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-118411
    5-Ethynyl-2'-deoxyuridine 61135-33-9 99.77%
    5-Ethynyl-2'-deoxyuridine (EdU), a thymidine analogue, is incorporated into cellular DNA during DNA replication and the subsequent reaction of EdU with a fluorescent azide in a “Click” reaction. EdU staining is a fast, sensitive and reproducible method to study cell proliferation. 5-Ethynyl-2'-deoxyuridine is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs. 5-Ethynyl-2'-deoxyuridine is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    5-Ethynyl-2'-deoxyuridine
  • HY-W008574
    TGN-020 51987-99-6 99.52%
    TGN-020 is a selective Aquaporin 4 (AQP4) inhibitor with an IC50 of 3.1 μM. TGN-020 is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs.TGN-020 alleviates edema and inhibits glial scar formation after spinal cord compression injury in rats.
    TGN-020
  • HY-40171
    NH2-C2-NH-Boc 57260-73-8 99.52%
    NH2-C2-NH-Boc (PROTAC Linker 22) is a alkyl chain-based PROTAC linker can be used in the synthesis of PROTACs.
    NH2-C2-NH-Boc
  • HY-140272
    DBCO-PEG4-NHS ester 1427004-19-0
    DBCO-PEG4-NHS ester is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs. DBCO-PEG4-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-PEG4-NHS ester
  • HY-140346A
    L-Azidohomoalanine hydrochloride 942518-29-8 99.76%
    L-Azidohomoalanine hydrochloride is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs. L-Azidohomoalanine (hydrochloride) 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. Strain-promoted alkyne-azide cycloaddition (SPAAC) can also occur with molecules containing DBCO or BCN groups.
    L-Azidohomoalanine hydrochloride
  • HY-W096162A
    NH2-PEG2-methyl acetate hydrochloride 208647-73-8
    NH2-PEG2-methyl acetate is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    NH2-PEG2-methyl acetate hydrochloride
  • HY-47373
    Folate-PEG3-C2-acid
    Folate-PEG3-C2-acid is the acid fragment of Folate-PEG3-NHS ester (HY-133493), which belongs to the PEG-type PROTAC linker and is used to synthesize PROTAC molecules.
    Folate-PEG3-C2-acid
  • HY-133454A
    Mal-PEG2-oxyamine TFA
    Mal-PEG2-oxyamine TFA is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    Mal-PEG2-oxyamine TFA
  • 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-W021401
    Amino-PEG3-C2-Azido 134179-38-7 99.67%
    Amino-PEG3-C2-Azido is a PEG-based PROTAC linker can be used in the synthesis of the PARP1 degrader iRucaparib-TP3 (HY-130645). Amino-PEG3-C2-Azido 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. Strain-promoted alkyne-azide cycloaddition (SPAAC) can also occur with molecules containing DBCO or BCN groups.
    Amino-PEG3-C2-Azido
  • HY-130143
    Biotin-PEG3-azide 875770-34-6
    Biotin-PEG3-azide is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Biotin-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. Strain-promoted alkyne-azide cycloaddition (SPAAC) can also occur with molecules containing DBCO or BCN groups.
    Biotin-PEG3-azide
  • HY-W040304
    Alkynyl Palmitic Acid 99208-90-9
    Alkynyl Palmitic Acid (Alk-C16) is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs. Alkynyl Palmitic 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 Palmitic Acid
  • HY-130458
    EGNHS 70539-42-3
    EGNHS is an alkyl/ether-based PROTAC linker that can be used in the synthesis of PROTACs.
    EGNHS
  • HY-136159
    3-Mercaptopropionic acid NHS ester 117235-10-6
    3-Mercaptopropanyl-N-hydroxysuccinimide ester is an alkyl/ether-based PROTAC linker that can be used in the synthesis of PROTACs.
    3-Mercaptopropionic acid NHS ester
  • 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-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-W007713
    Fmoc-8-amino-3,6-dioxaoctanoic acid 166108-71-0 99.73%
    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-W096119
    NH2-PEG2-C6-Cl 744203-60-9 ≥98.0%
    NH2-PEG2-C6-Cl is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    NH2-PEG2-C6-Cl
  • HY-140345
    L-Homopropargylglycine 98891-36-2 ≥98.0%
    L-Homopropargylglycine is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs. L-homopropargylglycine is an amino acid analog of methionine containing an alkyne moiety that can undergo a classic click chemical reaction with azide containing Alexa Fluor.
    L-Homopropargylglycine
  • HY-W000434
    Fmoc-NH-PEG4-CH2CH2COOH 557756-85-1 99.92%
    Fmoc-NH-PEG4-CH2CH2COOH is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Fmoc-NH-PEG4-CH2CH2COOH is also a PEG-based PROTAC linker that can be used in the synthesis of PROTACs.
    Fmoc-NH-PEG4-CH2CH2COOH

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