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3D model (JSmol)
Molar mass 582.51 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Telomestatin is a macrocyclic chemical compound that acts by inhibiting the telomerase activity of in vitro cancer cells.[1] It was first isolated from the bacteria Streptomyces anulatus.[1] Telomestatin induces the formation of basket-type G-quadruplex (G4) structures from hybrid-type G-quadruplexes in the telomeric region. Upon formation of G4 structure there will be a decrease in the activity of the telomerase, which is involved in the replication of the telomeres and as a result the cell dies due to Hayflick type senescence.


  1. ^ a b Shin-ya, Kazuo; Wierzba, Konstanty; Matsuo, Ken-ichi; Ohtani, Toshio; Yamada, Yuji; Furihata, Kazuo; Hayakawa, Yoichi; Seto, Haruo (2001). "Telomestatin, a novel telomerase inhibitor from Streptomyces anulatus". Journal of the American Chemical Society. 123 (6): 1262–1263. PMID 11456694. doi:10.1021/ja005780q.