کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1929146 | 1050446 | 2012 | 5 صفحه PDF | دانلود رایگان |
In humans, mutations in the gene encoding cereblon (CRBN) are associated with mental retardation. Although CRBN has been investigated in several cellular contexts, its function remains unclear. Here, we demonstrate that CRBN plays a role in regulating the ubiquitin–proteasome system (UPS). Heterologous expression of CRBN inhibited proteasome activity in a human neuroblastoma cell line. Furthermore, proteasome subunit beta type 4 (PSMB4), the β7 subunit of the 20S core complex, was identified as a direct binding partner of CRBN. These findings suggest that CRBN may modulate proteasome activity by directly interacting with the β7 subunit.
► Cereblon (CRBN) directly interacts with the 20S proteasome subunit PSMB4.
► GFPu accumulates in cells expressing exogenous CRBN.
► Suppressing endogenous CRBN strongly enhances proteasome activity.
Journal: Biochemical and Biophysical Research Communications - Volume 427, Issue 3, 26 October 2012, Pages 618–622