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-42569
    Methyl 3-hydroxypropanoate 6149-41-3 99.83%
    Methyl 3-hydroxypropanoate is an alkyl/ether-based PROTAC linker that can be used in the synthesis of PROTACs.
    Methyl 3-hydroxypropanoate
  • HY-126889
    Bis-PEG5-NHS ester 756526-03-1 99.64%
    Bis-PEG5-NHS ester is a PEG/Alkyl/ether-based PROTAC linker can be used in the synthesis of PROTACs. Bis-PEG5-NHS ester is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
    Bis-PEG5-NHS ester
  • HY-W006445
    N-Boc-PEG2-bromide 165963-71-3 ≥98.0%
    N-Boc-PEG2-bromide is a PEG/Alkyl/ether-based PROTAC linker can be used in the synthesis of PROTACs. N-Boc-PEG2-bromide is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
    N-Boc-PEG2-bromide
  • HY-W040135
    Fmoc-NH-PEG8-CH2CH2COOH 756526-02-0 ≥98.0%
    Fmoc-NH-PEG8-CH2CH2COOH is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).
    Fmoc-NH-PEG8-CH2CH2COOH
  • HY-W092043
    TLR4-IN-C34-C2-COOH 1159408-54-4
    TLR4-IN-C34-C2-COO is a linker that incorporates TLR4 inhibitor TLR4-IN-C34. TLR4-IN-C34 inhibits TLR4 in enterocytes and macrophages, and reduces systemic inflammation in mouse models of endotoxemia and necrotizing enterocolitis.
    TLR4-IN-C34-C2-COOH
  • HY-W022240
    NH2-PEG5-C2-NH-Boc 189209-27-6
    NH2-PEG5-C2-NH-Boc (PROTAC Linker 17) is a PEG-based PROTAC linker can be used in the synthesis of PROTACs.
    NH2-PEG5-C2-NH-Boc
  • HY-130184
    Azido-PEG8-NHS ester 1204834-00-3 ≥98.0%
    Azido-PEG8-NHS ester is a cleavable 8 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Azido-PEG8-NHS ester is also a PEG- and Alkyl/ether-based PROTAC linker that can be used in the synthesis of PROTACs. Azido-PEG8-NHS ester 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-PEG8-NHS ester
  • HY-W008005
    Amino-PEG4-alcohol 86770-74-3 99.73%
    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-108369
    Azido-PEG1-CH2CO2H 79598-48-4 99.58%
    Azido-PEG1-CH2CO2H is a PROTAC linker, which refers to the alkyl/ether composition. Azido-PEG1-CH2CO2H can be used in the synthesis of PROTAC BRD4 Degrader-1. Azido-PEG1-CH2CO2H 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-CH2CO2H
  • HY-151716
    Halo-DBCO 1808119-16-5 98.00%
    Halo-DBCO is a click chemistry reagent containing dibenzocyclooctyne (DBCO). Halo-DBCO can be used as a ligand to react with HaloTag to form covalent HaloTag ligand couples.
    Halo-DBCO
  • HY-140215
    Azido-PEG6-amine 957486-82-7
    Azido-PEG6-amine is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Azido-PEG6-amine is also a non-cleavable 6 unit PEG ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Azido-PEG6-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-PEG6-amine
  • 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-W040132
    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-140895
    Biotin-PEG4-amine 663171-32-2 ≥98.0%
    Biotin-PEG4-amine is a biotin-labeled, PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    Biotin-PEG4-amine
  • HY-W008279
    Amino-PEG2-NH-Boc 127828-22-2 ≥98.0%
    Amino-PEG2-NH-Boc is a PEG-based PROTAC linker can be used in the synthesis of PROTACs.
    Amino-PEG2-NH-Boc
  • HY-W018745
    Tetraethylene glycol 112-60-7 99.97%
    Tetraethylene glycol (PROTAC Linker 18) is a PEG-based PROTAC linker can be used in the synthesis of PROTACs.
    Tetraethylene glycol
  • HY-133400
    endo-BCN-PEG3-mal 2141976-33-0 98.00%
    endo-BCN-PEG3-mal is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. endo-BCN-PEG3-mal is a click chemistry reagent, it contains a BCN group that can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing Azide groups.
    endo-BCN-PEG3-mal
  • HY-140765
    Azido-PEG4-NHS-ester 1807534-82-2
    Azido-PEG4-NHS-ester is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. Azido-PEG4-NHS-ester 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-NHS-ester
  • HY-140314
    DOTA-PEG5-C6-DBCO
    DOTA-PEG5-C6-DBCO is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. DOTA-PEG5-C6-DBCO is a click chemistry reagent, it contains a DBCO group that can undergo strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing Azide groups.
    DOTA-PEG5-C6-DBCO
  • HY-69220
    7-Octynoic acid 10297-09-3 ≥98.0%
    7-Octynoic acid (compound 42) is a PROTAC linker and 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. 7-Octynoic 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.
    7-Octynoic acid
PROTAC Linkers Isoform Comparison

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