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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 Nat+Commun
2017 ; 8
(ä): 14806
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EcR recruits dMi-2 and increases efficiency of dMi-2-mediated remodelling to
constrain transcription of hormone-regulated genes
#MMPMID28378812
Kreher J
; Kova? K
; Bouazoune K
; Ma?inkovi? I
; Ernst AL
; Engelen E
; Pahl R
; Finkernagel F
; Murawska M
; Ullah I
; Brehm A
Nat Commun
2017[Apr]; 8
(ä): 14806
PMID28378812
show ga
Gene regulation by steroid hormones plays important roles in health and disease.
In Drosophila, the hormone ecdysone governs transitions between key developmental
stages. Ecdysone-regulated genes are bound by a heterodimer of ecdysone receptor
(EcR) and Ultraspiracle. According to the bimodal switch model, steroid hormone
receptors recruit corepressors in the absence of hormone and coactivators in its
presence. Here we show that the nucleosome remodeller dMi-2 is recruited to
ecdysone-regulated genes to limit transcription. Contrary to the prevalent model,
recruitment of the dMi-2 corepressor increases upon hormone addition to constrain
gene activation through chromatin remodelling. Furthermore, EcR and dMi-2 form a
complex that is devoid of Ultraspiracle. Unexpectedly, EcR contacts the dMi-2
ATPase domain and increases the efficiency of dMi-2-mediated nucleosome
remodelling. This study identifies a non-canonical EcR-corepressor complex with
the potential for a direct regulation of ATP-dependent nucleosome remodelling by
a nuclear hormone receptor.