Volume 56, Issue 17 pp. 4729-4733
Communication

Biosynthesis of Modular Ascarosides in C. elegans

Oishika Panda

Oishika Panda

Boyce Thompson Institute and Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA

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Allison E. Akagi

Allison E. Akagi

Howard Hughes Medical Institute and Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA

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Dr. Alexander B. Artyukhin

Dr. Alexander B. Artyukhin

Boyce Thompson Institute and Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA

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Dr. Joshua C. Judkins

Dr. Joshua C. Judkins

Boyce Thompson Institute and Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA

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Henry H. Le

Henry H. Le

Boyce Thompson Institute and Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA

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Dr. Parag Mahanti

Dr. Parag Mahanti

Boyce Thompson Institute and Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA

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Sarah M. Cohen

Sarah M. Cohen

Boyce Thompson Institute and Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA

Howard Hughes Medical Institute and Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA

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Prof. Paul W. Sternberg

Prof. Paul W. Sternberg

Howard Hughes Medical Institute and Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA

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Prof. Frank C. Schroeder

Corresponding Author

Prof. Frank C. Schroeder

Boyce Thompson Institute and Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, USA

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First published: 28 March 2017
Citations: 33

Graphical Abstract

From the waste bin: C. elegans uses simple building blocks from primary metabolism to construct a modular library of signaling molecules, the ascarosides. It is demonstrated that lysosome-related organelles, which are essentially cellular waste-disposal centers, play a major role in the assembly of these compounds, which requires the activation of building blocks by a specific acyl-CoA synthetase.

Abstract

The nematode Caenorhabditis elegans uses simple building blocks from primary metabolism and a strategy of modular assembly to build a great diversity of signaling molecules, the ascarosides, which function as a chemical language in this model organism. In the ascarosides, the dideoxysugar ascarylose serves as a scaffold to which diverse moieties from lipid, amino acid, neurotransmitter, and nucleoside metabolism are attached. However, the mechanisms that underlie the highly specific assembly of ascarosides are not understood. We show that the acyl-CoA synthetase ACS-7, which localizes to lysosome-related organelles, is specifically required for the attachment of different building blocks to the 4′-position of ascr#9. We further show that mutants lacking lysosome-related organelles are defective in the production of all 4′-modified ascarosides, thus identifying the waste disposal system of the cell as a hotspot for ascaroside biosynthesis.

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