How do PROTACs degrade target proteins?

PROTACs degrade target proteins by bringing the selected protein into proximity with an E3 ubiquitin ligase. This induced-proximity event can support ubiquitin transfer to the target protein, after which the proteasome recognizes and degrades the ubiquitinated substrate. The process depends on target binding, E3 ligase recruitment, ternary-complex geometry, linker design, and cellular assay context, so degradation performance must be confirmed with functional readouts rather than predicted only from binding affinity.

How should researchers choose PROTAC linkers?

Researchers should choose PROTAC linkers by considering linker length, flexibility, polarity, rigidity, attachment points, and compatibility with both ligands. The linker must preserve target and E3 ligase binding while positioning the two proteins in a geometry that supports productive ubiquitination. BOC Sciences can support linker selection through PROTAC linker products, linker design resources, and custom analog planning for research teams comparing multiple degrader architectures.

What E3 ligases are common in PROTAC design?

Common E3 ligases used in PROTAC design include cereblon, VHL, IAP family members, and MDM2-related systems. Each ligase system has different ligand chemistry, expression context, localization behavior, and ternary-complex requirements. Because degradation depends on the compatibility between the target protein and recruited ligase, researchers often compare several E3 recruitment strategies before selecting the most informative degrader series for further study.

What assays help evaluate PROTAC activity?

PROTAC activity is commonly evaluated through target degradation analysis, binding affinity measurement, ternary-complex assessment, ubiquitination studies, and proteasome-pathway controls. Concentration-response and time-course experiments are also useful for identifying degradation kinetics, selectivity trends, concentration windows, and possible hook-effect behavior. BOC Sciences provides assay-related support that can help researchers connect compound structure with target protein loss, pathway dependence, and structure-activity relationship interpretation.

Can BOC Sciences support custom PROTAC projects?

BOC Sciences can support custom PROTAC projects involving target ligand selection, E3 ligase ligand choice, linker design, degrader synthesis, analog series planning, and degradation-focused evaluation. This support is designed for research use and can help teams move from a target hypothesis to a practical set of compounds for experimental testing. Technical communication can also help align product selection with assay design and project objectives.