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The antiobesity factor WDTC1 suppresses adipogenesis via the CRL4WDTC1 E3 ligase.

EMBO Rep. 2016 May;17(5):638-47. Epub 2016 Apr 09
Beezly S Groh 1 , Feng Yan 2 , Matthew D Smith 2 , Yanbao Yu 1 , Xian Chen 1 , Yue Xiong 3
Beezly S Groh 1 , Feng Yan 2 , Matthew D Smith 2 , Yanbao Yu 1 , Xian Chen 1 , Yue Xiong 3
+ et al

[No authors listed]

Author information
  • 1 Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, USA.
  • 2 Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA.
  • 3 Department of Biochemistry and Biophysics, University of North Carolina, Chapel Hill, NC, USA Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA yxiong@email.unc.edu.

摘要


WDTC1/Adp encodes an evolutionarily conserved suppressor of lipid accumulation. While reduced WDTC1 expression is associated with obesity in mice and humans, its cellular function is unknown. Here, we demonstrate that WDTC1 is a component of a DDB1-CUL4-ROC1 (CRL4) E3 ligase. Using 3T3-L1 cell culture model of adipogenesis, we show that disrupting the interaction between WDTC1 and DDB1 leads to a loss of adipogenic suppression by WDTC1, increased triglyceride accumulation and adipogenic gene expression. We show that the CRL4(WDTC) (1) complex promotes histone H2AK119 monoubiquitylation, thus suggesting a role for this complex in transcriptional repression during adipogenesis. Our results identify a biochemical role for WDTC1 and extend the functional range of the CRL4 complex to the suppression of fat accumulation.

KEYWORDS: WDTC1, adipose, adp, cullins, obesity