Empirical Formula (Hill Notation): C20H16N2O4
Molecular Weight: 348.35
CAS Number: 7689-03-4
assay
90% (HPLC) | |
form | powder |
mp | 260 C (dec.)(lit.) |
solubility | chloroform/methanol (4:1): soluble5 mg/mL |
Mode of action | DNA synthesis | interferes |
enzyme | inhibits | |
storage temp. | 2-8C |
Gene Information | human ... TOP1(7150) mouse ... Prkca(18750) rat ... Sstr2(54305) |
20S isomer
1 g in glass bottle
100, 250 mg in glass bottle
(S)-(+)-Camptothecin binds irreversibly to the DNA-topoisomerase I complex, inhibiting the reassociation of DNA after cleavage by topoisomerase I and traps the enzyme in a covalent linkage with DNA. The enzyme complex is ubiquinated and destroyed by the 26S proteasome, thus depleting cellular topoisomerase I. Blocks the cell cycle in S-phase at low does and induces apoptosis in a large number of normal and tumor cell lines by cell cycle-dependent and cell cycle-independent processes.