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.


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Daunorubicin citrate

Daunorubicin (Daunomycin) citrate is a topoisomerase II inhibitor with potent anti-tumor activity. Daunorubicin citrate inhibits DNA and RNA synthesis. Daunorubicin citrate is a cytotoxin that inhibits cancer cell viability and induces apoptosis and necrosis. Daunorubicin citrate is also an anthracycline antibiotic. Daunorubicin citrate can be used in the research of infection and variety of cancers, including leukemia, non-Hodgkin lymphomas, Ewing's sarcoma, Wilms' tumor[1][2][4][5].

  • CAS Number: 1884557-85-0
  • MF: C33H37NO17
  • MW: 719.64
  • Catalog: Bacterial
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Groenlandicine

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)[1]. Groenlandicine selectively induces topoisomerase I-mediated DNA cleavage[2].

  • CAS Number: 38691-95-1
  • MF: C19H16NO4+
  • MW: 321.32700
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Topotecan hydrochloride

Topotecan Hydrochloride (SKF 104864A; NSC 609669) is a Topoisomerase I inhibitor with potent antineoplastic activities.

  • CAS Number: 119413-54-6
  • MF: C23H24ClN3O5
  • MW: 421.446
  • Catalog: Autophagy
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 782.9±60.0 °C at 760 mmHg
  • Melting Point: 213-218ºC
  • Flash Point: 427.3±32.9 °C

LMP744 hydrochloride

LMP744 hydrochloride (MJ-III65 hydrochloride) is a DNA intercalator and Topoisomerase (Top1) inhibitor with antitumor activity[1].

  • CAS Number: 308246-57-3
  • MF: C24H25ClN2O7
  • MW: 488.91800
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Topoisomerase II inhibitor 4

Topoisomerase II inhibitor 4 (compound E17) is a potent Topoisomerase II inhibitor. Topoisomerase II inhibitor 4 triggers G2/M cell cycle arrest and shows anti-tumor activity with strong cytotoxic and anti-proliferative effect[1].

  • CAS Number: 2560590-49-8
  • MF: C25H25N5O4
  • MW: 459.50
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

XR-11576 HCl

XR-11576 HCl is a novel orally active dual topoisomerase I and II inhibitor with antitumor activity.

  • CAS Number: 346689-77-8
  • MF: C23H25ClN4O2
  • MW: 424.92
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

PNU-159682

PNU-159682, a highly potent metabolite of the anthracycline nemorubicin with outstanding cytotoxicity, is a potent ADCs cytotoxin.

  • CAS Number: 202350-68-3
  • MF: C32H35NO13
  • MW: 641.619
  • Catalog: ADC Cytotoxin
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 838.5±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 460.9±34.3 °C

Topoisomerase I inhibitor 8

Topoisomerase I inhibitor 8 is a potent topoisomerase I inhibitor. Topoisomerase I inhibitor 8 is a hexacyclic analogue of camptothecin, and displays cytotoxic effect against tumor cells[1].

  • CAS Number: 210346-40-0
  • MF: C24H21FN2O4
  • MW: 420.43
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

T-2513 hydrochloride

T-2513 hydrochloride is a selective topoisomerase I inhibitor. T-2513 hydrochloride binds covalently to and stabilizes the topoisomerase I-DNA complex and inhibits DNA replication and RNA synthesis, ultimately leading to cell death[1].

  • CAS Number: 187793-52-8
  • MF: C25H28ClN3O5
  • MW: 485.96
  • Catalog: DNA/RNA Synthesis
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

AQ4

AQ4 is a topoisomerase II inhibitor and DNA intercalator as a chemically stable cytotoxic agent in many human tumor lines[1].

  • CAS Number: 70476-63-0
  • MF: C22H28N4O4
  • MW: 412.48200
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

garenoxacin mesylate

Garenoxacin (BMS 284756) mesylate is an orally active quinolone antibiotic and Garenoxacin mesylate has a broad spectrum of activity against a wide array of gram-positive and gram-negative bacteria, anaerobes. Garenoxacin mesylate also inhibits Gyrase and TOPO IV[1][2][3][4].

  • CAS Number: 223652-82-2
  • MF: C24H24F2N2O7S
  • MW: 522.52
  • Catalog: Bacterial
  • Density: 1.421g/cm3
  • Boiling Point: 581.5ºC at 760mmHg
  • Melting Point: N/A
  • Flash Point: 305.5ºC

Zorubicin

Zorubicin (Rubidazon) is a derivative of Daunorubicin (HY-13062A). Zorubicin interacts with topoisomerase II and inhibits DNA polymerases. Zorubicin can be used for the research of acute leukemias and sarcomas[1][2][3][4][5].

  • CAS Number: 54083-22-6
  • MF: C34H35N3O10
  • MW: 645.65600
  • Catalog: DNA/RNA Synthesis
  • Density: 1.54g/cm3
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Seconeolitsine

Seconeolitsine, an antibiotic, and is an inhibitor of targeting topoisomerase I (TopA). Seconeolitsine also is a new antimicrobial agent that can inhibit S. pneumoniae growth. Seconeolitsine can inhibit TopA relaxation activity with an IC50 value of 17 μM. Seconeolitsine can be used for the research of S. pneumoniae infections resistant to other antibiotics[1].

  • CAS Number: 2650074-56-7
  • MF: C19H17NO4
  • MW: 323.34
  • Catalog: Bacterial
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

NH2-bicyclo[1.1.1]pentane-7-MAD-MDCPT

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[1].

  • CAS Number: 2857037-69-3
  • MF: C26H23N3O6
  • MW: 473.48
  • Catalog: ADC Cytotoxin
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Sabarubicin

Sabarubicin is a doxorubicin disaccharide analogue with striking antitumor activity. Sabarubicin is more effective than doxorubicin as a topoisomerase II poison and stimulated DNA fragmentation at lower intracellular concentrations.

  • CAS Number: 211100-13-9
  • MF: C32H37NO13
  • MW: 643.63500
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Doxorubicin hydrochloride

Doxorubicin is a cytotoxic anthracycline antibiotic for the treatment of multiple cancers. The possible mechanisms by which doxorubicin acts in the cancer cell are intercalation into DNA and disruption of topoisomerase-II-mediated DNA repair.

  • CAS Number: 23214-92-8
  • MF: C27H29NO11
  • MW: 543.52
  • Catalog: Bacterial
  • Density: 1.61 g/cm3
  • Boiling Point: N/A
  • Melting Point: 205ºC
  • Flash Point: 443.8ºC

Trovafloxacin

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[1][2][3].

  • CAS Number: 147059-72-1
  • MF: C20H15F3N4O3
  • MW: 416.35300
  • Catalog: Bacterial
  • Density: 1.612g/cm3
  • Boiling Point: 630.5ºC at 760mmHg
  • Melting Point: 246ºC
  • Flash Point: 335.1ºC

Merbarone

Merbarone (NSC 336628) is an orally active inhibitor of topoisomerase II. Merbarone acts primarily by blocking topoisomerase II-mediated DNA cleavage. Merbarone is an anticancer agent[1][2].

  • CAS Number: 97534-21-9
  • MF: C11H9N3O3S
  • MW: 263.27200
  • Catalog: Topoisomerase
  • Density: 1.51g/cm3
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Exatecan Intermediate 7

Exatecan Intermediate 7 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 7 can be used to synthesize Antibody-Drug Conjugates (ADCs).

  • CAS Number: 182182-32-7
  • MF: C13H13FN2O3
  • MW: 264.25
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Aclarubicin

Aclacinomycin A (Aclarubicin) is an orally active and potent anthracycline antitumor antibiotic. Aclacinomycin A is an inhibitor of topoisomerase I and II. Aclacinomycin A inhibits synthesis of nucleic acid, especially RNA. Aclacinomycin A might inhibit the 26S protease complex as well as the ubiquitin-ATP-dependent proteolysis[1][2][3].

  • CAS Number: 57576-44-0
  • MF: C42H53NO15
  • MW: 811.86800
  • Catalog: DNA/RNA Synthesis
  • Density: 1.42 g/cm3
  • Boiling Point: 897.7ºC at 760 mmHg
  • Melting Point: 151-153ºC
  • Flash Point: 496.7ºC

Topoisomerase IIα-IN-3

Topoisomerase IIα-IN-3 (Compound 12c) is a DNA intercalative topoisomerase-IIα inhibitor. Topoisomerase IIα-IN-3 arrests cell cycle at the G0/G1 phase and induces apoptosis[1].

  • CAS Number: 2538528-11-7
  • MF: C29H20N6O2S
  • MW: 516.57
  • Catalog: Apoptosis
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Berberine hydrogen sulphate

Berberine sulfate is a natural alkaline, reduces apoptosis, with potent anti-oxidative and anti-inflammatory effect[1].

  • CAS Number: 633-66-9
  • MF: C20H19NO8S
  • MW: 433.432
  • Catalog: Bacterial
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Trovafloxacin Mesylate

Trovafloxacin mesylate is a broad-spectrum quinolone antibiotic with potent activity against Gram-positive, Gram-negative and anaerobic organisms. Trovafloxacin mesylate blocks the DNA gyrase and topoisomerase IV activity. Trovafloxacin mesylate is also a potent, selective and orally active pannexin 1 channel (PANX1) inhibitor with an IC50 of 4 μM for PANX1 inward current. Trovafloxacin mesylate does not inhibit connexin 43 gap junction or PANX2. Trovafloxacin mesylate leads to dysregulated fragmentation of apoptotic cells by inhibiting PANX1[1][2][3].

  • CAS Number: 147059-75-4
  • MF: C21H19F3N4O6S
  • MW: 512.45900
  • Catalog: Bacterial
  • Density: N/A
  • Boiling Point: 630.5ºC at 760mmHg
  • Melting Point: >250 °C (dec.)
  • Flash Point: 335.1ºC

NBTIs-IN-6

NBTIs-IN-6 is a bacterial topoisomerase inhibitor with certain antibacterial activity. Among them, the MIC90 for fluoroquinolone-resistant MRSA was 2 μg/mL[1].

  • CAS Number: 2422893-97-6
  • MF: C25H27FN4O6
  • MW: 498.50
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Amrubicin

Amrubicin is a DNA topoisomerase II inhibitor, used for the research of cancer.

  • CAS Number: 110267-81-7
  • MF: C25H25NO9
  • MW: 483.467
  • Catalog: Topoisomerase
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 717.8±60.0 °C at 760 mmHg
  • Melting Point: 172-174ºC
  • Flash Point: 387.9±32.9 °C

3,6-Diamino-9(10H)-acridone

3,6-Diamino-9(10H)-acridone is a topoisomerase inhibitor[1].

  • CAS Number: 42832-87-1
  • MF: C13H11N3O
  • MW: 225.24600
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: >300ºC dec.
  • Flash Point: N/A

DRF-1042

DRF-1042 is an orally active camptothecin analog, which acts to inhibit DNA topoisomerase I. DRF-1042 shows good anticancer activity against a panel of human cancer cell lines[1][2].

  • CAS Number: 200619-13-2
  • MF: C22H20N2O6
  • MW: 408.404
  • Catalog: Topoisomerase
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 844.6±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 464.6±34.3 °C

Idarubicin

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[1][2][3][4][5].

  • CAS Number: 58957-92-9
  • MF: C26H27NO9
  • MW: 497.494
  • Catalog: Bacterial
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 725.4±60.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 392.5±32.9 °C

Topoisomerase I inhibitor 7

Topoisomerase I inhibitor 7 (Compound 8) is a potent inhibitor of Topoisomerase I. Topoisomerase I inhibitor 7 significantly inhibits tumor growth (up to 79%) and increases the lifespan (153%) of mice bearing P388 lymphoma transplants. Topoisomerase I inhibitor 7 indicates prospects for further search of new antitumor drug candidates among the heteroarene-fused anthraquinones[1].

  • CAS Number: 2408639-81-4
  • MF: C22H19N3O5
  • MW: 405.40
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Irinotecan

Irinotecan is a water soluble topoisomerase I inhibitor, preventing religation of the DNA strand by binding to topoisomerase I-DNA complex.

  • CAS Number: 97682-44-5
  • MF: C33H38N4O6
  • MW: 586.678
  • Catalog: Autophagy
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 873.4±65.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 482.0±34.3 °C