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Phenomics reveals a novel putative chloroplast fatty acid transporter in the marine diatom Skeletonema marinoi involved in temperature acclimation

Artikel i vetenskaplig tidskrift
Författare Oskar N. Johansson
Mats H. Töpel
Jenny Egardt
Matthew I. M. Pinder
Mats X. Andersson
Anna Godhe
Adrian K Clarke
Publicerad i Scientific Reports
Volym 9
ISSN 2045-2322
Publiceringsår 2019
Publicerad vid Institutionen för marina vetenskaper
Institutionen för biologi och miljövetenskap
Språk en
Länkar dx.doi.org/10.1038/s41598-019-51683...
Ämnesord genome, metabolism, microalgae, evolution, growth, lipids, genes, ocean, Science & Technology - Other Topics
Ämneskategorier Ekologi

Sammanfattning

Diatoms are the dominant phytoplankton in temperate oceans and coastal regions and yet little is known about the genetic basis underpinning their global success. Here, we address this challenge by developing the first phenomic approach for a diatom, screening a collection of randomly mutagenized but identifiably tagged transformants. Based upon their tolerance to temperature extremes, several compromised mutants were identified revealing genes either stress related or encoding hypothetical proteins of unknown function. We reveal one of these hypothetical proteins is a novel putative chloroplast fatty acid transporter whose loss affects several fatty acids including the two omega-3, long-chain polyunsaturated fatty acids - eicosapentaenoic and docosahexaenoic acid, both of which have medical importance as dietary supplements and industrial significance in aquaculture and biofuels. This mutant phenotype not only provides new insights into the fatty acid biosynthetic pathways in diatoms but also highlights the future value of phenomics for revealing specific gene functions in these ecologically important phytoplankton.

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