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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Genome+Res
2016 ; 26
(5
): 612-23
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Comprehensive benchmarking reveals H2BK20 acetylation as a distinctive signature
of cell-state-specific enhancers and promoters
#MMPMID26957309
Kumar V
; Rayan NA
; Muratani M
; Lim S
; Elanggovan B
; Xin L
; Lu T
; Makhija H
; Poschmann J
; Lufkin T
; Ng HH
; Prabhakar S
Genome Res
2016[May]; 26
(5
): 612-23
PMID26957309
show ga
Although over 35 different histone acetylation marks have been described, the
overwhelming majority of regulatory genomics studies focus exclusively on H3K27ac
and H3K9ac. In order to identify novel epigenomic traits of regulatory elements,
we constructed a benchmark set of validated enhancers by performing 140 enhancer
assays in human T cells. We tested 40 chromatin signatures on this unbiased
enhancer set and identified H2BK20ac, a little-studied histone modification, as
the most predictive mark of active enhancers. Notably, we detected a novel class
of functionally distinct enhancers enriched in H2BK20ac but lacking H3K27ac,
which was present in all examined cell lines and also in embryonic forebrain
tissue. H2BK20ac was also unique in highlighting cell-type-specific promoters. In
contrast, other acetylation marks were present in all active promoters,
regardless of cell-type specificity. In stimulated microglial cells, H2BK20ac was
more correlated with cell-state-specific expression changes than H3K27ac, with
TGF-beta signaling decoupling the two acetylation marks at a subset of regulatory
elements. In summary, our study reveals a previously unknown connection between
histone acetylation and cell-type-specific gene regulation and indicates that
H2BK20ac profiling can be used to uncover new dimensions of gene regulation.