2. Signaling Pathways
  3. PROTAC
  4. PROTAC Linkers

PROTAC Linkers

PROTAC Linkers

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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.

PROTAC Linkers Isoform Specific Products:

PROTAC Linkers Isoform Comparison
Cat. No. Product Name CAS No. Purity Chemical Structure
  • HY-W096093
    2-(2-(6-chlorohexyloxy)ethoxy)ethanamine hydrochloride 1035373-85-3 99.71%
    2-(2-(6-chlorohexyloxy)ethoxy)ethanamine (hydrochloride) is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    2-(2-(6-chlorohexyloxy)ethoxy)ethanamine hydrochloride
  • HY-140214
    Azido-PEG5-amine 516493-93-9 ≥98.0%
    Azido-PEG5-amine is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Azido-PEG5-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-PEG5-amine
  • 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-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-W046471
    N-Boc-PEG4-bromide 1076199-21-7 ≥98.0%
    N-Boc-PEG4-bromide is a PEG/Alkyl/ether-based PROTAC linker can be used in the synthesis of PROTACs. N-Boc-PEG4-bromide is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
    N-Boc-PEG4-bromide
  • HY-W008352
    Boc-NH-PEG4-CH2CH2NH2 811442-84-9 ≥98.0%
    Boc-NH-PEG4-CH2CH2NH2 a cleavable 5 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Boc-NH-PEG4-CH2CH2NH2 is also a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    Boc-NH-PEG4-CH2CH2NH2
  • HY-W004945
    3,6-Dioxaoctanedioic acid 23243-68-7 ≥98.0%
    36-Dioxaoctanedioic acid is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    3,6-Dioxaoctanedioic acid
  • HY-140941
    Biotin-PEG2-C2-iodoacetamide 292843-75-5 98.23%
    Biotin-PEG2-C2-iodoacetamide is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    Biotin-PEG2-C2-iodoacetamide
  • HY-30105
    N-Boc-piperazine 57260-71-6 99.97%
    N-Boc-piperazine is a Alkyl/ether-based PROTAC linker that can be used in the synthesis of PROTAC PD-1/PD-L1 degrader-1 (HY-131183).
    N-Boc-piperazine
  • HY-130283
    Methyltetrazine-Ph-NHS ester 1644644-96-1 98.61%
    Methyltetrazine-Ph-NHS ester is an alkyl/ether-based PROTAC linker that can be used in the synthesis of PROTACs. Methyltetrazine-Ph-NHS ester is a click chemistry reagent, it contains a Tetrazine group that can undergo an inverse electron demand Diels-Alder reaction (iEDDA) with molecules containing TCO groups.
    Methyltetrazine-Ph-NHS ester
  • HY-140341
    Sulfo-NHS-Acetate 152305-87-8 ≥98.0%
    Sulfo-NHS-Acetate is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs.
    Sulfo-NHS-Acetate
  • HY-130291
    Biotin-PEG3-NHS ester 1253286-56-4 99.35%
    Biotin-PEG3-NHS ester is a PEG-based PROTAC linker can be used in the synthesis of PROTAC.
    Biotin-PEG3-NHS ester
  • HY-108368
    Azido-PEG2-CH2COOH 882518-90-3 99.03%
    Azido-PEG2-CH2COOH is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Azido-PEG2-CH2COOH 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-PEG2-CH2COOH
  • HY-126887
    Mal-PEG8-NHS ester 2055033-05-9 98.96%
    Mal-PEG8-NHS ester is a PEG-based PROTAC linker can be used in the synthesis of PROTACs.
    Mal-PEG8-NHS ester
  • HY-126957
    Biotin-PEG2-azide 1910803-72-3
    Biotin-PEG2-azide is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Biotin-PEG2-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-PEG2-azide
  • HY-42490
    N3-PEG3-CH2CH2COOH 1056024-94-2 ≥98.0%
    N3-PEG3-CH2CH2COOH a PEG-based PROTAC linker can be used in the synthesis of BI-3663 (HY-111546), BI-4216 and BI-0319. Azido-PEG3-acid is also a non-cleavable 3 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs). N3-PEG3-CH2CH2COOH 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-PEG3-CH2CH2COOH
  • HY-135820
    m-PEG12-acid 2135793-73-4 99.12%
    m-PEG12-acid is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    m-PEG12-acid
  • HY-130485
    Bromo-PEG2-C2-azide 530151-56-5 98.70%
    Bromo-PEG2-C2-azide is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Bromo-PEG2-C2-azide is also a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Bromo-PEG2-C2-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.
    Bromo-PEG2-C2-azide
  • HY-130324
    Azido-PEG7-amine 1333154-77-0
    Azido-PEG7-amine is a non-cleavable 7 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Azido-PEG7-amine is also a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Azido-PEG7-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-PEG7-amine
  • HY-33615
    Methyl azetidine-3-carboxylate hydrochloride 100202-39-9 99.66%
    Methyl azetidine-3-carboxylate hydrochloride is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Methyl azetidine-3-carboxylate hydrochloride is also a alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs<
    Methyl azetidine-3-carboxylate hydrochloride
PROTAC Linkers Isoform Comparison

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