Related Experiment Video
Updated: Feb 10, 2026

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition
Published on: February 1, 2012
Cullin3/KCTD5 induces monoubiquitination of ΔNp63α and impairs its activity
Hanbing He1, Yougong Peng2, Shijie Fan1
1Center of Growth, Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China.
Abstract:
Potassium channel tetramerization domain containing 5 (KCTD5) was previously documented as a component of the Cullin3-RING ligase (CRL3). It has been reported that KCTD5 can induce enrichment of polyubiquitinated proteins, and KCTD5-based CRL3 destabilizes several proteins. In our present study, we report that KCTD5 may physically interact with ΔNp63α, which is a member of the p53 family. Our further investigation revealed that Cullin3/KCTD5 can induce monoubiquitination of ΔNp63α. Cullin3/KCTD5 downregulates the DNA-binding affinity of ΔNp63α, impairing either its transactivity or its transinhibitory activity. Functionally, Cullin3/KCTD5 abates the proproliferation activity of ΔNp63α. These findings suggest that KCTD5-based CRL3 may mediate monoubiquitination and is a novel regulator of ΔNp63α.
Related Concept Videos
Factors Affecting Renal Clearance: Renal Impairment
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment
Induced-fit Model
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
Co-activators and Co-repressors
tRNA Activation
Activation Energy

