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.


Anti-infection >
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MC-Gly-Gly-Phe-Gly-(S)-Cyclopropane-Exatecan

MC-Gly-Gly-Phe-Gly-(R)-Cyclopropane-Exatecan is a drug-linker conjugates for ADC, consisting Exatecan (HY-13631). Exatecan is a DNA Topoisomerase I inhibitor (IC50=2.2 μM)[1].

  • CAS Number: 2414254-52-5
  • MF: C55H60FN9O13
  • MW: 1074.12
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Artemisitene

Artemisitene, a natural derivative of Artemisinin, is a Nrf2 activator with antioxidant and anticancer activities. Artemisitene activates Nrf2 by decreasing Nrf2 ubiquitination and increasing its stability[1][2].

  • CAS Number: 101020-89-7
  • MF: C15H20O5
  • MW: 280.32
  • Catalog: Apoptosis
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: 160-162°C (lit.)
  • Flash Point: N/A

Irinotecan HCI Trihydrate

Irinotecan hydrochloride trihydrate is a water soluble topoisomerase I inhibitor with antitumor activity.

  • CAS Number: 136572-09-3
  • MF: C33H45ClN4O9
  • MW: 677.185
  • Catalog: Autophagy
  • Density: N/A
  • Boiling Point: 873.4ºC at 760 mmHg
  • Melting Point: 250-256ºC (dec.)
  • Flash Point: 482ºC

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

DNA topoisomerase II inhibitor 1

DNA topoisomerase II inhibitor 1 (compound 8ed) is a potent DNA topoisomerase II inhibitor. DNA topoisomerase II inhibitor 1 shows anti-proliferative activity. DNA topoisomerase II inhibitor 1 induces apoptosis and cell cycle arrest at sub G1 phase[1].

  • CAS Number: 2459950-15-1
  • MF: C28H24N4O3S
  • MW: 496.58
  • Catalog: Apoptosis
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Irinotecan-d10 (hydrochloride)

Irinotecan-d10 ((+)-Irinotecan-d10) hydrochloride is the deuterium labeled Irinotecan. Irinotecan ((+)-Irinotecan) is a topoisomerase I inhibitor, preventing religation of the DNA strand by binding to topoisomerase I-DNA complex[1][2].

  • CAS Number: 718612-62-5
  • MF: C33H29D10ClN4O6
  • MW: 633.201
  • Catalog: Autophagy
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

isodiospyrin

Isodiospyrin, a natural dimeric naphthoquinone, is a human DNA topoisomerase I (Topoisomerase) inhibitor. Isodiospyrin can prevent both DNA relaxation and kinase activities of human topoisomerase I. Isodiospyrin shows anticancer, antibacterial and antifungal activities[1][2][3].

  • CAS Number: 20175-84-2
  • MF: C22H14O6
  • MW: 374.343
  • Catalog: Bacterial
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 712.0±60.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 398.3±29.4 °C

T-2513

T-2513 is a selective topoisomerase I inhibitor. T-2513 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: 288247-87-0
  • MF: C25H27N3O5
  • MW: 449.49900
  • Catalog: DNA/RNA Synthesis
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

4-(2,4-Dichlorophenyl)-1,4-dihydro-[1,3,5]triazino[1,2-a]benzimidazol-2-amine

Topoisomerase II inhibitor 14 (compound 2f) is a potent inhibtor of Topoisomerase II, with anticancer activity. Topoisomerase II inhibitor 14 induces apoptosis, and arrests cell cycle at S phase. Topoisomerase II inhibitor 14 exhibits antioxidant effect and decreases the level of GSH, MDA, and NO[1].

  • CAS Number: 305343-00-4
  • MF: C15H11Cl2N5
  • MW: 332.19
  • Catalog: Apoptosis
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 493.6±55.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 252.3±31.5 °C

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

Anticancer agent 76

Anticancer agent 76 (Compound CT2-3) is an anticancer agent. Anticancer agent 76 significantly inhibits the proliferation of human NSCLC cells, induces cell cycle arrest, causes ROS generation and induces cell apoptosis[1].

  • CAS Number: 2448091-11-8
  • MF: C32H33NO5S
  • MW: 543.67
  • Catalog: Apoptosis
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

CP-67015

CP-67015, a nalidixic acid analog, is a potent topoisomerase II inhibitor. CP-67015 is a positive direct-acting mutagen in mammalian cells with both gene and chromosomal level effects[1].

  • CAS Number: 100325-51-7
  • MF: C17H12F2N2O3
  • MW: 330.28600
  • Catalog: Topoisomerase
  • Density: 1.424g/cm3
  • Boiling Point: 496.7ºC at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 254.2ºC

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

Guajadial C

Guajadial C is a Top1 catalytic inhibitor that delays Top1 poison-mediated DNA damage. Guajadial C shows cytotoxicity against cancer cells[1].

  • CAS Number: 1529775-02-7
  • MF: C30H34O5
  • MW: 474.588
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Topoisomerase II inhibitor 10

Topoisomerase II inhibitor 10 (compound 32a) is a potent topoisomerase II inhibitor with an IC50 value of 7.45 μM. Topoisomerase II inhibitor 10 causes cell cycle arrest at G2-M phase and induces apoptosis of HepG-2 cells. Topoisomerase II inhibitor 10 has excellent anti-proliferative activities against HepG-2, MCF-7, and HCT-116 cells[1].

  • CAS Number: 2488208-96-2
  • MF: C27H20N6O7S
  • MW: 572.55
  • Catalog: Apoptosis
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Lycobetaine(Ungeremine)

Ungeremine, a phenanthridine type alkaloid, is extracted of the bulbs of Pancratium Illyricum. Ungeremine effectively targets mammalian as well as bacterial type I and type II topoisomerases. Ungeremine displays cytotoxic activity towards the 9 cancer cell lines, including drug-sensitive and MDR phenotypes. Ungeremine induced ferroptosis, necroptosis, autophagy as well as apoptosis mediated by caspase activation, MMP alteration and increase ROS production[1][2].

  • CAS Number: 2121-12-2
  • MF: C16H12NO3
  • MW: 266.27100
  • Catalog: Caspase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: 270-272ºC (dec.)
  • Flash Point: N/A

MC-Gly-Gly-Phe-Gly-(R)-Cyclopropane-Exatecan

MC-Gly-Gly-Phe-Gly-(R)-Cyclopropane-Exatecan is a drug-linker conjugates for ADC, consisting Exatecan (HY-13631). Exatecan is a DNA Topoisomerase I inhibitor (IC50=2.2 μM)[1].

  • CAS Number: 2414254-51-4
  • MF: C55H60FN9O13
  • MW: 1074.12
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Indimitecan

Indimitecan (LMP776) is a topoisomerase I (Top1) inhibitor with anticancer activities[1].

  • CAS Number: 915360-05-3
  • MF: C25H21N3O6
  • MW: 459.45100
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

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

Ciprofloxacin Lactate Soluble

Ciprofloxacin (Bay-09867) lactate is a potent, orally active topoisomerase IV inhibitor. Ciprofloxacin lactate induces mitochondrial DNA and nuclear DNA damage and lead to mitochondrial dysfunction, ROS production. Ciprofloxacin lactate has anti-proliferative activity and induces apoptosis. Ciprofloxacin lactate is a fluoroquinolone antibiotic, exhibiting potent antibacterial activity[1][2][3][4].

  • CAS Number: 97867-33-9
  • MF: C20H24FN3O6
  • MW: 403.404
  • Catalog: Bacterial
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 656.4±55.0 °C at 760 mmHg
  • Melting Point: 255-257ºC
  • Flash Point: 350.8±31.5 °C

Topoisomerase II inhibitor 15

Topoisomerase II inhibitor 15 (compound 2g) is a Topoisomerase II inhibitor. Topoisomerase II inhibitor 15 potently is an apoptotic inducer with greater selectivity against head and neck tumors[1].

  • CAS Number: 451516-79-3
  • MF: C15H11Cl2N5
  • MW: 332.19
  • Catalog: Apoptosis
  • 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

Ganoderic acid X

Ganoderic acid X is a lanostanoid triterpene that can be extracted from Ganoderma amboinense. Ganoderic acid X inhibits topoisomerases and induces Apoptosis of cancer cells[1].

  • CAS Number: 86377-53-9
  • MF: C32H48O5
  • MW: 512.721
  • Catalog: Apoptosis
  • Density: 1.1±0.1 g/cm3
  • Boiling Point: 625.5±55.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 193.1±25.0 °C

Topoisomerase IIα-IN-1

Topoisomerase IIα-IN-1 (compound 2) is a potent DNA-binding ligands and topoisomerase IIα inhibitor. Topoisomerase IIα-IN-1 exhibits high antiproliferative activity against human cancer cell lines[1].

  • CAS Number: 2407521-87-1
  • MF: C22H20N4O5
  • MW: 420.42
  • Catalog: Topoisomerase
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Nalidixic acid sodium salt

Nalidixic acid sodium salt, a quinolone antibiotic, is effective against both gram-positive and gram-negative bacteria. Nalidixic acid acts in a bacteriostatic manner in lower concentrations and is bactericidal in higher concentrations. Nalidixic acid inhibits a subunit of DNA gyrase and topoisomerase IV and reversibly blocks DNA replication in susceptible bacteria[1][2].

  • CAS Number: 3374-05-8
  • MF: C12H11N2NaO3
  • MW: 254.21700
  • Catalog: Bacterial
  • Density: 1.331g/cm3
  • Boiling Point: 413.1ºC at 760mmHg
  • Melting Point: 229-230ºC
  • Flash Point: 203.6ºC

VXc-486

VXc-486 is a gyrase B inhibitor, with bactericidal activity. VXc-486 potently inhibits multiple drug-sensitive isolates and drug-resistant isolates of Mycobacterium tuberculosis, with MICs of 0.03 to 0.30 μg/ml and 0.08 to 5.48 μg/ml, respectively[1].

  • CAS Number: 1384984-18-2
  • MF: C21H25FN6O3
  • MW: 428.460
  • Catalog: Bacterial
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Heliquinomycin

Heliquinomycin is an inhibitor of DNA helicase (Ki: 6.8 μM) and inhibits DNA and RNA synthesis. Heliquinomycin is effective against Gram-positive bacteria strains. Heliquinomycin inhibits cancer cell growth[1][2].

  • CAS Number: 178182-49-5
  • MF: C33H30O17
  • MW: 698.58100
  • Catalog: Bacterial
  • Density: 1.72g/cm3
  • Boiling Point: 966ºC at 760mmHg
  • Melting Point: N/A
  • Flash Point: 310.6ºC