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
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Topoisomerase Degraders
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Topoisomerase Controls
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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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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).
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RPR121056-d3
0 ImagesCat. No.: HY-132561SCAS No.: 1217816-76-6Synonyms: APC-d3RPR121056-d3 is the deuterium labeled RPR121056. RPR121056 is a metabolite of Irinotecan (HY-16562), 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 study of colorectal cancer. Irinotecan also directly inhibits AChE.
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9-Hydroxyellipticine hydrochloride (Standard)
0 ImagesCat. No.: HY-101775ARCAS No.: 52238-35-49-Hydroxyellipticine (hydrochloride) (Standard) is the analytical standard of 9-Hydroxyellipticine (hydrochloride). This product is intended for research and analytical applications. 9-Hydroxyellipticine hydrochloride is a inhibitor of Topo II and RyR. 9-Hydroxyellipticine hydrochloride exhibits antitumor, antioxidant and catecholamine-releasing activities. 9-Hydroxyellipticine hydrochloride exhibits IC50 values of 1.6 μM and 1.2μM in Hela S-3 and 293T cells, respectively.
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Ellipticine hydrochloride (Standard)
0 ImagesSynonyms: NSC 71795 hydrochloride (Standard)Ellipticine (hydrochloride) (Standard) is the analytical standard of Ellipticine (hydrochloride). This product is intended for research and analytical applications. Ellipticine (NSC 71795) hydrochloride is a potent antineoplastic agent; inhibits DNA topoisomerase II activities.
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Topoisomerase I inhibitor 9
0 ImagesCat. No.: HY-156462CAS No.: 1228150-86-4Topoisomerase I inhibitor 9 (compound 3d) is a leishmanial topoisomerase IB inhibitor. Topoisomerase I inhibitor 9 has antileishmanial activity against L. donovani promastigotes, with the IC50 of 34.81μM.
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Alternariol-d2
0 ImagesCat. No.: HY-W653896CAS No.: 2469262-26-6Alternariol-d2 is deuterium labeled Alternariol. Alternariol is an orally ingested mycotoxin produced by Alternaria, capable of inhibiting the activity of topoisomerase I and II (topoisomerase I, topoisomerase II). Alternariol has weak estrogenic (Estrogen Receptor/ERR) and androgen/antiandrogen (Androgen Receptor) effects. Alternariol can induce apoptosis, trigger cell cycle arrest, suppress innate immune responses, and exhibit anti-tumor activity. Alternariol has genotoxic, mutagenic, and endocrine-disrupting effects.
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DS21412020
0 ImagesCat. No.: HY-113718CAS No.: 1037366-37-2DS21412020 is a fluoroquinolone antibacterial agent. DS21412020 inhibits bacterial DNA gyrase (GyrA) and topoisomerase IV, leading to DNA breaks. DS21412020 exhibits significant activity against Gram-positive bacteria such as Staphylococcus aureus (MIC = 0.006 μg/mL), Streptococcus pneumoniae (MIC = 0.05 μg/mL), and Methicillin (HY-121544)-resistant Staphylococcus aureus (MIC = 0.2 μg/mL), and Gram-negative bacteria such as Escherichia coli (MIC = 0.006 μg/mL) and Pseudomonas aeruginosa (MIC = 0.78 μg/mL). DS21412020 significantly reduces bacterial load in mouse pneumonia and MRSA infection models. DS21412020 can be used in the development of next-generation quinolone antibiotics.
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Asulacrine isethionate
0 ImagesCat. No.: HY-13552CAS No.: 80841-48-1Synonyms: CI-921 isethionate; NSC 343499 isethionateAsulacrine isethionate (CI-921 isethionate) is a derivative of Amsacrine (HY-13551), a Topoisomerase II inhibitor and an anticancer agent. Asulacrine isethionate binds to DNA via intercalation, forming stable complexes with long residence times at DNA sites. Asulacrine isethionate mediates DNA breakage and DNA-protein cross-linking. Asulacrine isethionate exhibits anticancer activity against leukemia or lung cancer. Asulacrine isethionate can be used in research related to breast cancer, lung cancer, mouse solid tumors and leukemia.
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Berberine
0 ImagesBerberine (Natural Yellow 18) is an alkaloid isolated from the Chinese herbal medicine Huanglian, as an antibiotic. Berberine (Natural Yellow 18) induces reactive oxygen species (ROS) generation and inhibits DNA topoisomerase. Berberine (Natural Yellow 18) has antineoplastic properties. The sulfate form (HY-N0716B) improves bioavailability.
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Amonafide (Standard)
0 ImagesSynonyms: AS1413 (Standard)Amonafide (Standard) is the analytical standard of Amonafide. This product is intended for research and analytical applications. Amonafide is a topoisomerase II inhibitor and DNA intercalator that induces apoptotic signaling by blocking the binding of Topo II to DNA.
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Luotonin F
0 ImagesCat. No.: HY-118726CAS No.: 244616-85-1Luotonin F is an alkaloid found in the aerial parts of the P. nigellastrum Bunge. Luotonin F shows cytotoxic activity against mouse leukemia P-388 cells by inhibiting human topoisomerase II.
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NU/ICRF 500
0 ImagesCat. No.: HY-118379CAS No.: 156074-08-7NU/ICRF 500 is a topo II catalytic inhibitor which increases CREST negative micronuclei in human lymphocytes.
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Mitoxantrone (Standard)
0 ImagesSynonyms: Mitozantrone (Standard); NSC 301739 (Standard)Mitoxantrone (Standard) is the analytical standard of Mitoxantrone. This product is intended for research and analytical applications. Mitoxantrone is a potent topoisomerase II inhibitor. Mitoxantrone also inhibits protein kinase C (PKC) activity with an IC50 of 8.5 μM. Mitoxantrone induces apoptosis of B-CLL (B-chronic lymphocytic leukaemia) cells. Mitoxantrone shows antitumor activity. Mitoxantrone also has anti-orthopoxvirus activity with EC50s of 0.25 μM and and 0.8 μM for cowpox and monkeypox, respectively.
