Nedd8 targets ubiquitin ligase Smurf2 for neddylation and promote its degradation
Related Experiment Video
Updated: Mar 22, 2026

Detection of Protein Ubiquitination
Published on: August 19, 2009
Jingyi Shu1, Chao Liu1, Rongfei Wei2
1Department of Cell Biology, Anhui Medical University, Hefei, Anhui Province 230032, China; State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 100850, China.
Abstract:
E3 ubiquitin ligases are pivotal effectors of the ubiquitin-proteasome system as they determine the substrate specificity and transfer ubiquitin to the substrate. HECT-type ubiquitin ligase Smad ubiquitination regulatory factor 2 (Smurf2) has been demonstrated functions as a tumor suppressor. However, the mechanisms underlying regulation of Smurf2 is still unclear. Here we show that ubiquitin-like protein Nedd8 targets the HECT-type ubiquitin ligase Smurf2 for neddylation, and promotes Smurf2 degradation. Neddylation of Smurf1 activates its ubiquitin ligase activity and Smurf2 exerts Nedd8 ligase activity. This study provided new clues of Smurf2 activation regulation.
Related Concept Videos
Regulated Protein Degradation
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Regulated Protein Degradation
Nonsense-mediated mRNA Decay
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
The Proteasome
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
The Proteasome
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
Export of Misfolded Proteins out of the ER

