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dc.contributor.authorEstupinan, Monica
dc.contributor.authorHernandez, Igor
dc.contributor.authorSaitua, Eduardo
dc.contributor.authorElisabete Bilbao, M.
dc.contributor.authorMendibil, Inaki
dc.contributor.authorFerrer, Jorge
dc.contributor.authorAlonso-Saez, Laura
dc.date.accessioned2021-07-02T08:13:29Z-
dc.date.available2021-07-02T08:13:29Z-
dc.date.issued2020
dc.identifierISI:000518664600030
dc.identifier.urihttp://dspace.azti.es/handle/24689/1157-
dc.description.abstractOmega-3 long-chain polyunsaturated fatty acids (LC-PUFAs), such as eicosapentaenoic acid (EPA) (20:5n-3) and docosahexaenoic acid (DHA) (22:6n-3), are considered essential for human health. Microorganisms are the primary producers of omega-3 fatty acids in marine ecosystems, representing a sustainable source of these lipids, as an alternative to the fish industry. Some marine bacteria can produce LC-PUFAs de novo via the Polyunsaturated Fatty Acid (Pfa) synthase/ Polyketide Synthase (PKS) pathway, which does not require desaturation and elongation of saturated fatty acids. Cultivation-independent surveys have revealed that the diversity of microorganisms harboring a molecular marker of the pfa gene cluster (i.e., pfaA-KS domain) is high and their potential distribution in marine systems is widespread, from surface seawater to sediments. However, the isolation of PUFA producers from marine waters has been typically restricted to deep or cold environments. Here, we report a phenotypic and genotypic screening for the identification of omega-3 fatty acid producers in free-living bacterial strains isolated from 5, 500, and 1000 m deep coastal seawater from the Bay of Biscay (Spain). We further measured EPA production in pelagic Vibrio sp. strains collected at the three different depths. Vibrio sp. EPA-producers and non-producers were simultaneously isolated from the same water samples and shared a high percentage of identity in their 16S rRNA genes, supporting the view that the pfa gene cluster can be horizontally transferred. Within a cluster of EPA-producers, we found intraspecific variation in the levels of EPA synthesis for isolates harboring different genetic variants of the pfaA-KS domain. The maximum production of EPA was found in a Vibrio sp. strain isolated from a 1000 m depth (average 4.29\% +/- 1.07 of total fatty acids at 10 degrees C, without any optimization of culturing conditions).
dc.language.isoEnglish
dc.publisherMDPI
dc.subjectomega-3 fatty acid
dc.subjecteicosapentaenoic acid (EPA)
dc.subjectVibrio sp
dc.subjectpolyunsaturated fatty acid synthase Pfa
dc.subjectpolyketide synthase (PKS)
dc.subjectmarine gamma-Proteobacteria
dc.subjectPOLYUNSATURATED FATTY-ACIDS
dc.subjectEICOSAPENTAENOIC ACID
dc.subjectDOCOSAHEXAENOIC ACIDS
dc.subjectFUNCTIONAL EXPRESSION
dc.subjectMARINE BACTERIUM
dc.subjectGROWTH
dc.subjectPROFILES
dc.subjectGENES
dc.subjectPARAHAEMOLYTICUS
dc.subjectMICROORGANISMS
dc.titleNovel Vibrio spp. Strains Producing Omega-3 Fatty Acids Isolated from Coastal Seawater
dc.typeArticle
dc.identifier.journalMARINE DRUGS
dc.format.volume18
dc.contributor.funderEusko Jaurlaritza (ELKARTEK) [KK-2016/00057]
dc.contributor.funderEU H2020 SUMMER `Sustainable Management of Mesopelagic Resources' project [817806]
dc.identifier.e-issn1660-3397
dc.identifier.doi10.3390/md18020099
Appears in Publication types:Artículos científicos



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