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
(765)
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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
(3)
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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
(1)
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Topoisomerase Related Products (842)
Related Products (842)
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Recombinant Proteins (1)
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Antibodies (4)
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Topoisomerase Isoform Comparison
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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.
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Daunorubicin hydrochloride (Standard)
0 ImagesSynonyms: Daunomycin hydrochloride (Standard); RP 13057 hydrochloride (Standard); Rubidomycin hydrochloride (Standard)Daunorubicin (hydrochloride) (Standard) is the analytical standard of Daunorubicin (hydrochloride). This product is intended for research and analytical applications. Daunorubicin (Daunomycin) hydrochloride is a topoisomerase II inhibitor with potent anti-tumor activity. Daunorubicin hydrochloride inhibits DNA and RNA synthesis. Daunorubicin hydrochloride is a cytotoxin that inhibits cancer cell viability and induces apoptosis and necrosis. Daunorubicin hydrochloride is also an anthracycline antibiotic. Daunorubicin hydrochloride 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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DNA gyrase/Topo IV-IN-2
0 ImagesCat. No.: HY-175539DNA gyrase/Topo IV-IN-2 (Compound AK19) is an antibacterial agent with IC50 values of 0.783 μM and 7.136 μM against E. coli DNA gyrase and topoisomerase IV, respectively. DNA gyrase/Topo IV-IN-2 exhibits broad-spectrum antibacterial efficacy against both Gram-positive and Gram-negative pathogens. DNA gyrase/Topo IV-IN-2 can inhibit the biofilms of B. subtilis and MRSA, with an MIC of 1.9 μM against both B. subtilis and MRSA. DNA gyrase/Topo IV-IN-2 can be used in research related to anti-drug-resistant bacterial drugs.
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Ethonafide
0 ImagesCat. No.: HY-117543CAS No.: 160554-87-0Synonyms: AMP-53; 6-EthoxyazonafideEthonafide (AMP-53) is an anthracene-containing derivative of Amonafide that belongs to the Azonafide series of anticancer agents. Ethonafide (AMP-53) inhibits topoisomerase II activity by stabilizing the enzyme-DNA complex, involving both topoisomerase IIα and β.
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Gepotidacin mesylate hydrate (Standard)
0 ImagesNiacin (Standard) is the analytical standard of Niacin. This product is intended for research and analytical applications. Niacin (Vitamin B3) is an orally active water-soluble B3 vitamin that is an essential nutrient for humans. Niacin (Vitamin B3) plays a key role in energy metabolism, cell signaling cascades regulating gene expression and apoptosis. Niacin (Vitamin B3) is also used in the study of cardiovascular diseases.
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Lomefloxacin hydrochloride (Standard)
0 ImagesSynonyms: SC47111A hydrochloride (Standard); NY-198 hydrochloride (Standard)Lomefloxacin (hydrochloride) (Standard) is the analytical standard of Lomefloxacin hydrochloride (HY-B0455). This product is intended for research and analytical applications. Lomefloxacin hydrochloride (NY-198 hydrochloride) is an orally active difluoroquinolone antibiotic. Lomefloxacin hydrochloride prevents DNA supercoiling and replication by inhibiting bacterial topoisomerase II. Lomefloxacin hydrochloride induces ROS production and Apoptosis. Lomefloxacin hydrochloride has broad-spectrum bactericidal activity against Gram-positive and Gram-negative bacteria. Lomefloxacin hydrochloride has anticancer effects against melanoma. Lomefloxacin hydrochloride can be used in the study of systemic bacterial infections (such as Salmonella typhimurium infections), skin and melanoma .
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Ellipticine (Standard)
0 ImagesEllipticine (Standard) is the analytical standard of Ellipticine. This product is intended for research and analytical applications. Ellipticine (NSC 71795) is a potent antineoplastic agent; inhibits DNA topoisomerase II activities.
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Topoisomerase IV-IN-3
0 ImagesCat. No.: HY-181820Topoisomerase IV-IN-3 is a Staphylococcus aureus Topoisomerase IV inhibitor, DNA gyrase inhibitor and antibacterial agent. Topoisomerase IV-IN-3 has IC50 values of 1.32 μM and 0.48 μM against topoisomerase IV, and 0.88 μM and 0.54 μM against DNA gyrase. Topoisomerase IV-IN-3 inhibits decatenation, ATPase, and supercoiling activities of its target enzymes. Topoisomerase IV-IN-3 exerts antibacterial activity against Gram-positive and Gram-negative bacterial strains. Topoisomerase IV-IN-3 exhibits low cytotoxicity toward human fibroblast cells. Topoisomerase IV-IN-3 can be used for the research of bacterial infections.
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Intoplicine dimesylate (Standard)
0 ImagesCat. No.: HY-101647ARCAS No.: 133711-99-6Synonyms: RP 60475 dimesylate (Standard)Intoplicine (dimesylate) (Standard) is the analytical standard of Intoplicine (dimesylate) (HY-101647A). This product is intended for research and analytical applications. Intoplicine (RP 60475) dimesylate, an antitumor derivative in the 7H-benzo[e]pyrido[4,3-b]indole series, is a DNA topoisomerase I and II inhibitor. Intoplicine dimesylate strongly binds DNA (KA = 2 x 105 /M) and thereby increases the length of linear DNA.
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Idarubicin hydrochloride (Standard)
0 ImagesCat. No.: HY-17381RCAS No.: 57852-57-0Synonyms: 4-Demethoxydaunorubicin hydrochloride (Standard)Idarubicin (hydrochloride) (Standard) is the analytical standard of Idarubicin (hydrochloride). This product is intended for research and analytical applications. Idarubicin hydrochloride is an anthracycline antileukemic agent. It inhibits the topoisomerase II interfering with the replication of DNA and RNA transcription. Idarubicin hydrochloride inhibits the growth of bacteria and yeasts.
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Mitoxantrone dihydrochloride (Standard)
0 ImagesSynonyms: Mitozantrone dihydrochloride (Standard); NSC 301739 dihydrochloride (Standard)Mitoxantrone (dihydrochloride) (Standard) is the analytical standard of Mitoxantrone (dihydrochloride). This product is intended for research and analytical applications. 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.
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PluriSIn #2 (Standard)
0 ImagesCat. No.: HY-111630RCAS No.: 56563-17-8PluriSIn #2 (Standard) is the analytical standard of PluriSIn #2 (HY-111630). This product is intended for research and analytical applications. PluriSIn #2 is a selective transcriptional inhibitor of topoisomerase II α (TOP2A). PluriSIn #2 is a compound that selectively eliminates undifferentiated human pluripotent stem cells (hPSCs).
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Retelliptine
0 ImagesCat. No.: HY-106307CAS No.: 72238-02-9Synonyms: BD84Retelliptine (BD84), a derivative of ellipticine, is an inhibitor of Topoisomerase II with anticancer activity. Retelliptine can bind to DNA and inhibit Topoisomerase II during DNA replication.
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Gatifloxacin (Standard)
0 ImagesSynonyms: AM-1155 (Standard); BMS-206584 (Standard); PD135432 (Standard)Gatifloxacin (Standard) is the analytical standard of Gatifloxacin. This product is intended for research and analytical applications. Gatifloxacin (AM-1155; BMS-206584; PD135432) is a potent fluoroquinolone antibiotic with broad-spectrum antibacterial activity. Gatifloxacin inhibits bacterial type II topoisomerases (IC50=13.8 μg/ml for S. aureus topoisomerase IV) and E. coli DNA gyrase (IC50=0.109 μg/ml). Gatifloxacin can be used to treat bacterial conjunctivitis in vivo.
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Simmitecan
0 ImagesCat. No.: HY-107133ACAS No.: 951290-31-6Simmitecan is a potent topoisomerase I (TOP1) inhibitor, which is a 9-substituted lipophilic camptothecin (Camptothecin (HY-16560)) derivative. Simmitecan blocks DNA replication and transcription, thereby inducing tumor cell apoptosis by inhibiting the activity of TOP1. Simmitecan can be used in the research of cancers such as liver cancer.
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Trovafloxacin (Standard)
0 ImagesCat. No.: HY-A0170RCAS No.: 147059-72-1Trovafloxacin (Standard) is the analytical standard of Trovafloxacin. This product is intended for research and analytical applications. Trovafloxacin is a broad-spectrum quinolone antibiotic with potent activity against Gram-positive, Gram-negative and anaerobic organisms. Trovafloxacin blocks the DNA gyrase and topoisomerase IV activity. Trovafloxacin is also a potent, selective and orally active pannexin 1 channel (PANX1) inhibitor with an IC50 of 4 μM for PANX1 inward current. Trovafloxacin does not inhibit connexin 43 gap junction or PANX2. Trovafloxacin leads to dysregulated fragmentation of apoptotic cells by inhibiting PANX1.
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10-Boc-SN-38
0 ImagesCat. No.: HY-164271CAS No.: 362497-15-210-Boc-SN-38 is a tert-butyloxycarbonyl (Boc)-protected form of SN-38 (HY-13704). SN-38 is the active metabolite of Irinotecan (HY-16562).
