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2017 ; 36
(21
): 3232-3249
Nephropedia Template TP
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RBPJ/CBF1 interacts with L3MBTL3/MBT1 to promote repression of Notch signaling
via histone demethylase KDM1A/LSD1
#MMPMID29030483
Xu T
; Park SS
; Giaimo BD
; Hall D
; Ferrante F
; Ho DM
; Hori K
; Anhezini L
; Ertl I
; Bartkuhn M
; Zhang H
; Milon E
; Ha K
; Conlon KP
; Kuick R
; Govindarajoo B
; Zhang Y
; Sun Y
; Dou Y
; Basrur V
; Elenitoba-Johnson KS
; Nesvizhskii AI
; Ceron J
; Lee CY
; Borggrefe T
; Kovall RA
; Rual JF
EMBO J
2017[Nov]; 36
(21
): 3232-3249
PMID29030483
show ga
Notch signaling is an evolutionarily conserved signal transduction pathway that
is essential for metazoan development. Upon ligand binding, the Notch
intracellular domain (NOTCH ICD) translocates into the nucleus and forms a
complex with the transcription factor RBPJ (also known as CBF1 or CSL) to
activate expression of Notch target genes. In the absence of a Notch signal, RBPJ
acts as a transcriptional repressor. Using a proteomic approach, we identified
L3MBTL3 (also known as MBT1) as a novel RBPJ interactor. L3MBTL3 competes with
NOTCH ICD for binding to RBPJ In the absence of NOTCH ICD, RBPJ recruits L3MBTL3
and the histone demethylase KDM1A (also known as LSD1) to the enhancers of Notch
target genes, leading to H3K4me2 demethylation and to transcriptional repression.
Importantly, in vivo analyses of the homologs of RBPJ and L3MBTL3 in Drosophila
melanogaster and Caenorhabditis elegans demonstrate that the functional link
between RBPJ and L3MBTL3 is evolutionarily conserved, thus identifying L3MBTL3 as
a universal modulator of Notch signaling in metazoans.