Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/3090
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dc.contributor.authorMonroig, Oscaren_UK
dc.contributor.authorLi, Yuanyouen_UK
dc.contributor.authorTocher, Douglas Ren_UK
dc.date.accessioned2013-06-09T07:00:16Z-
dc.date.available2013-06-09T07:00:16Z-
dc.date.issued2011-08en_UK
dc.identifier.urihttp://hdl.handle.net/1893/3090-
dc.description.abstractThe benefits of dietary fish and fish oil are derived from n-3 long-chain polyunsaturated fatty acids (LC-PUFA) that have beneficial effects in a range of human diseases and pathologies such as cardiovascular and other inflammatory disorders, neural development and neurological pathologies. The precursor of n-3 LC-PUFA, 18:3n-3 does not have the same beneficial effects prompting interest in the pathways of endogenous synthesis of LC-PUFA in vertebrates. The LC-PUFA biosynthesis pathway classically involves Δ6 and Δ5 fatty acyl desaturases (Fad), but it was recently shown that Δ6 Fad in mammals also displayed Δ8 activity demonstrating a possible alternative “Δ8-pathway” for the synthesis of LC-PUFA. Our primary hypothesis was that Δ8 desaturase activity would be a common feature of vertebrate Δ6 Fads, and so the aim of the present study was to determine the ability of teleostei Fads for Δ8 desaturation activity. To this end, cDNAs for Fads from a range of freshwater, diadromous and marine teleost fish species were assayed for Δ8 activity in the heterologous yeast expression system. In summary, the present study has demonstrated that Δ8 desaturation activity was also a characteristic of fish orthologs, although the activity varied notably between freshwater/diadromous and marine fish species, with the latter possessing Fads2-like proteins with Δ8 activity far higher than mammalian FADS2. The data showed that, generally, the fish Fad are technically υ-3 desaturases, with new double bonds introduced 3C beyond a pre-existing double bond. However, the ability of zebrafish and rabbitfish Fads, previously characterised as Δ6/Δ5 bifunctional desaturases, to introduce non-methylene interrupted double bonds in 20:3n-3 and 20:2n-6 suggested that a novel combination of regioselectivity modes operates within these enzymes.en_UK
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.relationMonroig O, Li Y & Tocher DR (2011) Delta-8 desaturation activity varies among fatty acyl desaturases of teleost fish: high activity in delta-6 desaturases of marine species. Comparative Biochemistry and Physiology - Part B: Biochemistry and Molecular Biology, 159 (4), pp. 206-213. http://www.sciencedirect.com/science/journal/10964959; https://doi.org/10.1016/j.cbpb.2011.04.007en_UK
dc.rightsPublished in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology by Elsevier. Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, Volume 159, Issue 4, August 2011, pp. 206 - 213.; This is the peer reviewed version of this article.; NOTICE: this is the author’s version of a work that was accepted for publication in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, VOL 159, ISSUE 4, (August 2011). DOI: 10.1016/j.cbpb.2011.04.007.en_UK
dc.subjectTeleost fishen_UK
dc.subjectlong-chain polyunsaturated fatty aciden_UK
dc.subjectBiosynthesisen_UK
dc.subjectFatty acyl desaturasesen_UK
dc.subjectDelta-8 activityen_UK
dc.subjectDelta-6 activityen_UK
dc.subjectYeast expression assayen_UK
dc.subjectMarineen_UK
dc.subjectFreshwateren_UK
dc.subjectDietary supplementsen_UK
dc.subjectFishes nutritionen_UK
dc.subjectFishes feeding and feedsen_UK
dc.subjectLipids in nutritionen_UK
dc.titleDelta-8 desaturation activity varies among fatty acyl desaturases of teleost fish: high activity in delta-6 desaturases of marine speciesen_UK
dc.typeJournal Articleen_UK
dc.identifier.doi10.1016/j.cbpb.2011.04.007en_UK
dc.citation.jtitleComparative Biochemistry and Physiology - Part B: Biochemistry and Molecular Biologyen_UK
dc.citation.issn1096-4959en_UK
dc.citation.volume159en_UK
dc.citation.issue4en_UK
dc.citation.spage206en_UK
dc.citation.epage213en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.identifier.urlhttp://www.sciencedirect.com/science/journal/10964959en_UK
dc.author.emaildrt1@stir.ac.uken_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationShantou Universityen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.identifier.isiWOS:000292664100003en_UK
dc.identifier.scopusid2-s2.0-79958847618en_UK
dc.identifier.wtid838625en_UK
dc.contributor.orcid0000-0001-8712-0440en_UK
dc.contributor.orcid0000-0002-8603-9410en_UK
dc.date.accepted1990-01-01en_UK
dcterms.dateAccepted1990-01-01en_UK
dc.date.filedepositdate2011-06-15en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionAMen_UK
local.rioxx.authorMonroig, Oscar|0000-0001-8712-0440en_UK
local.rioxx.authorLi, Yuanyou|en_UK
local.rioxx.authorTocher, Douglas R|0000-0002-8603-9410en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2011-08-31en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||2011-08-31en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/all-rights-reserved|2011-08-31|en_UK
local.rioxx.filenameManuscript Delta8 Final.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source1096-4959en_UK
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