MS4078

Target: MS4078 targets anaplastic lymphoma kinase, including NPM-ALK and EML4-ALK fusion proteins.

Binding site: Its ALK-binding ligand engages the ATP-binding catalytic cleft of ALK.

Mechanism of action: MS4078 is a cereblon-based ALK PROTAC that promotes selective degradation of ALK fusion proteins through the ubiquitin-proteasome system. By connecting an ALK-recognition ligand with a CRBN-recruiting moiety, MS4078 induces proximity between ALK and CRL4CRBN, leading to polyubiquitination and proteasomal clearance. Reported studies show concentration- and time-dependent reduction of NPM-ALK and EML4-ALK, with associated suppression of ALK autophosphorylation and STAT3 phosphorylation. MS4078 is useful for comparing ALK kinase inhibition with full protein depletion in lymphoma and lung cancer research models.

• PROTAC-Mediated Kinase Degradation: MS4078 is employed in the targeted degradation of specific kinases, providing a powerful tool for studying kinase function in cellular signaling pathways. By degrading target kinases, researchers can elucidate their roles and interactions, advancing our understanding of cellular mechanisms and potential therapeutic targets.

• Targeted Protein Degradation in Cancer Research: MS4078 is utilized in cancer research to selectively degrade oncogenic proteins. This application enables the investigation of protein function in tumorigenesis and the identification of novel anti-cancer strategies, offering insights into the development of more effective therapeutic interventions.

• PROTAC-Induced E3 Ligase Recruitment: With MS4078, researchers can explore the recruitment of E3 ligases to specific protein targets, facilitating the study of ubiquitination processes. This aids in understanding the dynamics of protein turnover and the regulatory mechanisms that control protein stability within the cell.

• Investigating Protein-Protein Interactions: MS4078 assists in dissecting protein-protein interactions by promoting the degradation of one interaction partner. This approach allows scientists to study the effects of disrupting these interactions on cellular function, contributing to the mapping of complex biological networks.