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2017 ; 65
(6
): 1081-1095.e5
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ERK-Induced Activation of TCF Family of SRF Cofactors Initiates a Chromatin
Modification Cascade Associated with Transcription
#MMPMID28286024
Esnault C
; Gualdrini F
; Horswell S
; Kelly G
; Stewart A
; East P
; Matthews N
; Treisman R
Mol Cell
2017[Mar]; 65
(6
): 1081-1095.e5
PMID28286024
show ga
We investigated the relationship among ERK signaling, histone modifications, and
transcription factor activity, focusing on the ERK-regulated ternary complex
factor family of SRF partner proteins. In MEFs, activation of ERK by TPA
stimulation induced a common pattern of H3K9acS10ph, H4K16ac, H3K27ac,
H3K9acK14ac, and H3K4me3 at hundreds of transcription start site (TSS) regions
and remote regulatory sites. The magnitude of the increase in histone
modification correlated well with changes in transcription. H3K9acS10ph preceded
the other modifications. Most induced changes were TCF dependent, but
TCF-independent TSSs exhibited the same hierarchy, indicating that it reflects
gene activation per se. Studies with TCF Elk-1 mutants showed that TCF-dependent
ERK-induced histone modifications required Elk-1 to be phosphorylated and
competent to activate transcription. Analysis of direct TCF-SRF target genes and
chromatin modifiers confirmed this and showed that H3S10ph required only Elk-1
phosphorylation. Induction of histone modifications following ERK stimulation is
thus directed by transcription factor activation and transcription.
|*Chromatin Assembly and Disassembly/drug effects
[MESH]