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Title: Metabolic Source Isotopic Pair Labeling and Genome-Wide Association Are Complementary Tools for the Identification of Metabolite-Gene Associations in Plants

Abstract

The optimal extraction of information from untargeted metabolomics analyses is a continuing challenge. Here, we describe an approach that combines stable isotope labeling, liquid chromatography– mass spectrometry (LC–MS), and a computational pipeline to automatically identify metabolites produced from a selected metabolic precursor. Here, we identified the subset of the soluble metabolome generated from phenylalanine (Phe) in Arabidopsis thaliana, which we refer to as the Phe-derived metabolome (FDM) In addition to identifying Phe-derived metabolites present in a single wild-type reference accession, the FDM was established in nine enzymatic and regulatory mutants in the phenylpropanoid pathway. To identify genes associated with variation in Phe-derived metabolites in Arabidopsis, MS features collected by untargeted metabolite profiling of an Arabidopsis diversity panel were retrospectively annotated to the FDM and natural genetic variants responsible for differences in accumulation of FDM features were identified by genome-wide association. Large differences in Phe-derived metabolite accumulation and presence/absence variation of abundant metabolites were observed in the nine mutants as well as between accessions from the diversity panel. Many Phe-derived metabolites that accumulated in mutants also accumulated in non-Col-0 accessions and was associated to genes with known or suspected functions in the phenylpropanoid pathway as well as genes with no knownmore » functions. Overall, we show that cataloguing a biochemical pathway’s products through isotopic labeling across genetic variants can substantially contribute to the identification of metabolites and genes associated with their biosynthesis.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Purdue Univ., West Lafayette, IN (United States)
  2. Purdue Univ., West Lafayette, IN (United States); Cold Springs Harbor Lab., NY (United States)
  3. North Carolina State Univ., Kannapolis, NC (United States); North Carolina State Univ., Raleigh, NC (United States)
Publication Date:
Research Org.:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division; USDOE Office of Science (SC), Basic Energy Sciences (BES); United States Dept. of Agriculture National Inst. of Food and Agriculture
OSTI Identifier:
1770370
Grant/Contract Number:  
SC0020368; FG02-07ER15905; 2018-08121/1019231
Resource Type:
Accepted Manuscript
Journal Name:
The Plant Cell (Online)
Additional Journal Information:
Journal Name: The Plant Cell (Online); Journal Volume: 33; Journal Issue: 3; Journal ID: ISSN 1532-298X
Publisher:
American Society of Plant Biologists (ASPB)
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 59 BASIC BIOLOGICAL SCIENCES; metabolomics; mass spectrometry; phenylpropanoid; GWAS; Arabidopsis

Citation Formats

Simpson, Jeffrey P., Wunderlich, Cole, Li, Xu, Svedin, Elizabeth, Dilkes, Brian, and Chapple, Clint. Metabolic Source Isotopic Pair Labeling and Genome-Wide Association Are Complementary Tools for the Identification of Metabolite-Gene Associations in Plants. United States: N. p., 2021. Web. doi:10.1093/plcell/koaa046.
Simpson, Jeffrey P., Wunderlich, Cole, Li, Xu, Svedin, Elizabeth, Dilkes, Brian, & Chapple, Clint. Metabolic Source Isotopic Pair Labeling and Genome-Wide Association Are Complementary Tools for the Identification of Metabolite-Gene Associations in Plants. United States. https://doi.org/10.1093/plcell/koaa046
Simpson, Jeffrey P., Wunderlich, Cole, Li, Xu, Svedin, Elizabeth, Dilkes, Brian, and Chapple, Clint. Wed . "Metabolic Source Isotopic Pair Labeling and Genome-Wide Association Are Complementary Tools for the Identification of Metabolite-Gene Associations in Plants". United States. https://doi.org/10.1093/plcell/koaa046. https://www.osti.gov/servlets/purl/1770370.
@article{osti_1770370,
title = {Metabolic Source Isotopic Pair Labeling and Genome-Wide Association Are Complementary Tools for the Identification of Metabolite-Gene Associations in Plants},
author = {Simpson, Jeffrey P. and Wunderlich, Cole and Li, Xu and Svedin, Elizabeth and Dilkes, Brian and Chapple, Clint},
abstractNote = {The optimal extraction of information from untargeted metabolomics analyses is a continuing challenge. Here, we describe an approach that combines stable isotope labeling, liquid chromatography– mass spectrometry (LC–MS), and a computational pipeline to automatically identify metabolites produced from a selected metabolic precursor. Here, we identified the subset of the soluble metabolome generated from phenylalanine (Phe) in Arabidopsis thaliana, which we refer to as the Phe-derived metabolome (FDM) In addition to identifying Phe-derived metabolites present in a single wild-type reference accession, the FDM was established in nine enzymatic and regulatory mutants in the phenylpropanoid pathway. To identify genes associated with variation in Phe-derived metabolites in Arabidopsis, MS features collected by untargeted metabolite profiling of an Arabidopsis diversity panel were retrospectively annotated to the FDM and natural genetic variants responsible for differences in accumulation of FDM features were identified by genome-wide association. Large differences in Phe-derived metabolite accumulation and presence/absence variation of abundant metabolites were observed in the nine mutants as well as between accessions from the diversity panel. Many Phe-derived metabolites that accumulated in mutants also accumulated in non-Col-0 accessions and was associated to genes with known or suspected functions in the phenylpropanoid pathway as well as genes with no known functions. Overall, we show that cataloguing a biochemical pathway’s products through isotopic labeling across genetic variants can substantially contribute to the identification of metabolites and genes associated with their biosynthesis.},
doi = {10.1093/plcell/koaa046},
journal = {The Plant Cell (Online)},
number = 3,
volume = 33,
place = {United States},
year = {Wed Jan 27 00:00:00 EST 2021},
month = {Wed Jan 27 00:00:00 EST 2021}
}

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