MV-1-NH-Me

Target: This ligand targets inhibitor of apoptosis proteins cIAP1, cIAP2, and XIAP through BIR domains in biochemical or cellular target-engagement studies.

Mechanism of Action: Used as the target-protein recognition element, this ligand provides the binding interface for inhibitor of apoptosis proteins cIAP1, cIAP2, and XIAP through BIR domains. In PROTAC design, a derivatizable position on the ligand can be connected through an optimized linker to an E3 ligase ligand, such as a CRBN, VHL, or IAP recruiter, while preserving productive target engagement. The resulting bifunctional molecule brings inhibitor of apoptosis proteins cIAP1 into proximity with the recruited E3 ligase, enabling ternary-complex formation. If the complex has favorable geometry and residence time, target lysine ubiquitination is promoted, leading to proteasome-dependent degradation in experimental systems.

• PROTAC-Mediated Target Degradation: MV-1-NH-Me can be used as a ligand component in PROTAC designs to recruit an E3 ubiquitin ligase and drive ubiquitination of a chosen target protein. This enables systematic evaluation of degradation potency, including dose–response behavior, degradation kinetics, and dependence on proteasome activity in engineered cell models.

• Ligase Recruitment Optimization: Incorporating MV-1-NH-Me into chimeric degraders supports structure–function studies aimed at tuning ternary complex formation. Researchers can vary linker length, attachment position, and stereochemistry to optimize E3 engagement, thereby improving target residence time, degradation selectivity, and resistance to off-target ubiquitination.

• Mechanistic Studies of Ubiquitination: MV-1-NH-Me–based PROTACs are suitable for dissecting the molecular sequence leading to targeted protein loss. Experiments can include ubiquitin chain profiling, co-immunoprecipitation of ternary complexes, and time-resolved degradation assays to determine whether degradation follows canonical proteasomal routing and how ubiquitin transfer efficiency correlates with potency.

• Target Selectivity Profiling: MV-1-NH-Me can be applied in PROTAC panels to compare degradation across homologous proteins or pathway-relevant targets. By measuring changes in target abundance alongside pathway readouts, researchers can map selectivity determinants and identify degradation signatures that distinguish productive engagement from non-degradative binding.

• Linker and Conjugation Engineering: As a ligand handle, MV-1-NH-Me can be leveraged to explore conjugation strategies that influence PROTAC geometry. Systematic linker and functional group modifications can be used to modulate effective cooperativity, optimize cellular permeability and stability, and determine how these parameters impact degradation magnitude and duration.

MV-1-NH-Me is an IAP-recruiting ligand scaffold for IAP-based PROTAC construction. Its peptidomimetic recognition core should be preserved during linker installation.

Structure: MV-1-NH-Me is an IAP ligand built from peptidomimetic amide motifs, a proline-derived ring, cyclohexyl and diphenylmethyl substituents, and a terminal N-methyl amide. The structure is stereochemically defined and highly amide-rich.

Reactivity: MV-1-NH-Me is best used as an IAP-recruiting E3 ligase ligand scaffold. Linker installation should be performed on a validated amide or N-substituent vector in analogs that preserve the IAP-recognition peptidomimetic core. Alkyl or PEG linkers can connect this IAP ligand to target-protein ligands, but the parent N-methyl amide is not itself a broadly reactive coupling handle.