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2014 ; 55
(6
): 843-855
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English Wikipedia
SIRT1-mediated deacetylation of CRABPII regulates cellular retinoic acid
signaling and modulates embryonic stem cell differentiation
#MMPMID25155613
Tang S
; Huang G
; Fan W
; Chen Y
; Ward JM
; Xu X
; Xu Q
; Kang A
; McBurney MW
; Fargo DC
; Hu G
; Baumgart-Vogt E
; Zhao Y
; Li X
Mol Cell
2014[Sep]; 55
(6
): 843-855
PMID25155613
show ga
Retinoid homeostasis is critical for normal embryonic development. Both the
deficiency and excess of these compounds are associated with congenital
malformations. Here we demonstrate that SIRT1, the most conserved mammalian
NAD?-dependent protein deacetylase, contributes to homeostatic retinoic acid (RA)
signaling and modulates mouse embryonic stem cell (mESC) differentiation in part
through deacetylation of cellular retinoic acid binding protein II (CRABPII). We
show that RA-mediated acetylation of CRABPII at K102 is essential for its nuclear
accumulation and subsequent activation of RA signaling. SIRT1 interacts with and
deacetylates CRABPII, regulating its subcellular localization. Consequently,
SIRT1 deficiency induces hyperacetylation and nuclear accumulation of CRABPII,
enhancing RA signaling and accelerating mESC differentiation in response to RA.
Consistently, SIRT1 deficiency is associated with elevated RA signaling and
development defects in mice. Our findings reveal a molecular mechanism that
regulates RA signaling and highlight the importance of SIRT1 in regulation of ESC
pluripotency and embryogenesis.