Evidence map›Paper›PMID 42013318›Full record

ArticlePlant physiology2026

Opposite diacylglycerol enantiomeric specificities of Arabidopsis DGAT1 and DGAT2 reveal distinct roles in TAG synthesis.

Chinnu Ann Jaison, Joachim Björklund, Sten Stymne, Kamil Demski, Per Hofvander, Ida Lager

Abstract read
In one paragraph

Article in Plant physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed
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3 · Its place in the literature

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1 citing paper in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Chinnu Ann JaisonDepartment of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp SE-230 53, Sweden.ORCID 0009-0005-5694-6107
Joachim BjörklundCentre for Analysis and Synthesis, Department of Chemistry, Lund University, Lund SE-221 00, Sweden.ORCID 0009-0003-2304-6407
Sten StymneDepartment of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp SE-230 53, Sweden.ORCID 0000-0002-0702-6882
Kamil DemskiDepartment of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp SE-230 53, Sweden.ORCID 0000-0002-5454-1748
Per HofvanderDepartment of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp SE-230 53, Sweden.ORCID 0000-0003-1048-2608
Ida LagerDepartment of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp SE-230 53, Sweden.ORCID 0000-0001-9755-8534

Funding

FORMAS
6 · The paper itself

Abstract

Triacylglycerol (TAG) serves as the primary storage lipid in plants, essential for seed germination and early seedling development. Acyl-CoA:diacylglycerol acyltransferase (DGAT) enzymes catalyze the last step in TAG synthesis by converting diacylglycerol (DAG) to TAG. Although functionally conserved across species, DGATs exhibit variations in substrate preference, among their other properties, highlighting their influence on fatty acid (FA) composition in TAG. In this study, we investigated the biochemical properties of Arabidopsis DGATs expressed in yeast with a primary emphasis on understanding the specificity and selectivity of these enzymes on different acyl acceptors and donors. One aim of the study was to investigate if the FA composition of TAG is due to DGAT selectivity in addition to being influenced by the distinct DAG pools (spatially separated de novo synthesized and phosphatidylcholine [PC]-derived DAG). Our findings showed that Arabidopsis (Arabidopsis thaliana) DGAT1 preferentially selects PC-derived DAGs. Further, we also report a new method for synthesizing sn-2,3-DAG that we used to study DGAT enantiomeric specificity. The results revealed that DGAT1 is specific toward the sn-1,2-DAG enantiomer whereas DGAT2 only utilizes sn-2,3-DAG, a substrate that is not directly involved in the Kennedy pathway. DGAT2 has so far not shown significant involvement in de novo TAG synthesis and thus our findings indicate a possible function for DGAT2 in Arabidopsis in TAG remodeling.

Indexed as

ArabidopsisArabidopsis ProteinsDiacylglycerol O-AcyltransferaseDiglyceridesTriglyceridesFatty AcidsStereoisomerismSubstrate SpecificityArabidopsis ProteinsDGAT1 protein, ArabidopsisDGAT2 protein, ArabidopsisDiacylglycerol O-AcyltransferaseDiglyceridesFatty AcidsTriglycerides

Identifiers

PMID42013318
PMCPMC13181396

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.