2. Signaling Pathways
  3. Cell Cycle/DNA Damage
  4. Topoisomerase

Topoisomerase

Topoisomerase

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Topoisomerases are enzymes that regulate the overwinding or underwinding of DNA. The winding problem of DNA arises due to the intertwined nature of its double-helical structure. Topoisomerases are isomerase enzymes that act on the topology of DNA. Type I topoisomerase cuts one strand of a DNA double helix, relaxation occurs, and then the cut strand is reannealed. Type I topoisomerases are subdivided into two subclasses: type IA topoisomerases, which share many structural and mechanistic features with the type II topoisomerases, and type IB topoisomerases, which utilize a controlled rotary mechanism. Type II topoisomerase cuts both strands of one DNA double helix, pass another unbroken DNA helix through it, and then reanneal the cut strands. This class is also split into two subclasses: type IIA and type IIB topoisomerases, which possess similar structure and mechanisms.

Topoisomerase Isoform Specific Products:

Topoisomerase Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-143692
    SQDG
    		Inhibitor ≥99.0%
    SQDG inhibits topoisomerase I and P-selectin receptor, exhibits anti-inflammatory, antiviral and antitumor activities. SQDG is a glycolipid that possesses sugar moieties in their head groups. SQDG is a membrane lipid that can be used to investigate the effects of structural lipid in LNP formulations.
    SQDG
  • HY-N0872
    Isosteviol
    		Inhibitor ≥98.0%
    Isosteviol ((-)-Isosteviol) is a derivative of Stevioside through acid catalyzed hydrolysis of Stevioside. Isosteviol inhibits DNA polymerase and DNA topoisomerase and has antibacterial, anticancer and anti-tuberculosis effects.
    Isosteviol
  • HY-B0330B
    Levofloxacin hydrochloride
    		Inhibitor ≥98.0%
    Levofloxacin ((-)-Ofloxacin) hydrochloride is an orally active antibiotic and is active against both Gram-positive and Gram-negative bacteria. Levofloxacin hydrochloride inhibits the DNA gyrase and topoisomerase IV. Levofloxacin hydrochloride can be used for chronic periodontitis, airway inflammation and BK Viremia research. Levofloxacin hydrochloride shows anti-orthopoxvirus activity.
    Levofloxacin hydrochloride
  • HY-106031
    F-14512
    F-14512 is a targeted cytotoxic compound that utilizes the polyamine transport system (PTS) to selectively deliver polyamine-containing drugs to cancer cells. F-14512 combines an epipodophyllotoxin core that targets topoisomerase II with a spermine group that acts as a cell delivery vehicle, with improved selectivity for tumor cells. F-14512 exhibits significant cytotoxicity against cells with high PTS activity and demonstrates high potency in multiple human cell lines (median IC50=0.18 μM). In the MX1 breast tumor xenograft model, F-14512 exhibits potent antitumor activity.
    F-14512
  • HY-100620
    RPR121056
    		Inhibitor 99.88%
    RPR121056 (APC) is a metabolite of Irinotecan (CPT-11), which is generated by CYP3A4. Irinotecan (CPT-11) is an antineoplastic agent that inhibits topoisomerase type I, causing cell death, and is widely used in the treatment of colorectal cancer. Irinotecan also directly inhibits AChE.
    RPR121056
  • HY-W010800A
    Cholesterol hemisuccinate Tris salt
    		Inhibitor ≥98.0%
    Cholesterol hemisuccinate Tris salt (CHS-Tris) is a with hepatoprotective an anticancer activity. Cholesterol hemisuccinate Tris salt inhibits Acetaminophen (AAP, HY-66005) hepatotoxicity, and prevents AAP-induced hepatic apoptosis and necrosis. Cholesterol hemisuccinate Tris salt inhibits DNA polymerase and DNA topoisomerase to inhibit DNA replication and repair and cell division. Thus, Cholesterol hemisuccinate Tris salt inhibits tumor growth.
    Cholesterol hemisuccinate Tris salt
  • HY-160015
    CB07-Exatecan
    		Inhibitor 98.97%
    CB07-Exatecan is an ADC drug-Linker conjugate that can be used for the synthesis of ADCs. ADC conjugated with CB07-Exatecan and trastuzumab inhibits the growth of HER2-positive cancer cells. CB07-Exatecan can be used in cancer research.
    CB07-Exatecan
  • HY-N0114A
    (±)-Evodiamine
    		Inhibitor 99.74%
    (±)-Evodiamine, a quinazolinocarboline alkaloid, is a Top1 inhibitor. Evodiamine exhibits anti-inflammatory, antiobesity, and antitumor effects. (±)-Evodiamine inhibits the proliferation of a wide variety of tumor cells by inducing their apoptosis.
    (±)-Evodiamine
  • HY-14812
    Karenitecin
    		Inhibitor 98.02%
    Karenitecin (Cositecan) is a topoisomerase I inhibitor, with potent anti-cancer activity.
    Karenitecin
  • HY-148819
    NH2-bicyclo[1.1.1]pentane-7-MAD-MDCPT
    		Inhibitor 98.71%
    NH2-bicyclo[1.1.1]pentane-7-MAD-MDCPT (compound I) is a topoisomerase I inhibitor, which can be delivered to cells through conjugated antibody targeting, and has good ADC activity in vivo and in vitro.
    NH2-bicyclo[1.1.1]pentane-7-MAD-MDCPT
  • HY-13670
    Lurtotecan
    		Inhibitor 98.01%
    Lurtotecan (GI147211; OSI-211), a semisynthetic Camptothecin analog, is a topoisomerase I inhibitor. Lurtotecan has anticancer effects.
    Lurtotecan
  • HY-N6011
    9-Methoxycamptothecin
    		Inhibitor 99.13%
    9-Methoxycamptothecin (MCPT), isolated from Camptotheca acuminata, has antitumor activities through topoisomerase inhibition. 9-Methoxycamptothecin (MCPT) induces strong G2/M arrest and apoptosis in cancer.
    9-Methoxycamptothecin
  • HY-153069
    GGFG-PAB-Exatecan
    		Inhibitor 99.71%
    GGFG-PAB-Exatecan consists of an ADC toxin Exatecan (HY-13631) and a linker GGFG-PAB, and can be used as a drug-linker conjugate for the synthesis of ADC molecules.
    GGFG-PAB-Exatecan
  • HY-43564
    Exatecan Intermediate 5
    		Inhibitor 99.98%
    Exatecan Intermediate 5 is the intermediate of Exatecan (HY-13631) And Exatecan (DX-8951) is a DNA topoisomerase I inhibitor with an IC50 value of 2.2 μM (0.975 μg/mL) that can be used in cancer research. Exatecan Intermediate 5 can be used to synthesize Antibody-Drug Conjugates (ADCs).
    Exatecan Intermediate 5
  • HY-17381A
    Idarubicin
    		Inhibitor 99.89%
    Idarubicin is an orally active and potent anthracycline antileukemic agent. Idarubicin inhibits the topoisomerase II interfering with the replication of DNA and RNA transcription. Idarubicin shows induction of DNA damage. Idarubicin inhibits DNA synthesis and of c-myc expression. Idarubicin inhibits the growth of bacteria and yeasts.
    Idarubicin
  • HY-137466
    ARN-21934
    		Inhibitor 98.08%
    ARN-21934 is a potent, highly selective, blood-brain barrier (BBB) penetrant inhibitor for human topoisomerase II α over β. ARN-21934 inhibits DNA relaxation with an IC50 of 2 μM as compared to the anticancer agent Etoposide (IC50=120 μM). ARN-21934 exhibits a favorable in vivo pharmacokinetic profile and is a promising lead compound for anticancer research.
    ARN-21934
  • HY-N6865
    Groenlandicine
    		Agonist 99.87%
    Groenlandicine is a protoberberine alkaloid isolated from Coptidis Rhizoma. Groenlandicine exhibits moderate inhibitory effect with IC50 value of 154.2 μM for human recombinant aldose reductase (HRAR). Groenlandicine selectively induces topoisomerase I-mediated DNA cleavage.
    Groenlandicine
  • HY-N2063
    12-Ethyl-9-hydroxycamptothecin
    		99.89%
    12-Ethyl-9-hydroxycamptothecin is a derivative of Camptothecin. Camptothecin (CPT), a kind of alkaloid, is a DNA topoisomerase I (Topo I) inhibitor with an IC50 of 679 nM.
    12-Ethyl-9-hydroxycamptothecin
  • HY-171580
    Mc-PEG4-Val-Ala-PAB-Exatecan
    		Inhibitor 99.65%
    Mc-PEG4-Val-Ala-PAB-Exatecan is a Drug-linker conjugate for ADC. Mc-PEG4-Val-Ala-PAB-Exatecan contains the ADC linker (Mc-PEG4-Val-Ala-PAB) and a DNA topoisomerase I inhibitor Exatecan (HY-13631).
    Mc-PEG4-Val-Ala-PAB-Exatecan
  • HY-153797
    Dox-btn2
    		Inhibitor
    Dox-btn2 is a biotin labeled Doxorubicin (HY-15142A), with a biotin label at the point of conjugation to doxorubicin at 3'-NH2. Dox-btn2 can be used for cell imaging. While Doxorubicin is mainly accumulated in the nucleus, while Dox-btn2 is mainly located in the cytoplasm.
    Dox-btn2
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity
Topoisomerase Isoform Comparison

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