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PubChem 46224604
ChEBI CHEBI:59685 YesY
Jmol-3D images Image 1
Molecular formula C20H34O
Molar mass 290.48 g mol−1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Isotuberculosinol, also called nosyberkol or edaxadiene is a diterpene molecule produced by the bacterium Mycobacterium tuberculosis, the causative agent of TB, which aids in its pathogenesis. Isotuberculosinol functions by preventing maturation of the host-cell phagosome in which the bacterium lives.[1][2] Maturation of the phagosome would enable it to kill the bacterium. Mutations in genes involved in the biosynthetic pathway of nosyberkol result in normal development of the phagosome and reduction of mycobacterial infection. These biosynthetic genes include Isotuberculosinol synthase.

Nosyberkol was originally isolated in 2004 from a marine sponge in the ocean near island of Nosy Be after which it was named.[3] The molecule was characterised as a triterpene but the structure was revised following its chemical synthesis in 2010.[4]


  1. ^ Mann, F. M.; Xu, M.; Chen, X.; Fulton, D. B.; Russell, D. G.; Peters, R. J. (2009). "Edaxadiene: A New Bioactive Diterpene fromMycobacterium tuberculosis". Journal of the American Chemical Society 131 (48): 17526–17527. doi:10.1021/ja9019287. PMC 2787244. PMID 19583202.  edit
  2. ^ Mann, F. M.; Peters, R. J. (2012). "Isotuberculosinol: The unusual case of an immunomodulatory diterpenoid from Mycobacterium tuberculosis.". MedChemComm 3 (8): 899–904. doi:10.1039/c2md20030a. PMC 3733278. PMID 23926455.  edit
  3. ^ Rudi, A.; Aknin, M.; Gaydou, E.; Kashman, Y. (2004). "Asmarines I, J, and K and Nosyberkol:  Four New Compounds from the Marine SpongeRaspailiasp". Journal of Natural Products 67 (11): 1932–1935. doi:10.1021/np049834b. PMID 15568794.  edit
  4. ^ Spangler, J. E.; Carson, C. A.; Sorensen, E. J. (2010). "Synthesis enables a structural revision of the Mycobacterium tuberculosis-produced diterpene, edaxadiene". Chemical Science 1 (2): 202–205. doi:10.1039/C0SC00284D. PMC 3221386. PMID 22114734.  edit