EPB as a free ligand exists in 3 entries. Examples include: 5MLV 1Q5D 6S8M

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View summary at Ligand Expo

Chemical Component Summary

FormulaC27 H41 N O6 S
Molecular Weight507.68
Isomeric SMILESC[C@H]1CCC[C@@]2(C)O[C@H]2C[C@H](OC(=O)C[C@H](O)C(C)(C)C(=O)[C@H](C)[C@H]1O)C(\C)=C\c1csc(C)n1

Chemical Details

Formal Charge0
Atom Count76
Chiral Atom Count7
Chiral AtomsC10, C11, C14, C2, C4, C5, C9
Bond Count78
Aromatic Bond Count5
Leaving Atomsn/a

Drug Info: DrugBank

DrugBank IDDB03010 Different stereochemistry
NameEpothilone B
  • experimental
  • investigational
DescriptionEpothilone B is a 16-membered macrolide that mimics the biological effects of taxol.
  • (−)-epothilone B
  • Epo B
  • Patupilone
Affected OrganismHumans and other mammals
IndicationInvestigated for use/treatment in ovarian cancer, lung cancer, brain cancer, breast cancer, and gastric cancer.
Mechanism of actionThe principal mechanism of the epothilone class is inhibition of microtubule function. Microtubules are essential to cell division, and epothilones therefore stop cells from properly dividing. Epothilone B possess the same biological effects as taxol both in vitro and in cultured cells. This is because they share the same binding site, as well as binding affinity to the microtubule. Like taxol, epothilone B binds to the αβ-tubulin heterodimer subunit. Once bound, the rate of αβ-tubulin dissociation decreases, thus stabilizing the microtubules. Furthermore, epothilone B has also been shown to induce tubulin polymerization into microtubules without the presence of GTP. This is caused by formation of microtubule bundles throughout the cytoplasm. Finally, epothilone B also causes cell cycle arrest at the G2-M transition phase, thus leading to cytotoxicity and eventually cell apoptosis.
  • Antimitotic Agents
  • Antineoplastic Agents
  • Chemical Actions and Uses
  • Lactones
  • Macrocyclic Compounds
CAS number152044-54-7
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682