Sumoylation of the human histone H4 tail inhibits p300-mediated transcription by RNA polymerase II in cellular extracts
- University of Washington, United States
- The Rockefeller University, United States
- University Washington, United States
Abstract
The post-translational modification of histones by the small ubiquitin-like modifier (SUMO) protein has been associated with gene regulation, centromeric localization and double-strand break repair in eukaryotes. Although sumoylation of histone H4 was specifically associated with gene repression, this could not be proven due to the challenge of site-specifically sumoylating H4 in cells. Biochemical crosstalk between SUMO and other histone modifications, such as H4 acetylation and H3 methylation, that are associated with active genes also remains unclear. We addressed these challenges in mechanistic studies using an H4 chemically modified at Lys12 by SUMO-3 (H4K12su) and incorporated into mononucleosomes and chromatinized plasmids for functional studies. Mononucleosome-based assays revealed that H4K12su inhibits transcription-activating H4 tail acetylation by the histone acetyltransferase p300, as well as transcription-associated H3K4 methylation by the extended catalytic module of the Set1/COMPASS histone methyltransferase complex. Activator- and p300-dependent in vitro transcription assays with chromatinized plasmids revealed that H4K12su inhibits both H4 tail acetylation and RNA polymerase II-mediated transcription. Finally, cell-based assays with a SUMO-H4 fusion that mimics H4 tail sumoylation confirmed the negative crosstalk between histone sumoylation and acetylation/methylation. Thus, our studies establish the key role for histone sumoylation in gene silencing and its negative biochemical crosstalk with active transcription-associated marks in human cells.
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All data generated or analyzed during this study are included in the manuscript and supporting files.
Article and author information
Author details
Calvin Jon A Leonen
Champak Chatterjee
Funding
NIH NCI (R01CA234561)
- Robert G Roeder
NIH NIDDK (R01DK071900)
- Robert G Roeder
NIH NIGMS (R01GM110430)
- Champak Chatterjee
NIH NIGMS (T32GM008268)
- Calvin Jon A Leonen
NSF GRFP (DGH-1256082)
- Caroline E Weller
NIH NICHD (R01HD097408)
- Ning Zheng
NIH NIDDK (R01DK103667)
- R David Hawkins
NIH NIAMS (R01AR065952)
- R David Hawkins
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Copyright
© 2021, Leonen et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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Sumoylation of the human histone H4 tail inhibits p300-mediated transcription by RNA polymerase II in cellular extracts
eLife 10:e67952.
https://doi.org/10.7554/eLife.67952
