation is used to identify the binding between transcription factors (TFs) and chromatin, and to evaluate the occurrence and impact of histone/DNA modifications. The current bottleneck in probing DNA-protein interactions using these approaches is caused by the fact that chemical crosslinkers do not discriminate direct and indirect bindings or short-lived chromatin occupancy. Here, we describe a novel application of UV laser-induced (L-) crosslinking and demonstrate that a combination of chemical and L-crosslinking is able to distinguish between direct and indirect DNA-protein interactions in a small number of living cells. The spatial and temporal dynamics of TF bindings to chromatin and their role in gene expression regulation may thus be assessed. The combination of chemical and L-crosslinking offers an exciting and unprecedented tool for biomedical applications.

Original languageEnglish
Article number11725
JournalScientific Reports
Issue number1
Publication statusPublished - Dec 1 2017

ASJC Scopus subject areas

  • General


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