2. Academic Validation
  3. DCUN1D3 activates SCFSKP2 ubiquitin E3 ligase activity and cell cycle progression under UV damage

DCUN1D3 activates SCFSKP2 ubiquitin E3 ligase activity and cell cycle progression under UV damage

  • Oncotarget. 2016 Sep 6;7(36):58483-58491. doi: 10.18632/oncotarget.11302.
Shuai Zhang 1,  Jing Huang 1,  Taiping Shi 1 2,  Fanlei Hu 1,  Li Zhang 1,  Ping-Kun Zhou 3,  Dalong Ma 1,  Teng Ma 1 3,  Xiaoyan Qiu 1
Affiliations

Affiliations

  • 1 Department of Immunology, School of Basic Medical Sciences, Peking University, Beijing, China.
  • 2 Chinese National Human Genome Center, Beijing, China.
  • 3 Department of Radiation Toxicology and Oncology, Beijing Key Laboratory for Radiobiology (BKLRB), Beijing Institute of Radiation Medicine, Beijing, P. R. China.
PMID: 27542266 DOI: 10.18632/oncotarget.11302
Abstract

Our previous study showed that knockdown the endogenous expression of DCUN1D3 (also called SCCRO3 or DCNL3) blocked the S phase progression after UV irradiation. Here, we show that the silence of DCUN1D3 can increase the cyclin-dependent kinase inhibitor p27 protein levels after UV irradiation. Through Co-immunoprecipitation experiments, we found that DCUN1D3 bound to CAND1. And DCUN1D3 knockdown synergized with CAND1 over-expression in arresting the S phase. Given the CAND1's established role in Cullin-1 neddylation, we found Cullin-1 was less neddylated in DCUN1D3 deficient cells. So the silence of DCUN1D3 can inhibit the formation of SCFSKP2 complex by reducing Cullin-1 neddylation. Given that p27 is the primary target of SCFSKP2 complex, the cells lost DCUN1D3 showed a remarkable accumulation of p27 to cause S phase block.

Keywords

CAND1; DCUN1D3; SCFSKP2; cell cycle; p27.

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