Deep genome mining boosts the discovery of microbial terpenoids
The natural products terpenoids are widely distributed in animals(marine invertebrates),plants,microorganisms,with diverse molecular structures for bioactivities.A large number of terpenoids have been extracted directly from plants and microorganisms.However,traditional methods based on natural screening face challenges in discovering new terpenes due to the increasing number of known compounds at large quantities.The advent of next-generation sequencing and synthetic biology technologies marks the onset of the era of genome mining-driven natural product discovery,particularly in the exploration of new terpenoids.However,challenges persist in this regard,such as low efficiencies,interference of known compounds,and limited data throughput.In this review,we focus on recent advances in terpenoid discovery via microbial genome mining strategies,including the use of the precursor supplying microbial chassis(Escherichia coli,Saccharomyces cerevisiae,Aspergillus oryzae,Streptomyces albus,etc.),the microbial resources from extreme geographical environments,deep genome mining,and terpene mining platforms driven by artificial intelligence and automation techniques.To produce more terpenoids using heterologous hosts,multiple microbial chassis with enhanced precursor supply have been developed to improve their production yields and thus facilitate the discovery of structurally unique terpenoids.With the growing understanding of terpene biosynthesis machinery,the deep mining of terpenoid biosynthetic gene clusters and terpene synthases can effectively address issues related to repeated and irrelevant discoveries.Furthermore,the integration of artificial intelligence and automation platform with synthetic biology has ushered in the high-throughput intelligent discovery of terpenoids,which significantly improves the research and enables the discovery of numerous terpenoids with new structures.Finally,we address challenges and future directions for genome mining based terpenoid discovery.Driven by synthetic biology and artificial intelligence,a new chapter for the discovery of terpenoids and other natural products will open.We are looking forward to seeing more terpenoids to be developed as drugs and valuable chemicals in the future.
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