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Topoisomerase

Topoisomerase

Topoisomerases are enzymes that regulate the overwinding or underwinding of DNA.DNA's double-helical structure is entwined, which leads to the winding issue. Isomerization enzymes called topoisomerases work on DNA's topology. One strand of a DNA double helix is cut by type I topoisomerase, which is followed by relaxation and reannealing of the cut strand. Type I topoisomerases are divided into two subclasses: type IB topoisomerases, which employ a controlled rotary mechanism, and type IA topoisomerases, which share many structural and mechanistic features with the type II topoisomerases. One DNA double helix's two strands are cut by Type II topoisomerase, which then reanneals the cut strands after passing through another DNA double helix that hasn't been broken. Type IIA and type IIB topoisomerases, two subclasses of this class with related structures and mechanisms, are further divided.

Topoisomerase related products

Structure Cat No. Product Name CAS No. Product Description
Ellipticine V3828 Ellipticine 519-23-3 Ellipticine, originally identified as a natural product, is a DNA-damaging agent acting as a prodrug whose pharmacological efficiencies and genotoxic side effects are dictated by activation with cytochrome P450 (CYP).
Ellipticine HCl V3829 Ellipticine HCl 5081-48-1 Ellipticine HCl, originally identified as a natural product, is a DNA-damaging agent acting as a prodrug whose pharmacological efficiencies and genotoxic side effects are dictated by activation with cytochrome P450 (CYP).
Elomotecan hydrochloride (BN 80927) V55709 Elomotecan hydrochloride (BN 80927) 220997-99-9 Elomotecan HCl (BN 80927) is a potent inhibitor of topoisomerase I and II.
Epirubicin (4'-Epidoxorubicin) V30119 Epirubicin (4'-Epidoxorubicin) 56420-45-2 Epirubicin (IMI 28; IMI-28;4-epidoxorubicin; epiADR; epidoxorubicin; Ellence; Pharmorubicin PFS) is ananthracycline-basedanticancer agentused for chemotherapy.
erythro-Austrobailignan-6 V51544 erythro-Austrobailignan-6 114127-24-1 Erythro-Austrobailignan-6 is a novel, potent and orally bioactive anti-cancer agent.
Exatecan Intermediate 5 (N,N'-(3-氟-4-甲基-8-氧代-5,6,7,8-四氢萘-1,7-二基)二乙酰胺) V55710 Exatecan Intermediate 5 (N,N'-(3-fluoro-4-methyl-8-oxo-5,6,7,8-tetralin-1,7-diyl)diethylamide) 143655-70-3 Exatecan Intermediate 5 is an intermediate of Exatecan .
Exatecan Intermediate 6 (N-(3-氟-4-甲基-8-氧代-5,6,7,8-四氢-1-萘基)乙酰胺) V55711 Exatecan Intermediate 6 (N-(3-fluoro-4-methyl-8-oxo-5,6,7,8-tetrahydro-1-naphthyl)acetamide) 143655-58-7 Exatecan Intermediate 6 is an intermediate of Exatecan .
Exatecan Intermediate 7 V55712 Exatecan Intermediate 7 182182-32-7 Exatecan Intermediate 7 is an intermediate of Exatecan .
Exatecan-d5 mesylate (DX8951f-d5; Exatecan-d5 (mesylate); Deuterated labeled Exatecan (mesylate)) V55713 Exatecan-d5 mesylate (DX8951f-d5; Exatecan-d5 (mesylate); Deuterated labeled Exatecan (mesylate)) 2819276-88-3 Exatecan-d5 (mesylate) is the deuterium labelled form of Exatecan mesylate.
GENZ-644282 V21554 GENZ-644282 529488-28-6 Genz-644282, formerly known as SAR402674, is a novel, potent and non-camptothecin inhibitor of topoisomerase I with potential antineoplastic activity.
Guajadial C V55714 Guajadial C 1529775-02-7 Guajadial C is a Top1 catalytic inhibitor that delays DNA damage mediated by Top1 toxicity.
Hippeastrine (小星蒜碱) V51990 Hippeastrine (Hippeastrine) 477-17-8 Hippeastrine is an active alkaloid with good dose-dependent inhibition of topoisomerase I Top I with IC50 of 7.25 μg/mL.
Huanglongmycin N V55715 Huanglongmycin N 2881024-09-3 Huanglongmycin N is a DNA topoisomerase I inhibitor (EC50 = 14 μM).
ICRF-196 V55716 ICRF-196 21416-68-2 ICRF-196 is a racemic mixture (racemate) of the (S,S)- and (R,R)-isomers of ICRF-193 .
ikB V78288 ikB AuM1Gly? is a topoisomerase I (topoisomerase I< b>) inhibitor.
Indotecan (LMP-400; NSC-724998) V5157 Indotecan (LMP-400; NSC-724998) 915303-09-2 Indotecan (LMP400; NSC724998) is a novel, potent and selective topoisomerase I inhibitor with IC50values of 300, 1200, 560 nM for P388, HCT116, MCF-7 cell lines, respectively.
Intoplicine dimesylate (RP 60475 dimesylate) V9834 Intoplicine dimesylate (RP 60475 dimesylate) 133711-99-6 Intoplicine (RP 60475) dimesylate, an antitumor analogue of the 7H benzo[e]pyrido[4,3-b]indole series, is a DNA topoisomerase I and II inhibitor.
LMP517 (NSC 781517) V85840 LMP517 (NSC 781517) 1883730-99-1
LMP744 (MJ-III65; NSC706744) V5185 LMP744 (MJ-III65; NSC706744) 308246-52-8 LMP744 (Mj-III-65, NSC-706744) is a novel and potent DNA intercalator and Topoisomerase I (Top1) inhibitor with antitumor activity.
Luotonin A V54363 Luotonin A 205989-12-4 Luotonin A is an antiviral and antiphytopathogenic fungus agent.
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