Chemistry of coelenterates. Occurrence of gorgosterol. a C 30 sterol. in coelenterates and their zooxanthellae

Ciereszko, L.S.; Johnson, M.A.; Schmidt, R.W.; Koons, C.B.

Comp Biochem Physiol 24(3): 899-904


Accession: 024319747

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The sterols of a number of coelenterates and of their zooxanthellae have been examined by mass spectrometry. The sterols, with C27, C28, C29 and C30 skeletons, occur as complex mixtures. The occurrence of the "gorgosterol" of Bergmann in coelenterates has been confirmed; its molecular weight has been determined by mass spectrometry to be 426, corresponding to C30H50O. The occurrence of gorgosterol in coelenterates is associated with the occurrence of symbiotic zooxanthellae. Zooxanthellae from Anthopleura elegantissima, a sea anemone, and from Tridacna gigas. the giant clam, do not contain gorgosterol. Under anaerobic conditions gorgosterol is reduced in the zooxanthellae to a C30H52O compound, "dihydrogorgosterol".