Linking Genomic and Metabolomic Natural Variation Uncovers Nematode Pheromone Biosynthesis.

Linking Genomic and Metabolomic Natural Variation Uncovers Nematode Pheromone Biosynthesis.
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DOI:
10.1016/j.chembiol.2018.04.004
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发表时间:
2018-06-21
影响因子:
8.6
通讯作者:
Sommer RJ
Sommer RJ
中科院分区:
生物学1区
文献类型:
--
作者:
Falcke JM;Bose N;Artyukhin AB;Rödelsperger C;Markov GV;Yim JJ;Grimm D;Claassen MH;Panda O;Baccile JA;Zhang YK;Le HH;Jolic D;Schroeder FC;Sommer RJ

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In the nematodes Caenorhabditis elegans and Pristionchus pacificus, a modular library of small molecules control behavior, lifespan, and development. However, little is known about the final steps of their biosynthesis, in which diverse building blocks from primary metabolism are attached to glycosides of the dideoxysugar ascarylose, the ascarosides. We combine metabolomic analysis of natural isolates of P. pacificus with genome-wide association mapping to identify a putative carboxylesterase, Ppa-uar-1, that is required for attachment of a pyrimidine-derived moiety in the biosynthesis of ubas#1, a major dauer pheromone component. Comparative metabolomic analysis of wildtype and Ppa-uar-1 mutants showed that Ppa-uar-1 is required specifically for the biosynthesis of ubas#1 and related metabolites. Heterologous expression of Ppa-UAR-1 in C. elegans yielded a non-endogenous ascaroside, whose structure confirmed that Ppa-uar-1 is involved in modification of a specific position in ascarosides. Our study demonstrates the utility of natural variation-based approaches for uncovering biosynthetic pathways. A small molecule library, the ascarosides, regulates the life history of Caenorhabditis elegans and Pristionchus pacificus. GWAS combined with metabolomics of P. pacificus natural isolates revealed a putative carboxylesterase, Ppa-uar-1, involved in attaching a pyrimidine-derived moiety in the biosynthesis of a major dauer pheromone component.
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