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Simpson JP, Kim CY, Kaur A, Weng JK, Dilkes B, Chapple C. Genome-wide association identifies a BAHD acyltransferase activity that assembles an ester of glucuronosylglycerol and phenylacetic acid. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 118:2169-2187. [PMID: 38558472 DOI: 10.1111/tpj.16737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/13/2024] [Accepted: 03/01/2024] [Indexed: 04/04/2024]
Abstract
Genome-wide association studies (GWAS) are an effective approach to identify new specialized metabolites and the genes involved in their biosynthesis and regulation. In this study, GWAS of Arabidopsis thaliana soluble leaf and stem metabolites identified alleles of an uncharacterized BAHD-family acyltransferase (AT5G57840) associated with natural variation in three structurally related metabolites. These metabolites were esters of glucuronosylglycerol, with one metabolite containing phenylacetic acid as the acyl component of the ester. Knockout and overexpression of AT5G57840 in Arabidopsis and heterologous overexpression in Nicotiana benthamiana and Escherichia coli demonstrated that it is capable of utilizing phenylacetyl-CoA as an acyl donor and glucuronosylglycerol as an acyl acceptor. We, thus, named the protein Glucuronosylglycerol Ester Synthase (GGES). Additionally, phenylacetyl glucuronosylglycerol increased in Arabidopsis CYP79A2 mutants that overproduce phenylacetic acid and was lost in knockout mutants of UDP-sulfoquinovosyl: diacylglycerol sulfoquinovosyl transferase, an enzyme required for glucuronosylglycerol biosynthesis and associated with glycerolipid metabolism under phosphate-starvation stress. GGES is a member of a well-supported clade of BAHD family acyltransferases that arose by duplication and neofunctionalized during the evolution of the Brassicales within a larger clade that includes HCT as well as enzymes that synthesize other plant-specialized metabolites. Together, this work extends our understanding of the catalytic diversity of BAHD acyltransferases and uncovers a pathway that involves contributions from both phenylalanine and lipid metabolism.
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Affiliation(s)
- Jeffrey P Simpson
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, 47907, USA
- Purdue Center for Plant Biology, West Lafayette, Indiana, 47907, USA
| | - Colin Y Kim
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts, 02142, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts, 02138, USA
| | - Amanpreet Kaur
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, 47907, USA
- Purdue Center for Plant Biology, West Lafayette, Indiana, 47907, USA
| | - Jing-Ke Weng
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts, 02142, USA
- Department of Chemistry and Chemical Biology & Department of Bioengineering, Northeastern University, Boston, Massachusetts, 02120, USA
- Institute for Plant-Human Interface, Northeastern University, Boston, Massachusetts, 02120, USA
| | - Brian Dilkes
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, 47907, USA
- Purdue Center for Plant Biology, West Lafayette, Indiana, 47907, USA
| | - Clint Chapple
- Department of Biochemistry, Purdue University, West Lafayette, Indiana, 47907, USA
- Purdue Center for Plant Biology, West Lafayette, Indiana, 47907, USA
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Tang Y, Zhang G, Jiang X, Shen S, Guan M, Tang Y, Sun F, Hu R, Chen S, Zhao H, Li J, Lu K, Yin N, Qu C. Genome-Wide Association Study of Glucosinolate Metabolites (mGWAS) in Brassica napus L. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12030639. [PMID: 36771722 PMCID: PMC9921834 DOI: 10.3390/plants12030639] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 01/18/2023] [Accepted: 01/27/2023] [Indexed: 06/12/2023]
Abstract
Glucosinolates (GSLs) are secondary plant metabolites that are enriched in rapeseed and related Brassica species, and they play important roles in defense due to their anti-nutritive and toxic properties. Here, we conducted a genome-wide association study of six glucosinolate metabolites (mGWAS) in rapeseed, including three aliphatic glucosinolates (m145 gluconapin, m150 glucobrassicanapin and m151 progoitrin), one aromatic glucosinolate (m157 gluconasturtiin) and two indole glucosinolates (m165 indolylmethyl glucosinolate and m172 4-hydroxyglucobrassicin), respectively. We identified 113 candidate intervals significantly associated with these six glucosinolate metabolites. In the genomic regions linked to the mGWAS peaks, 187 candidate genes involved in glucosinolate biosynthesis (e.g., BnaMAM1, BnaGGP1, BnaSUR1 and BnaMYB51) and novel genes (e.g., BnaMYB44, BnaERF025, BnaE2FC, BnaNAC102 and BnaDREB1D) were predicted based on the mGWAS, combined with analysis of differentially expressed genes. Our results provide insight into the genetic basis of glucosinolate biosynthesis in rapeseed and should facilitate marker-based breeding for improved seed quality in Brassica species.
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Affiliation(s)
- Yunshan Tang
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Guorui Zhang
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Xinyue Jiang
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Shulin Shen
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Mingwei Guan
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Yuhan Tang
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Fujun Sun
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Ran Hu
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Si Chen
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Huiyan Zhao
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Jiana Li
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Kun Lu
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Nengwen Yin
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
| | - Cunmin Qu
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
- Affiliation Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China
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Perez VC, Zhao H, Lin M, Kim J. Occurrence, Function, and Biosynthesis of the Natural Auxin Phenylacetic Acid (PAA) in Plants. PLANTS (BASEL, SWITZERLAND) 2023; 12:266. [PMID: 36678978 PMCID: PMC9867223 DOI: 10.3390/plants12020266] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/14/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Auxins are a class of plant hormones playing crucial roles in a plant's growth, development, and stress responses. Phenylacetic acid (PAA) is a phenylalanine-derived natural auxin found widely in plants. Although the auxin activity of PAA in plants was identified several decades ago, PAA homeostasis and its function remain poorly understood, whereas indole-3-acetic acid (IAA), the most potent auxin, has been used for most auxin studies. Recent studies have revealed unique features of PAA distinctive from IAA, and the enzymes and intermediates of the PAA biosynthesis pathway have been identified. Here, we summarize the occurrence and function of PAA in plants and highlight the recent progress made in PAA homeostasis, emphasizing PAA biosynthesis and crosstalk between IAA and PAA homeostasis.
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Affiliation(s)
- Veronica C. Perez
- Plant Molecular and Cellular Biology, University of Florida, Gainesville, FL 32611, USA
| | - Haohao Zhao
- Horticultural Sciences Department, University of Florida, Gainesville, FL 32611, USA
| | - Makou Lin
- Plant Molecular and Cellular Biology, University of Florida, Gainesville, FL 32611, USA
| | - Jeongim Kim
- Plant Molecular and Cellular Biology, University of Florida, Gainesville, FL 32611, USA
- Horticultural Sciences Department, University of Florida, Gainesville, FL 32611, USA
- Genetic Institute, University of Florida, Gainesville, FL 32611, USA
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