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dc.contributor.authorXie, Dizhien_UK
dc.contributor.authorChen, Fangen_UK
dc.contributor.authorLin, Siyuanen_UK
dc.contributor.authorWang, Shuqien_UK
dc.contributor.authorYou, Cuihongen_UK
dc.contributor.authorMonroig, Oscaren_UK
dc.contributor.authorTocher, Douglas Ren_UK
dc.contributor.authorLi, Yuanyouen_UK
dc.description.abstractMarine fish are generally unable or have low ability for the biosynthesis of long-chain polyunsaturated fatty acids (LC-PUFA) from C18 PUFA precursors, with some notable exceptions including the herbivorous marine teleost Siganus canaliculatus in which such a capability was recently demonstrated. To determine whether this is a unique feature of S. canaliculatus or whether it is common to the herbivorous marine teleosts, LC-PUFA biosynthetic pathways were investigated in the herbivorous euryhaline Scatophagus argus. A putative desaturase gene was cloned and functionally characterized, and tissue expression and nutritional regulation were investigated. The full-length cDNA was 1972 bp, containing a 1338 bp open-reading frame encoding a polypeptide of 445 amino acids, which possessed all the characteristic features of fatty acyl desaturase (Fad). Functional characterization by heterologous expression in yeast showed the protein product of the cDNA efficiently converted 18:3n-3 and 18:2n-6 to 18:4n-3 and 18:3n-6, respectively, indicating D6 desaturation activity. Quantitative real-time PCR showed that highest D6 fad mRNA expression was detected in liver followed by brain, with lower expression in other tissues including intestine, eye, muscle, adipose, heart kidney and gill, and lowest expression in stomach and spleen. The expression of D6 fad was significantly affected by dietary lipid and, especially, fatty acid composition, with highest expression of mRNA in liver of fish fed a diet with a ratio of 18:3n-3/18:2n-6 of 1.72:1. The results indicated that S. argus may have a different LC-PUFA biosynthetic system from S. canaliculatus despite possessing similar habitats and feeding habits suggesting that LC-PUFA biosynthesis may not be common to all marine herbivorous teleosts.en_UK
dc.relationXie D, Chen F, Lin S, Wang S, You C, Monroig O, Tocher DR & Li Y (2014) Cloning, Functional Characterization and Nutritional Regulation of Delta 6 Fatty Acyl Desaturase in the Herbivorous Euryhaline Teleost Scatophagus Argus. PLoS ONE, 9 (3), Art. No.: e90200.
dc.rights© 2014 Xie et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_UK
dc.titleCloning, Functional Characterization and Nutritional Regulation of Delta 6 Fatty Acyl Desaturase in the Herbivorous Euryhaline Teleost Scatophagus Argusen_UK
dc.typeJournal Articleen_UK
dc.citation.jtitlePLoS ONEen_UK
dc.type.statusVoR - Version of Recorden_UK
dc.contributor.affiliationShantou Universityen_UK
dc.contributor.affiliationShantou Universityen_UK
dc.contributor.affiliationShantou Universityen_UK
dc.contributor.affiliationShantou Universityen_UK
dc.contributor.affiliationShantou Universityen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationShantou Universityen_UK
rioxxterms.apcnot requireden_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorXie, Dizhi|en_UK
local.rioxx.authorChen, Fang|en_UK
local.rioxx.authorLin, Siyuan|en_UK
local.rioxx.authorWang, Shuqi|en_UK
local.rioxx.authorYou, Cuihong|en_UK
local.rioxx.authorMonroig, Oscar|0000-0001-8712-0440en_UK
local.rioxx.authorTocher, Douglas R|0000-0002-8603-9410en_UK
local.rioxx.authorLi, Yuanyou|en_UK
local.rioxx.projectInternal Project|University of Stirling|
local.rioxx.filenamePlosOne 2014.pdfen_UK
Appears in Collections:Aquaculture Journal Articles

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