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  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
製品番号 製品名 CAS 番号 純度 構造式
  • 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
  • HY-140797
    Azido-PEG2-alcohol 139115-90-5 99.49%
    Azido-PEG2-alcohol is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Azido-PEG2-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-PEG2-alcohol
  • 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-W008005
    Amino-PEG4-alcohol

    Amino-PEG4-alcohol

    		86770-74-3 99.81%
    Amino-PEG4-alcohol is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Amino-PEG4-alcohol is also a non-cleavable 4 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
    Amino-PEG4-alcohol
  • 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-W040135
    Fmoc-NH-PEG8-CH2CH2COOH 756526-02-0 98.77%
    Fmoc-NH-PEG8-CH2CH2COOH is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
    Fmoc-NH-PEG8-CH2CH2COOH
  • HY-140087
    N-(Amino-PEG2)-N-bis(PEG3-azide) 2606952-86-5 99.93%
    N-(Amino-PEG2)-N-bis(PEG3-azide) is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. N-(Amino-PEG2)-N-bis(PEG3-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.
    N-(Amino-PEG2)-N-bis(PEG3-azide)
  • HY-W045598
    Boc-C16-COOH 843666-40-0 99.98%
    Boc-C16-COOH is a non-cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Boc-C16-COOH is also a alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs
    Boc-C16-COOH
  • HY-W015088
    Amino-PEG3-C2-Amine

    Amino-PEG3-C2-Amine

    		929-75-9 99.78%
    Amino-PEG3-C2-Amine is a PEG-based (3 units) PROTAC linker can be used in the synthesis of PROTACs.
    Amino-PEG3-C2-Amine
  • HY-140752
    DOTA-PEG5-azide 3104986-47-9 98.0%
    DOTA-PEG5-azide is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. DOTA-PEG5-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.
    DOTA-PEG5-azide
  • 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-78378
    4-4-Boc-piperazinemethylphenylboronic acid pinacol ester 470478-90-1 98.50%
    4-(4-Boc-piperazinemethyl)phenylboronic acid pinacol ester is a PROTAC linker that can be used in the synthesis of CST905 (HY-175435).
    4-4-Boc-piperazinemethylphenylboronic acid pinacol ester
  • HY-42773
    tert-Butyl (8-aminooctyl)carbamate 88829-82-7
    tert-Butyl (8-aminooctyl)carbamate (1-Boc-1,8-diaminooctane) can be used as a PROTAC linker in the synthesis of PROTACs. tert-butyl (8-aminooctyl)carbamate is an alkane chain with terminal amine and Boc-protected amino groups. Amine group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The Boc group can be deprotected under mild acidic conditions to form the free amine.
    tert-Butyl (8-aminooctyl)carbamate
  • HY-108368
    Azido-PEG2-CH2COOH 882518-90-3 99.51%
    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-W040132
    Boc-NH-PEG4-CH2CH2COOH

    Boc-NH-PEG4-CH2CH2COOH

    		756525-91-4 99.85%
    Boc-NH-PEG4-CH2CH2COOH is a PEG-based PROTAC linker can be used in the synthesis of PROTAC. Boc-NH-PEG4-CH2CH2COOH is also a cleavable ADC linker used as a linker for antibody-drug conjugates (ADC).
    Boc-NH-PEG4-CH2CH2COOH
  • HY-W016735
    Azido-PEG3-alcohol

    Azido-PEG3-alcohol

    		86520-52-7 98.17%
    Azido-PEG3-alcohol is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Azido-PEG3-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-PEG3-alcohol
  • HY-140914
    Biotin-PEG4-Amide-C6-Azide 1006592-62-6 99.29%
    Biotin-PEG4-Amide-C6-Azide is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Biotin-PEG4-Amide-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-Amide-C6-Azide
  • HY-140706
    m-PEG2000-thiol 134874-49-0 99.80%
    m-PEG2000-thiol is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    m-PEG2000-thiol
  • HY-140698
    m-PEG5000-NHS ester

    m-PEG-NHS ester (MW 5000)

    		92451-01-9
    m-PEG5000-NHS ester is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    m-PEG5000-NHS ester
  • HY-W004710
    NH2-C5-NH-Boc

    N-Boc-cadaverine

    		51644-96-3 99.59%
    NH2-C5-NH-Boc (PROTAC Linker 23) is an alkyl chain-based PROTAC linker can be used in the synthesis of PROTACs.
    NH2-C5-NH-Boc
PROTAC Linkers Isoform Comparison

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