Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/25526
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Molecular and functional characterisation of two elovl4 elongases involved in the biosynthesis of very long-chain (>C24) polyunsaturated fatty acids in black seabream Acanthopagrus schlegelii
Authors: Jin, Min
Monroig, Oscar
Navarro, Juan C
Tocher, Douglas R
Zhou, Qicun
Contact Email: om5@stir.ac.uk
Keywords: Acanthopagrus schlegelii
biosynthesis
Elongation of very long-chain fatty acid 4 protein, Very long-chain polyunsaturated fatty acids
Issue Date: Oct-2017
Citation: Jin M, Monroig O, Navarro JC, Tocher DR & Zhou Q (2017) Molecular and functional characterisation of two elovl4 elongases involved in the biosynthesis of very long-chain (>C24) polyunsaturated fatty acids in black seabream Acanthopagrus schlegelii, Comparative Biochemistry and Physiology - B: Comparative Biochemistry, 212, pp. 41-50.
Abstract: Elongation of very long-chain fatty acid (Elovl) 4 proteins are important fatty acyl elongases that participate in the biosynthesis of long-chain (C 20-24) and very long-chain (˃C24) polyunsaturated fatty acids (LC-PUFA and VLC-PUFA, respectively) in teleost fish, especially in marine species. Moreover, knowledge of Elovl4 and other elongases such as Elovl2 has contributed to an advanced understanding of the LC-PUFA biosynthetic pathway in marine fish. In the present study, elovl4a and elovl4b were cloned from black seabream Acanthopagrus schlegelii and functionally characterised using recombinant expression in yeast. The elovl4a and elovl4b cDNA sequences included open reading frames (ORF) of 969 and 918 base pairs (bp), encoding proteins of 322 and 315 amino acids (aa), respectively. The functional characterisation of A. schlegelii Elovl4 proteins showed they were able to utilise all assayed C18-22 PUFA substrates except 22:6n-3. Moreover, it was particularly noteworthy that both A. schlegelii Elovl4a and Elovl4b proteins had the ability to elongate 20:5n-3 and 22:5n-3 to 24:5n-3, which can be potentially desaturated and β-oxidised to 22:6n-3. Tissue transcript abundance analysis showed the highest expression of elovl4a and elovl4b in brain and eye, respectively, suggesting these tissues were major sites for VLC-PUFA biosynthesis in black seabream. The functions of the A. schlegelii Elovl4-like elongases, Elovl4a and Elovl4b, characterised in the present study, along with those of the Elovl5 and fatty acyl desaturase (Fads2) proteins of A. schlegelii characterised previously, provided evidence of the biosynthetic pathways of LC-PUFA and VLC-PUFA in this teleost species.
DOI Link: http://dx.doi.org/10.1016/j.cbpb.2017.06.008
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Accepted refereed manuscript of: Jin M, Monroig O, Navarro JC, Tocher DR & Zhou Q (2017) Molecular and functional characterisation of two elovl4 elongases involved in the biosynthesis of very long-chain (>C24) polyunsaturated fatty acids in black seabream Acanthopagrus schlegelii, Comparative Biochemistry and Physiology - B: Comparative Biochemistry, 212, pp. 41-50. DOI: 10.1016/j.cbpb.2017.06.008 © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

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