Tackling functional redundancy of Arabidopsis fatty acid elongase complexes

A - Papers appearing in refereed journals

Batsale, M., Alonso, M., Pascal, S., Thoraval, D., Haslam, R. P., Beaudoin, F., Domergue, F. and Joubes, J. 2023. Tackling functional redundancy of Arabidopsis fatty acid elongase complexes. Frontiers in Plant Science. 14, p. 1107333. https://doi.org/10.3389/fpls.2023.1107333

AuthorsBatsale, M., Alonso, M., Pascal, S., Thoraval, D., Haslam, R. P., Beaudoin, F., Domergue, F. and Joubes, J.

Very-long-chain fatty acids (VLCFA) are precursors for various lipids playing important physiological and structural roles in plants. Throughout plant tissues, VLCFA are present in multiple lipid classes essential for membrane homeostasis, and also stored in triacylglycerols. VLCFA and their derivatives are also highly abundant in lipid barriers, such as cuticular waxes in aerial epidermal cells and suberin monomers in roots. VLCFA are produced by the fatty acid elongase (FAE), which is an integral endoplasmic reticulum membrane multi-enzymatic complex consisting of four core enzymes. The 3-ketoacyl-CoA synthase (KCS) catalyzes the first reaction of the elongation and determines the chain-length substrate specificity of each elongation cycle, whereas the other three enzymes have broad substrate specificities and are shared by all FAE complexes. Consistent with the co-existence of multiple FAE complexes, performing sequential and/or parallel reactions to produce the broad chain-length-range of VLCFA found in plants, twenty-one KCS genes have been identified in the genome of Arabidopsis thaliana. Using CRISPR-Cas9 technology, we established an expression platform to reconstitute the different Arabidopsis FAE complexes in yeast. The VLCFA produced in these yeast strains were analyzed in detail to characterize the substrate specificity of all KCS candidates. Additionally, Arabidopsis candidate proteins were transiently expressed in Nicotiana benthamiana leaves to explore their activity and localization in planta. This work sheds light on the genetic and biochemical redundancy of fatty acid elongation in plants.

KeywordsYeast; Arabidopsis thaliana; Nicotiana benthamiana; VLCFA very-long-chain fatty acids); KCS gene family
Year of Publication2023
JournalFrontiers in Plant Science
Journal citation14, p. 1107333
Digital Object Identifier (DOI)https://doi.org/10.3389/fpls.2023.1107333
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeTPM - Tailoring Plant Metabolism - Work package 1 (WP1) - High value lipids for health and industry
Publisher's version
Output statusPublished
Publication dates
Online25 Jan 2023
Publication process dates
Accepted04 Jan 2023
PublisherFrontiers Media SA

Permalink - https://repository.rothamsted.ac.uk/item/98v86/tackling-functional-redundancy-of-arabidopsis-fatty-acid-elongase-complexes

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