Download MendeleyBiosynthesis of reveromycin derivatives by altering the regioselectivity of cytochrome P450revI.
Yong, Y.F., Liu, S., Sakai, K., Fujiyama, K., Takagi, H., Futamura, Y., Shimizu, T., Osada, H., Ong, E.B.B., Takahashi, S.(2025) Chem Sci 16: 13106-13114
- PubMed: 40556721
- DOI: https://doi.org/10.1039/d5sc01355k
- Primary Citation of Related Structures:
9LN5 - PubMed Abstract:
Reveromycin A (RM-A) (1) has a 6,6-spiroacetal core structure that is important for its biological activity. However, 1 undergoes a spiroacetal rearrangement to form RM-B (2) with a 5,6-spiroacetal core, which exhibits reduced bioactivity. This undesired rearrangement is partly due to the hemisuccinate moiety at the C18 position of 1. In 1 biosynthesis, P450revI catalyses the C18-hydroxylation of RM-T (3), which is essential for its subsequent hemisuccinylation to generate 1. In this study, we aimed to alter the P450revI regioselectivity to improve the stability of the 6,6-spiroacetal core and expand the structural diversity of RMs. Candidate amino acid residues for mutagenesis studies were selected by comparing the co-crystal structure of P450revI with the docking models of the P450revI mutant-3 complexes. Notably, the P450revI-A241L mutant selectively produced novel RM derivatives. Nuclear magnetic resonance analysis revealed that P450revI-A241L catalysed the C17-hydroxylation of 3 to produce 17-hydroxy-RM-T (6). Co-crystal structure analysis of the P450revI-A241L-3 complex revealed that the pro- R hydrogen at the C17 position faces toward the haem iron. Introduction of the P450revI-A241L mutant gene into the Actinacidiphila reveromycinica SN-593-Δ revI strain led to the production of 17-hemisuccinyloxy-RM-T (7). After the successful bioproduction of RM derivatives, we evaluated their structural stabilities and biological activities. Compounds 6 and 7 exhibited better stabilities than 18-hydroxylated-3 (RM-T1; 4) and 1, respectively. Biological activity analysis revealed that 6 and 7 exhibited anti-malarial and anti-multiple myeloma activities, respectively, comparable to those of 1 and 3, while showing low cytotoxicity against human cell lines. Overall, this study highlights the potential of RM derivatives as pharmaceuticals.
- Natural Product Biosynthesis Research Unit, RIKEN Center for Sustainable Resource Science Wako Saitama 351-0198 Japan shunjitaka@riken.jp.
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