“…[6][7][8] The rapid developments in genome sequencing technologies have resulted in the identification of TSs in various organisms including bacteria, [1] fungi, [9] plants, [10] social amobae, [11,12] insects, [13] octocorals, [14,15] and red algae. [16,17] For type I enzymes not only mono-and sesquiterpene synthases have been described, but more recently also several diterpene synthases, [18,19] sesterterpene synthases [20][21][22][23] and even triterpene synthases [24] have been reported. For the first characterised bacterial type I diterpene synthase (DTS), cyclooctat-9-en-7-ol synthase (CotB2) from Streptomyces melanosporofaciens, [25] the gene is clustered with genes for the GGPP synthase (GGPPS) CotB1 and for two cytochromes P450, CotB3 and CotB4, that convert cyclooctat-9-en-7-ol (1) via cyclooctat-9-en-5,7-diol (2) into the lysophospholipase inhibitor [26] cyclooctatin (3) (Scheme 1).…”