Topoisomerase
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
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Topoisomerase Inhibitors
(761)
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Topoisomerase Agonists
(2)
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Topoisomerase Modulator
(1)
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Topoisomerase Inducer
(1)
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Topoisomerase Degraders
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Topoisomerase Controls
(3)
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Topoisomerase Ligands
(2)
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Topoisomerase Proteins
(1)
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DNA topoisomerase II Proteins
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Topoisomerase Related Products (838)
Related Products (838)
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Recombinant Proteins (1)
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Antibodies (4)
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Topoisomerase Isoform Comparison
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Bisantrene dihydrochloride (Standard)
0 ImagesSynonyms: CL-216942 dihydrochloride (Standard)Bisantrene (dihydrochloride) (Standard) is the analytical standard of Bisantrene (dihydrochloride) (HY-100875A). This product is intended for research and analytical applications. Bisantrene dihydrochloride is a highly effective antitumor agent, it exerts its cytotoxicity by affecting DNA intercalation. Bisantrene dihydrochloride targets eukaryotic type II topoisomerases. Bisantrene dihydrochloride is a substrate of MDR1.
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Banoxantrone dihydrochloride (Standard)
0 ImagesSynonyms: AQ4N dihydrochloride (Standard)Banoxantrone (dihydrochloride) (Standard) is the analytical standard of Banoxantrone (dihydrochloride). This product is intended for research and analytical applications. Banoxantrone dihydrochloride is a novel bioreductive agent that can be reduced to a stable, DNA-affinic compound AQ4, which is a potent topoisomerase II inhibitor.
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Exatecan mesylate (Standard)
0 ImagesCat. No.: HY-13631ARCAS No.: 169869-90-3Synonyms: DX8951f (Standard)Exatecan mesylate (Standard) is the analytical standard of Exatecan mesylate (HY-13631A). This product is intended for research and analytical applications. Exatecan mesylate (DX8951f) is a DNA topoisomerase I inhibitor, with an IC50 of 2.2 μM (0.975 μg/mL). Exatecan mesylate can be used in cancer research.
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Topotecan hydrochloride (Standard)
0 ImagesSynonyms: SKF 104864A hydrochloride (Standard); NSC 609669 hydrochloride (Standard)Topotecan (hydrochloride) (Standard) is the analytical standard of Topotecan (hydrochloride). This product is intended for research and analytical applications. Topotecan Hydrochloride (SKF 104864A Hydrochloride) is a Topoisomerase I inhibitor with potent antineoplastic activities.
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Anti-Trypanosoma cruzi agent-9
0 ImagesCat. No.: HY-185309CAS No.: 3094993-05-9Anti-Trypanosoma cruzi agent-9 is a topoisomerase II inhibitor. Anti-Trypanosoma cruzi agent-9 inhibits the growth of Trypanosoma cruzi and Leishmania donovani.
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ICRF 192
0 ImagesCat. No.: HY-183524CAS No.: 58893-33-7ICRF 192 is a weak DNA topoisomerase II (DNA topoisomerase II) inhibitor with an IC50 of 91 μM. ICRF 192 forms an iron-chelating derivative via ring-opening hydrolysis, which can displace Fe3+ from the Fe3+-doxorubicin complex. ICRF 192 is used for studies on the structure-activity relationship of bisdioxopiperazines and the cardiotoxicity of anthracycline drugs.
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DACA (Standard)
0 ImagesCat. No.: HY-100777RCAS No.: 89459-25-6DACA (Standard) is the analytical standard of DACA (HY-100777). This product is intended for research and analytical applications. DACA (XR 5000) is a blood-brain barrier-penetrating topoisomerase I and II inhibitor. DACA can be used in the research of colorectal cancer, leukemia and lung cancer.
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Topoisomerase I-IN-22
0 ImagesCat. No.: HY-182816CAS No.: 3080330-34-0Topoisomerase I-IN-22 is an inhibitor of MRSA DNA Topoisomerase I with an IC50 of 0.85 μg/mL. Topoisomerase I-IN-22 can specifically disrupt the cell membrane structure of MRSA, enter the interior of bacteria and inhibit the activity of DNA Topoisomerase I, thereby interfering with the processes of DNA replication and transcription. Topoisomerase I-IN-22 can be used for the research of MRSA infection.
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(S)-Gyramide A
0 ImagesCat. No.: HY-116231CAS No.: 1000592-48-2(S)-Gyramide A is a weak inhibitor of cell proliferation that can target DNA gyrase.
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Bisantrene (Standard)
0 ImagesSynonyms: CL216942 (Standard)Bisantrene (Standard) is the analytical standard of Bisantrene. This product is intended for research and analytical applications. Bisantrene is a highly effective antitumor agent, it exerts its cytotoxicity by affecting DNA intercalation. Bisantrene targets eukaryotic type II topoisomerases. Bisantrene is a substrate of MDR1.
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DNA gyrase/Topo IV-IN-1
0 ImagesCat. No.: HY-170567CAS No.: 3087956-87-1DNA gyrase/Topo IV-IN-1 (Compound 27) is an inhibitor of DNA gyrase and topoisomerase IV, exhibiting antibacterial activity. For Escherichia coli and methicillin-resistant Staphylococcus aureus DNA gyrases, DNA gyrase/Topo IV-IN-1 has an IC50 of 11 and 17 nM respectively, and for topoisomerase IV of Escherichia coli and methicillin-resistant Staphylococcus aureus, the IC50 values are 83 and 21 nM respectively. DNA gyrase/Topo IV-IN-1 can be used for research in the field of anti-infection.
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β-Lapachone (Standard)
0 ImagesSynonyms: ARQ-501 (Standard); NSC-26326 (Standard)β-Lapachone (Standard) is the analytical standard of β-Lapachone. This product is intended for research and analytical applications. β-Lapachone (ARQ-501;NSC-26326) is a naturally occurring O-naphthoquinone, acts as a topoisomerase I inhibitor, and induces apoptosis by inhibiting cell cycle progression.
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Daunorubicin-13C,d3
0 ImagesCat. No.: HY-W654130Synonyms: Daunomycin-13C,d3; RP 13057-13C,d3; Rubidomycin-13C,d3Daunorubicin-13C,d3 is 13C and deuterium labeled Daunorubicin. Daunorubicin (Daunomycin) is a topoisomerase II inhibitor with potent anti-tumor activity. Daunorubicin inhibits DNA and RNA synthesis. Daunorubicin is a cytotoxin that inhibits cancer cell viability and induces apoptosis and necrosis. Daunorubicin is also an anthracycline antibiotic. Daunorubicin can be used in the research of infection and variety of cancers, including leukemia, non-Hodgkin lymphomas, Ewing's sarcoma, Wilms' tumor.
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(1S,2R,7S)-Sitafloxacin
0 ImagesCat. No.: HY-B0395ECAS No.: 127254-11-9Synonyms: (1S,2R,7S)-DU-6859a; DU-6856(1S,2R,7S)-Sitafloxacin (DU-6856) is an enantiomer of Sitafloxacin (HY-B0395). (1S,2R,7S)-Sitafloxacin is a topoisomerase inhibitor. (1S,2R,7S)-Sitafloxacin is an antibiotic. (1S,2R,7S)-Sitafloxacin has inhibitory activity against Escherichia coli DNA gyrase (IC50 0.18 μg/mL) and Staphylococcus aureus topoisomerase IV. (1S,2R,7S)-Sitafloxacin has antibacterial activity and can be used in the study of various bacterial infections.
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Alizarin 2-methyl ether
0 ImagesAlizarin 2-methyl ether is a DNA topoisomerase inhibitor. Alizarin 2-methyl ether inhibits the relaxation of supercoiled DNA via DNA topoisomerase I and II. Alizarin 2-methyl ether promotes adipocyte differentiation by increasing lipid accumulation. Alizarin 2-methyl ether possesses antidiabetic and insulin-sensitizing properties. Alizarin 2-methyl ether can be used in research related to human colon cancer, P-388 lymphocytic leukemia and diabetes.
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Makaluvamine A
0 ImagesCat. No.: HY-125580CAS No.: 146555-78-4Makaluvamine A is a member of Makaluvamines. Makaluvamines can be isolated from Fijian sponges of the genus Zyzzya, and possess inhibitory activity toward topoisomerase II along with cytotoxic activity against HCT-116 human colon cancer cells.
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Mitoxantrone-d8 hydrochloride
0 ImagesCat. No.: HY-13502AS1Synonyms: Mitozantrone-d8 hydrochloride; NSC 301739-d8 hydrochlorideMitoxantrone-d8 (hydrochloride) (Mitozantrone-d8 (hydrochloride)) is deuterium labeled Mitoxantrone (dihydrochloride). Mitoxantrone dihydrochloride is a potent topoisomerase II inhibitor. Mitoxantrone dihydrochloride also inhibits protein kinase C (PKC) activity with an IC50 of 8.5 μM. Mitoxantrone dihydrochloride induces apoptosis of B-CLL (B-chronic lymphocytic leukaemia) cells. Mitoxantrone dihydrochloride shows antitumor activity. Mitoxantrone dihydrochloride also has anti-orthopoxvirus activity with EC50s of 0.25 μM and and 0.8 μM for cowpox and monkeypox, respectively.
