Chromatin Kinases Act on Transcription Factors and Histone Tails in Regulation of Inducible Transcription

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The inflammatory response requires coordinated activation of both transcription factors and chromatin to induce transcription for defense against pathogens and environmental insults. We sought to elucidate the connections between inflammatory signaling pathways and chromatin through genomic footprinting of kinase activity and unbiased identification of prominent histone phosphorylation events. We identified H3 serine 28 phosphorylation (H3S28ph) as the principal stimulation-dependent histone modification and observed its enrichment at induced genes in mouse macrophages stimulated with bacterial lipopolysaccharide. Using pharmacological and genetic approaches, we identified mitogen-and stress-activated protein kinases (MSKs) as primary mediators of H3S28ph in macrophages. Cell-free transcription assays demonstrated that H3S28ph directly promotes p300/CBP-dependent transcription. Further, MSKs can activate both signal-responsive transcription factors and the chromatin template with additive effects on transcription. Specific inhibition of MSKs in macrophages selectively reduced transcription of stimulation-induced genes. Our results suggest that MSKs incorporate upstream signaling inputs and control multiple downstream regulators of inducible transcription.
Publisher
CELL PRESS
Issue Date
2016-10
Language
English
Article Type
Article
Keywords

CELL IDENTITY GENES; H3 PHOSPHORYLATION; SUPER-ENHANCERS; IN-VIVO; MSK1; ACTIVATION; ACETYLTRANSFERASE; ACETYLATION; INHIBITION; STRESS

Citation

MOLECULAR CELL, v.64, no.2, pp.347 - 361

ISSN
1097-2765
DOI
10.1016/j.molcel.2016.09.026
URI
http://hdl.handle.net/10203/219656
Appears in Collection
CH-Journal Papers(저널논문)
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