Figure 4.
Proposed biosynthetic machinery of haliamide (1). (a) Genetic organization of the haliamide biosynthetic gene cluster (hla, 21.7 kbp) and a biosynthetic pathway for 1; (b) Decarboxylative chain termination at the final step leading to the formation of the terminal olefin at C-9 and C-10. Abbreviations: A, adenylation domain; ACP, acyl carrier protein; AT, acyl transferase; C, condensation domain; DH, dehydratase; ER, enoyl reductase; KR, ketoreductase; KS, ketosynthase; PCP, peptide carrier protein; ST, sulfotransferase; TE, thioesterase.