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2014 ; 56
(2
): 298-310
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BS69/ZMYND11 reads and connects histone H3 3 lysine 36 trimethylation-decorated
chromatin to regulated pre-mRNA processing
#MMPMID25263594
Guo R
; Zheng L
; Park JW
; Lv R
; Chen H
; Jiao F
; Xu W
; Mu S
; Wen H
; Qiu J
; Wang Z
; Yang P
; Wu F
; Hui J
; Fu X
; Shi X
; Shi YG
; Xing Y
; Lan F
; Shi Y
Mol Cell
2014[Oct]; 56
(2
): 298-310
PMID25263594
show ga
BS69 (also called ZMYND11) contains tandemly arranged PHD, BROMO, and PWWP
domains, which are chromatin recognition modalities. Here, we show that BS69
selectively recognizes histone variant H3.3 lysine 36 trimethylation (H3.3K36me3)
via its chromatin-binding domains. We further identify BS69 association with RNA
splicing regulators, including the U5 snRNP components of the spliceosome, such
as EFTUD2. Remarkably, RNA sequencing shows that BS69 mainly regulates intron
retention (IR), which is the least understood RNA alternative splicing event in
mammalian cells. Biochemical and genetic experiments demonstrate that BS69
promotes IR by antagonizing EFTUD2 through physical interactions. We further show
that regulation of IR by BS69 also depends on its binding to H3K36me3-decorated
chromatin. Taken together, our study identifies an H3.3K36me3-specific reader and
a regulator of IR and reveals that BS69 connects histone H3.3K36me3 to regulated
RNA splicing, providing significant, important insights into chromatin regulation
of pre-mRNA processing.