Biosynthesis of a Tricyclo[6.2.2.0
<sup>2,7</sup>
]dodecane System by a Berberine Bridge Enzyme‐Like Aldolase
作者:Hang Li、Jinyu Hu、Haochen Wei、Peter S. Solomon、Keith A. Stubbs、Yit‐Heng Chooi
DOI:10.1002/chem.201904360
日期:2019.11.27
assay by using cell-free lysate from Aspergillus nidulans, we demonstrated that a berberine bridge enzyme (BBE)-like protein SthB catalyzes an intramolecular aldol reaction to establish the bridged tricyclo[6.2.2.02,7 ]dodecane skeleton in the post-assembly tailoring step. The characterization of SthB as an aldolase enriches the catalytic toolbox of classic reactions and the functional diversities of
(–)-Probetaenone I (1) has been synthesized by an intramolecular Diels–Alder reaction and, thereby, its structure has been clearly confirmed; in the biosynthesis of betaenoneB (2) the stereochemistry of the C-8 hydroxylation of (1) was proved to involve retention of configuration.
Heterologous expression of highly reducing polyketide synthase and trans-acting enoyl reductase provides insights into the skeletal construction of betaenones.