1. Signaling Pathways
  2. PROTAC
  3. PROTAC Linkers

PROTAC Linkers

PROTACs (Proteolysis Targeting Chimeric Molecules) are heterobifunctional protein degraders and promising targeted therapeutics candidates for cancer. The PROTAC linker connects two functional motifs of a PROTAC, a target protein binder and an E3 ligase recruiter.

The linker plays an important role in a PROTAC. The features of the linker (type, length, attachment position) can affect the formation of ligase:PROTAC:target ternary complex, resulting in influencing the efficient ubiquitination of the target protein and its ultimate degradation. The optimal lengths of the PROTAC linkers are reported varying from 12-carbon to over 20-carbon, and the commonly used linkers in the development of PROTACs are PEGs, Alkyl-Chain and Alkyl/ether.

Cat. No. Product Name CAS No. Purity Chemical Structure
  • HY-140889
    Biotin-PEG4-NHS ester 459426-22-3 99.56%
    Biotin-PEG4-NHS ester is a biotin-labeled, PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    Biotin-PEG4-NHS ester
  • HY-W008574A
    TGN-020 sodium 1313731-99-5 99.96%
    TGN-020 sodium is a selective Aquaporin 4 (AQP4) inhibitor with an IC50 of 3.1 μM. TGN-020 sodium is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs. TGN-020 sodium alleviates edema and inhibits glial scar formation after spinal cord compression injury in rats.
    TGN-020 sodium
  • HY-107608
    Leukotriene B4 71160-24-2 ≥98.0%
    Leukotriene B4 (LTB4) is known as one of the most potent chemoattractants and activators of leukocytes and is involved in inflammatory diseases. Leukotriene B4 is also an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs.
    Leukotriene B4
  • HY-126885
    DBCO-PEG5-NHS ester 2144395-59-3
    DBCO-PEG5-NHS ester is a PEG/Alkyl/ether-based PROTAC linker can be used in the synthesis of PROTACs. DBCO-PEG5-NHS ester is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). DBCO-PEG5-NHS ester is a click chemistry reagent, it contains a DBCO group that can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing Azide groups.
    DBCO-PEG5-NHS ester
  • HY-W007713
    Fmoc-8-amino-3,6-dioxaoctanoic acid 166108-71-0 99.98%
    Fmoc-8-amino-3,6-dioxaoctanoic acid (Fmoc-NH-PEG2-CH2COOH) is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Fmoc-8-amino-3,6-dioxaoctanoic acid is also a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    Fmoc-8-amino-3,6-dioxaoctanoic acid
  • HY-140335
    Alkynyl myristic acid 82909-47-5
    Alkynyl myristic acid is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs. Alkynyl myristic acid is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    Alkynyl myristic acid
  • HY-W007803
    Boc-NH-C4-Br 164365-88-2 ≥98.0%
    Boc-NH-C4-Br is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs.
    Boc-NH-C4-Br
  • HY-W008474
    Boc-NH-PEG2-C2-NH2 153086-78-3 99.01%
    Boc-NH-PEG2-C2-NH2 (PROTAC Linker 13) is a PEG-based PROTAC linker can be used in the synthesis of PROTACs.
    Boc-NH-PEG2-C2-NH2
  • HY-124011
    m-PEG3-aldehyde 356066-46-1
    m-PEG3-aldehyde is a PEG-based PROTAC linker can be used in the synthesis of PROTACs.
    m-PEG3-aldehyde
  • HY-108374
    4-Azidobutylamine 88192-20-5 ≥98.0%
    4-Azidobutylamine is a PROTAC linker, which refers to the alkyl chain composition. 4-Azidobutylamine can be used in the synthesis of a series of PROTACs. PROTACs contain two different ligands connected by a linker; one is a ligand for an E3 ubiquitin ligase and the other is for the target protein. PROTACs exploit the intracellular ubiquitin-proteasome system to selectively degrade target proteins. 4-Azidobutylamine is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    4-Azidobutylamine
  • HY-128834
    N3-PEG4-C2-NH2 951671-92-4 ≥98.0%
    N3-PEG4-C2-NH2 (PROTAC Linker 20) is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. N3-PEG4-C2-NH2 is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    N3-PEG4-C2-NH2
  • HY-22340
    Azido-PEG4-alcohol 86770-67-4 98.64%
    Azido-PEG4-alcohol is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Azido-PEG4-alcohol is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    Azido-PEG4-alcohol
  • HY-138461
    Azido-PEG1 1517-05-1 99.95%
    Azido-PEG1 is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Azido-PEG1 is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    Azido-PEG1
  • HY-130653
    Azido-PEG4-C2-acid 1257063-35-6 ≥98.0%
    Azido-PEG4-C2-acid a PEG-based PROTAC linker can be used in the synthesis of vRucaparib-TP4. Azido-PEG4-C2-acid is also a non-cleavable 4 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Azido-PEG4-C2-acid is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    Azido-PEG4-C2-acid
  • HY-42776
    NH2-PEG3-C2-NH-Boc 101187-40-0 99.88%
    NH2-PEG3-C2-NH-Boc (PROTAC Linker 15) is a PEG-based PROTAC linker can be used in the synthesis of PROTACs.
    NH2-PEG3-C2-NH-Boc
  • HY-W017772
    Boc-NH-PEG3 139115-92-7 ≥98.0%
    Boc-NH-PEG3 (PROTAC Linker 10) is a PEG-based PROTAC linker can be used in the synthesis of PROTACs.
    Boc-NH-PEG3
  • HY-140921
    Biotin-PEG4-amino-t-Bu-DADPS-C6-azide 1260247-50-4
    Biotin-PEG4-amino-t-Bu-DADPS-C6-azide is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Biotin-PEG4-amino-t-Bu-DADPS-C6-azide is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    Biotin-PEG4-amino-t-Bu-DADPS-C6-azide
  • HY-140212
    Azido-PEG1-amine 464190-91-8 ≥98.0%
    Azido-PEG1-amine is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Azido-PEG1-amine is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
    Azido-PEG1-amine
  • HY-130907
    Fmoc-N-PEG24-acid 2170484-59-8 99.91%
    Fmoc-N-PEG24-acid is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    Fmoc-N-PEG24-acid
  • HY-140736
    DSPE-PEG-Biotin, MW 2000 385437-57-0
    DSPE-PEG-Biotin, MW 2000 is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    DSPE-PEG-Biotin, MW 2000

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