Boc-NH-PEG3-C2-triazole-DBCO-PEG4-VC-PAB-DMEA is a heterobifunctional, click-reactive PROTAC linker–payload conjugate featuring a Boc-protected amine, a short PEG3 segment, a C2-substituted triazole, and a DBCO (dibenzocyclooctyne) handle for strain-promoted azide–alkyne cycloaddition. A longer PEG4 spacer separates the click site from the VC (valine–citrulline)–PAB (para-aminobenzyl) motif, followed by DMEA (dimethylamino) substitution that supports controlled presentation of the degradation-relevant moiety. In PROTAC design, this scaffold enables modular assembly by covalently coupling an azide-bearing targeting ligand to the DBCO-bearing partner under mild conditions, while the PEG spacers and triazole maintain productive geometry and solubility. The VC–PAB element is commonly used to position protease-sensitive or self-immolative features that can facilitate intracellular processing, thereby improving the effective engagement and turnover of the target protein. This product is valuable for researchers building flexible, bioorthogonally assembled targeted degradation constructs and for optimizing linker length and cleavage/presentation for structure–activity studies.
* For research and manufacturing use only. Not for human or clinical use.
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This PROTAC linker reagent is designed to enable efficient, modular assembly of targeted protein degraders by combining a PEG-based solubilizing scaffold with bioorthogonal click handles and a cleavable/functionalized connection motif. Its architecture supports flexible conjugation, improved aqueous compatibility, and reliable coupling strategies commonly used to generate PROTACs with defined stoichiometry and tunable linker length. Detailed structural and synthetic guidance is provided below.
Structure: The molecule contains PEG ether segments that confer hydrophilicity and conformational flexibility, alongside a triazole linkage and a DBCO cyclooctyne moiety for strain-promoted azide–alkyne cycloaddition. It also includes Boc-protected amine functionality and additional amide/ester-forming elements that support stable conjugation chemistry.
Reactivity: Use the DBCO group for strain-promoted click reactions with azide-bearing partners under mild, catalyst-free conditions in compatible aqueous or mixed-solvent systems. Subsequent PROTAC construction can incorporate amide-forming coupling to connect functional warhead/ligand fragments, while Boc deprotection is typically employed to reveal reactive amines for controlled conjugation. Solvent choice and pH should be optimized to preserve azide stability and maintain linker integrity.
* Our calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
It is commonly abbreviated as: C1V1 = C2V2
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