1. Signaling Pathways
  2. Cell Cycle/DNA Damage
  3. Topoisomerase

Topoisomerase

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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-13566A
    Belotecan hydrochloride
    Inhibitor 99.88%
    Belotecan hydrochloride (CKD-602 hydrochloride), a Topoisomerase I inhibitor, is a synthetic camptothecin derivative.
    Belotecan hydrochloride
  • HY-13630
    Etoposide phosphate
    Inhibitor
    Etoposide phosphate (BMY-40481) is a potent anti-cancer chemotherapy agent and a selective topoisomerase II inhibitor to prevent re-ligation of DNA strands. Etoposide phosphate is the phosphate ester proagent of etoposide and is considered as active equivalent to Etoposide. Etoposide phosphate induces cell cycle arrest, apoptosis, and autophagy.
    Etoposide phosphate
  • HY-153179
    Mal-Gly-PAB-Exatecan-D-glucuronic acid
    Inhibitor 99.82%
    Mal-Gly-PAB-Exatecan-D-glucuronic acid can be used for Antibody-Drug Conjugates (ADCs) synthesis. Mal-Gly-PAB-Exatecan-D-glucuronic acid can be used for research of tumor research and diagnosis.
    Mal-Gly-PAB-Exatecan-D-glucuronic acid
  • HY-147270
    MC-VA-PAB-Exatecan
    Inhibitor 99.58%
    MC-VA-PAB-Exatecan is a agent-linker conjugate for ADC. MC-VA-PAB-Exatecan contains the ADC linker (peptide MC-VA-PAB) and a DNA topoisomerase I inhibitor Exatecan (HY-13631). MC-VA-PAB-Exatecan synthesized ADC shows good antitumor activity.
    MC-VA-PAB-Exatecan
  • HY-16261
    Aldoxorubicin
    Inhibitor
    Aldoxorubicin (INNO-206) is an albumin-binding proagent of Doxorubicin (DNA topoisomerase II inhibitor), which is released from albumin under acidic conditions. Aldoxorubicin (INNO-206) has potent antitumor activities in various cancer cell lines and in murine tumor models.
    Aldoxorubicin
  • HY-145399
    AZ14170133
    Inhibitor 98.95%
    Mal-PEG8-amide-Val-Ala-(4-NH2)-Exatecan is a Drug-Linker Conjugates for ADC, which comprises a topoisomerase inhibitor and a linker for ligand unit connecting. Mal-PEG8-amide-Val-Ala-(4-NH2)-Exatecan can be used to synthesis antibody-drug conjugate (ADC).
    AZ14170133
  • HY-N2306
    Aclacinomycin A
    Inhibitor 99.30%
    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.
    Aclacinomycin A
  • HY-122575
    Aurintricarboxylic acid
    Inhibitor
    Aurintricarboxylic acid is a nanomolar-potency, allosteric antagonist with selectivity towards αβ-methylene-ATP-sensitive P2X1Rs and P2X3Rs, with IC50s of 8.6 nM and 72.9 nM for rP2X1R and rP2X3R, respectively. Aurintricarboxylic acid is a potent anti-influenza agent by directly inhibiting the neuraminidase. Aurintricarboxylic acid is an inhibitor of topoisomerase II and apoptosis. Aurintricarboxylic acid is a selective inhibitor of the TWEAK-Fn14 signaling pathway. Aurintricarboxylic acid also acts as a cystathionine-lyase (CSE) inhibitor with an IC50 of 0.6 μM. Aurintricarboxylic acid is a modifier of miRNAs that regulate miRNA function, with an IC50 of 0.47 µM.
    Aurintricarboxylic acid
  • HY-156376
    Cu(II)-Elesclomol
    Inhibitor 99.99%
    Cu(II)-Elesclomol is a Cu2+ complex of Elesclomol (HY-12040). Cu(II)-Elesclomol induces cuproptosis. Cu(II)-Elesclomol also inducesapoptosis, causes a G1 cell cycle block and induces DNA double strand breaks in K562 cells. Cu(II)-Elesclomol also weakly inhibits DNA topoisomerase I. Cu(II)-Elesclomol has anticancer activity.
    Cu(II)-Elesclomol
  • HY-15142R
    Doxorubicin (hydrochloride) (Standard)
    Inhibitor
    Doxorubicin hydrochloride (Standard) is the analytical standard of Doxorubicin hydrochloride. This product is intended for research and analytical applications. Doxorubicin (Hydroxydaunorubicin) hydrochloride, a cytotoxic anthracycline antibiotic, is an anti-cancer chemotherapy agent. Doxorubicin hydrochloride is a potent human DNA topoisomerase I and topoisomerase II inhibitor with IC50s of 0.8 μM and 2.67 μM, respectively. Doxorubicin hydrochloride reduces basal phosphorylation of AMPK and its downstream target acetyl-CoA carboxylase. Doxorubicin hydrochloride induces apoptosis and autophagy.
    Doxorubicin (hydrochloride) (Standard)
  • HY-13562A
    Banoxantrone dihydrochloride
    Inhibitor 99.46%
    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.
    Banoxantrone dihydrochloride
  • HY-147271
    Mal-PEG8-Val-Ala-PAB-Exatecan
    Inhibitor 99.48%
    Mal-PEG8-Val-Ala-PAB-Exatecan (Compound 9b) is an antibody-drug conjugate linker (ADC linker) that binds to Nectin-4 polypeptides conjugated to chemotherapeutic agents. Mal-PEG8-Val-Ala-PAB-Exatecan can be used for cancer research.
    Mal-PEG8-Val-Ala-PAB-Exatecan
  • HY-103399
    Trovafloxacin mesylate
    Inhibitor 99.76%
    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.
    Trovafloxacin mesylate
  • HY-B0398
    Nalidixic acid
    Inhibitor 99.97%
    Nalidixic acid, 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.
    Nalidixic acid
  • HY-44369
    Exatecan Intermediate 6
    Inhibitor 98.92%
    Exatecan Intermediate 6 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 6 can be used to synthesize Antibody-Drug Conjugates (ADCs).
    Exatecan Intermediate 6
  • HY-N2331
    Proscillaridin A
    Inhibitor 99.74%
    Proscillaridin A is a potent poison of topoisomerase I/II activity with IC50 values of 30 nM and 100 nM, respectively.
    Proscillaridin A
  • HY-148820
    Br-Val-Ala-NH2-bicyclo[1.1.1]pentane-7-MAD-MDCPT
    Inhibitor 98.65%
    Br-Val-Ala-NH2-bicyclo[1.1.1]pentane-7-MAD-MDCPT (Formula V) is a agent-linker conjugate that composed of a potent topoisomerase I inhibitor and a linker to make antibody agent conjugate (ADC).
    Br-Val-Ala-NH2-bicyclo[1.1.1]pentane-7-MAD-MDCPT
  • HY-A0170
    Trovafloxacin
    Inhibitor 98.99%
    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.
    Trovafloxacin
  • HY-17577
    Berberine chloride hydrate
    Inhibitor 99.82%
    Berberine chloride hydrate (Natural Yellow 18 chloride hydrate) is an alkaloid that acts as an antibiotic. Berberine chloride hydrate induces reactive oxygen species (ROS) generation and inhibits DNA topoisomerase. Antineoplastic properties.
    Berberine chloride hydrate
  • HY-B0330A
    Levofloxacin hydrate
    Inhibitor 99.93%
    Levofloxacin hydrate (Levofloxacin hemihydrate) is an orally active antibiotic and is active against both Gram-positive and Gram-negative bacteria. Levofloxacin hydrate inhibits the DNA gyrase and topoisomerase IV. Levofloxacin hydrate can be used for chronic periodontitis, airway inflammation and BK Viremia research. Levofloxacin hydrate shows anti-orthopoxvirus activity.
    Levofloxacin hydrate
Cat. No. Product Name / Synonyms Application Reactivity

Topoisomerase

Topo I

Topo II

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Sorry. There is currently no product that acts on isoform together.

Please try each isoform separately.

Topoisomerase Inhibitors & Agonists
Product NameTopoisomeraseTopo ITopo IIPurity    
Doxorubicin hydrochloride 
Topoisomerase I, IC50: 0.8 μM
Topoisomerase II, IC50: 2.67 μM
99.90%
Etoposide  
Topoisomerase II
99.94%
Dxd 
Topoisomerase I, IC50: 0.31 μM
 99.30%
SN-38 
Topoisomerase I
 99.89%
Camptothecin 
Topoisomerase I, IC50: 679 nM
 99.86%
Irinotecan 
Topoisomerase I
 99.97%
Topotecan hydrochloride 
Topoisomerase I
 99.89%
Daunorubicin hydrochloride  
Topoisomerase II
99.67%
Mitoxantrone  
Topoisomerase II
99.58%
Epirubicin hydrochloride
Topoisomerase
  99.16%
Irinotecan hydrochloride 
Topoisomerase I
 99.89%
Datopotamab deruxtecan 
Topoisomerase I
 99.54%
Levofloxacin
TOPO IV
  99.92%
Idarubicin hydrochloride  
Topoisomerase II
99.94%
Betulinic acid 
Topoisomerase I, IC50: 5 μM
 98.43%
Mitoxantrone dihydrochloride  
Topoisomerase II
99.55%
β-Lapachone 
Topoisomerase I
 99.99%
Dxd-d5 
Topoisomerase I, IC50: 0.31 μM
 98.84%
Teniposide  
Topoisomerase II
99.00%
Pirarubicin  
Topoisomerase II
99.61%
Irinotecan hydrochloride trihydrate 
Topoisomerase I
 99.89%
PNU-159682 
Topoisomerase I
 98.25%
Belotecan hydrochloride 
Top1
 99.88%
Etoposide phosphate  
Topoisomerase II
Aldoxorubicin  
Topoisomerase II
Aclacinomycin A 
Topoisomerase I
Topoisomerase II
99.30%
Aurintricarboxylic acid  
Topoisomerase II
Banoxantrone dihydrochloride  
Topoisomerase II
99.46%
Nalidixic acid
Topoisomerase
  99.97%
Proscillaridin A 
Topoisomerase I, IC50: 30 nM
Topoisomerase II, IC50: 100 nM
99.74%
Levofloxacin hydrate
TOPO IV
  99.93%
Pirarubicin Hydrochloride  
Topoisomerase II
98.56%
(S)-10-Hydroxycamptothecin 
Topoisomerase I
 99.38%
Ellipticine  
Topoisomerase II
99.56%
Bisantrene  
Topoisomerase II
98.08%
Pixantrone  
Topoisomerase II
98.75%
Amsacrine  
Topoisomerase II
99.95%
Gatifloxacin  
Topoisomerase II, IC50: 36.7 μM
99.69%
PluriSIn #2  
topoisomerase II alpha
≥98.0%
MC-GGFG-AM-(10Me-11F-Camptothecin) 
Topoisomerase I
 98.06%
Hycanthone 
Topoisomerase I
Topoisomerase II
99.97%
Ellipticine hydrochloride  
Topoisomerase II
99.34%
Amonafide  
Topoisomerase II
99.92%
Coralyne chloride 
Topoisomerase I
 98.30%
Voreloxin Hydrochloride  
Topoisomerase II
99.58%
Amsacrine hydrochloride  
Topoisomerase II
99.98%
TAS-103 dihydrochloride 
Topoisomerase I
Topoisomerase II
98.87%
MC-DOXHZN hydrochloride  
Topoisomerase II
98.04%
Chloroquinoxaline sulfonamide  
topoisomerase II alpha
topoisomerase II beta
99.06%
Indotecan 
Topoisomerase I
 ≥98.0%
Amrubicin  
Topoisomerase II
≥98.0%
Genz-644282 
Topoisomerase I
 99.53%
9-Aminocamptothecin 
Topoisomerase I
 98.89%
(±)-10-Hydroxycamptothecin 
Topoisomerase I
 99.57%
Nalidixic acid sodium salt
Topoisomerase
  99.83%
Intoplicine 
Topoisomerase I
Topoisomerase II
98.36%
Gatifloxacin hydrochloride  
Topoisomerase II, : 36.7 μM
99.94%
Daun02
Topoisomerase
  98.72%
Flumequine  
Topoisomerase II, IC50: 15 μM
Gimatecan 
Topoisomerase I
 99.28%
(±)-Evodiamine 
Top1
 99.74%
Lurtotecan 
Topoisomerase I
 98.01%
Isodiospyrin 
Topoisomerase I
 99.77%
Indimitecan 
Top1
 98.30%
Karenitecin 
Topoisomerase I
 98.02%
LMP744 hydrochloride 
Top1
 99.70%
Groenlandicine 
Topoisomerase I
 99.87%
ARN-21934  
topoisomerase II alpha
topoisomerase II beta
98.08%
Levofloxacin hydrochloride
TOPO IV
  ≥98.0%
Podocarpusflavone A 
Topoisomerase I, IC50: 119.425 μM
 99.62%
LMP517 
Topoisomerase I
Topoisomerase II
99.58%
Garenoxacin Mesylate hydrate
TOPO IV, IC50: 1.5-2.5 μg/mL
  99.78%
LMP744 
Top1
 98.85%
Aclacinomycin A hydrochloride 
Topoisomerase I
Topoisomerase II
Namitecan 
Topoisomerase I
 99.25%
Elomotecan hydrochloride 
Topoisomerase I
Topoisomerase II
SW044248 
Topoisomerase I
 99.60%
Epirubicin
Topoisomerase
  98.45%
Topoisomerase I inhibitor 8 
Topoisomerase I
 
Topoisomerase II inhibitor 20 TFA  
Topoisomerase II, IC50: 0.98 μM
9-Hydroxyellipticine hydrochloride  
Topoisomerase II
≥99.0%
Topotecan 
Topoisomerase I
 
Doxorubicin 
Topoisomerase I, IC50: 0.8 μM
Topoisomerase II, IC50: 2.67 μM
Daunorubicin  
Topoisomerase II
Topoisomerase II inhibitor 20  
Topoisomerase II, IC50: 0.98 μM
98.44%
CH-0793076 
Topoisomerase I, IC50: 2.3 μM
 
AQ4  
Topoisomerase II
BNS-22  
topoisomerase II alpha, IC50: 2.8 μM (in human)
topoisomerase II beta, IC50: 0.42 μM (in human)
99%
Seconeolitsine 
Topoisomerase I, IC50: 17 μM
 
Edotecarin 
Topoisomerase I, IC50: 50 nM
 98.39%
CH-0793076 TFA 
Topoisomerase I, IC50: 2.3 μM
 98.71%
Zabofloxacin 
Topoisomerase I
Topoisomerase II
98.02%
Zabofloxacin hydrochloride 
Topoisomerase I
Topoisomerase II
99.54%
Amrubicin hydrochloride  
Topoisomerase II
Pixantrone free base  
Topoisomerase II
Voreloxin  
Topoisomerase II
99.26%
TAS-103 
Topoisomerase I
Topoisomerase II
MC-DOXHZN  
Topoisomerase II
Topotecan hydrochloride hydrate 
Topoisomerase I
 
Etoposide phosphate disodium  
Topoisomerase II
Idarubicin  
Topoisomerase II
Gatifloxacin sesquihydrate  
Topoisomerase II, IC50: 36.7 μM
Rebeccamycin 
Topoisomerase I
 
Mitoxantrone diacetate  
Topoisomerase II
CBX-12 
Topoisomerase I
 
Daunorubicin citrate  
Topoisomerase II
Antitumor agent-63 
Top1
 
Silatecan 
Topoisomerase I
 
Topoisomerase II inhibitor 9  
Topoisomerase II, IC50: 0.97 μM
Topo I/COX-2-IN-1 
Topoisomerase I, IC50: 4.42 μM
 
Bimolane  
Topoisomerase II
T-2513 hydrochloride 
Topoisomerase I
 
TOPOI/PARP-1-IN-2 
Top1, IC50: 46.2 nM
 
Topo I/COX-2-IN-2 
Topoisomerase I, IC50: 0.90 μM
 
Topoisomerase II inhibitor 11  
Topoisomerase II, IC50: 2.89 μM
CS1  
topoisomerase II alpha
T-2513 
Topoisomerase I
 
Razoxane  
Topoisomerase II
99.16%
Topoisomerase IIα-IN-3  
topoisomerase II alpha
Heliquinomycin 
Topoisomerase I
Topoisomerase II
Topoisomerase II/EGFR-IN-1  
Topoisomerase II
VcMMAE-Deruxtecan 
Topoisomerase I
 
Anticancer agent 75  
Topoisomerase II
CP-67804  
Topoisomerase II
DTS-108 
Top1
 
Pixantrone hydrochloride  
Topoisomerase II
Topoisomerase II inhibitor 4  
Topoisomerase II
Topoisomerase IIα-IN-6  
topoisomerase II alpha, IC50: 0.67 μM
Topoisomerase IIα-IN-2  
topoisomerase II alpha
topoisomerase II beta
Topoisomerase IIα-IN-4  
topoisomerase II alpha, IC50: 3.8 μM
topoisomerase II beta, IC50: 10.1 μM
ZLHQ-5f 
Top1
 
3-Fluoro-evodiamine glucose 
Topoisomerase I
Topoisomerase II
Topo I-IN-1 
Topoisomerase I
 
Topoisomerase I/II inhibitor 6 
Topoisomerase I, IC50: 4.77 μM
Topoisomerase II, IC50: 15 μM
EGFR-IN-116  
Topoisomerase II, IC50: 19.74 μM
Top/HDAC-IN-2 
Top1
Topoisomerase II
Anti-MRSA agent 7
TOPO IV, IC50: 0.059 μM (E. coli )
TOPO IV, IC50: 0.341 μM (S. aureus)
  
Topoisomerase II inhibitor 18  
Topoisomerase II, IC50: 7.5 μM
Topoisomerase I inhibitor 17 
Top1
 
Elomotecan 
Topoisomerase I
Topoisomerase II
Topoisomerase II inhibitor 5  
Topoisomerase II
LE01 
Topoisomerase I
 
HSP90-IN-13
Topoisomerase-2, IC50: 25.85 nM
  
Topoisomerase I inhibitor 2 
Topoisomerase I, IC50: 0.58 μM
 
iNOS/TopoI-IN-1 
Topoisomerase I, Ki: 2.72 μM
 
Topoisomerase II inhibitor 10  
Topoisomerase II, IC50: 7.45 μM
Salvicine  
Topoisomerase II, IC50: 3 μM
Topoisomerase IV inhibitor 1
TOPO IV, IC50: 0.23 μM
  
Topoisomerase II inhibitor 13  
Topoisomerase II
99.26%
EGFR-IN-57  
topoisomerase II beta, IC50: 0.13 μM
Topoisomerase IIα-IN-1  
topoisomerase II alpha
topoisomerase II beta
Huanglongmycin N 
Topoisomerase I, EC50: 14 μM
 
Topoisomerase IIα-IN-8  
topoisomerase II alpha
Tilatamig samrotecan 
Topoisomerase I
 
Deruxtecan-Eribulin 
Topoisomerase I
 
CP-67015  
Topoisomerase II
Tapcin 
Topoisomerase I, IC50: 203 nM
Topoisomerase II, IC50: 71 nM
Topoisomerase I inhibitor 12 
Topoisomerase I
 
Topoisomerase II inhibitor 17  
Topoisomerase II, IC50: 0.23 μM
Topoisomerase I/II inhibitor 2 
Topoisomerase I
Topoisomerase II
Topo I/II-IN-2 
Topoisomerase I
Topoisomerase II
Saintopin 
Topoisomerase I
Topoisomerase II
Intoplicine dimesylate 
Topoisomerase I
Topoisomerase II
98.28%
Topoisomerase IV inhibitor 2
TOPO IV, IC50: 0.35 μM
  
Topoisomerase II inhibitor 7  
topoisomerase II alpha, IC50: 3.19 μM
Topoisomerase I/II inhibitor 7 
Topoisomerase I
Topoisomerase II
Topoisomerase IIα-IN-7  
topoisomerase II alpha, IC50: 7.7 μM
Niranthin
Topoisomerase
  
Epolactaene  
Topoisomerase II, IC50: 10 μM
Topoisomerase I inhibitor 3 
Topoisomerase I
 
Topoisomerase II inhibitor 19  
Topoisomerase II, IC50: 0.34 μM
Corydamine 
Topoisomerase I
Topoisomerase II
TP0480066  
Topoisomerase II
AZD5099  
Topoisomerase II
Topoisomerase I inhibitor 16 
Topoisomerase I
 
TP3011 
Topoisomerase I
 
Topoisomerase II inhibitor 8  
Topoisomerase II, IC50: 0.52 μM
Topoisomerase I/II inhibitor 3 
Topoisomerase I
Topoisomerase II
Gatifloxacin mesylate  
Topoisomerase II, IC50: 36.7 μM
Topoisomerase IIα-IN-5  
topoisomerase II alpha
Thaspine acetate 
Topoisomerase I
Topoisomerase II
Antibacterial agent 229
TOPO IV, IC50: 10.88 μM
  
(-)-BO 2367  
Topoisomerase II
8-Chloro-ATP tetrasodium  
Topoisomerase II
Garenoxacin
TOPO IV, IC50: 1.5-2.5 μg/mL
  
HU 331  
Topoisomerase II
Luotonin F  
Topoisomerase II
Topovale 
Topoisomerase I
 
NK 314  
topoisomerase II alpha
8-Chloro-ATP  
Topoisomerase II