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The nucleosome acidic patch directly interacts with subunits of the Paf1 and FACT complexes and controls chromatin architecture in vivo

Christine E. Cucinotta, A. Elizabeth Hildreth, Brendan M. McShane, Margaret K. Shirra, Karen M. Arndt
doi: https://doi.org/10.1101/637223
Christine E. Cucinotta
Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260
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A. Elizabeth Hildreth
Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260
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Brendan M. McShane
Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260
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Margaret K. Shirra
Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260
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Karen M. Arndt
Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260
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  • For correspondence: arndt@pitt.edu
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Abstract

The nucleosome core regulates DNA-templated processes through the highly conserved nucleosome acidic patch. While structural and biochemical studies have shown that the acidic patch controls chromatin factor binding and activity, few studies have elucidated its functions in vivo. We employed site-specific crosslinking to identify proteins that directly bind the acidic patch in Saccharomyces cerevisiae and demonstrated crosslinking of histone H2A to Paf1 complex subunit Rtf1 and FACT subunit Spt16. Rtf1 bound to nucleosomes through its histone modification domain, supporting its role as a cofactor in H2B K123 ubiquitylation. An acidic patch mutant showed defects in nucleosome positioning and occupancy genome-wide. Our results provide new information on the chromatin engagement of two central players in transcription elongation and emphasize the importance of the nucleosome core as a hub for proteins that regulate chromatin during transcription.

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Posted May 17, 2019.
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The nucleosome acidic patch directly interacts with subunits of the Paf1 and FACT complexes and controls chromatin architecture in vivo
Christine E. Cucinotta, A. Elizabeth Hildreth, Brendan M. McShane, Margaret K. Shirra, Karen M. Arndt
bioRxiv 637223; doi: https://doi.org/10.1101/637223
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The nucleosome acidic patch directly interacts with subunits of the Paf1 and FACT complexes and controls chromatin architecture in vivo
Christine E. Cucinotta, A. Elizabeth Hildreth, Brendan M. McShane, Margaret K. Shirra, Karen M. Arndt
bioRxiv 637223; doi: https://doi.org/10.1101/637223

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