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Cloning, molecular characterization, and nutritional regulation of fatty acid-binding protein family genes in gold pompanos (Trachinotus ovatus)

文献类型： 外文期刊

作者： Lei, Caixia 1 ; Li, Mengmeng 1 ; Zhang, Me 2 ; Wang, Shuqi 2 ; Tian, Jingjing 3 ; Wen, Jikai 4 ; Li, Yuanyou 1 ;

作者机构： 1.South China Agr Univ, Guangdong Lab Lingnan Modern Agr, Coll Marine Sci, Guangzhou 510642, Peoples R China

2.Shantou Univ, Guangdong Prov Key Lab Marine Biotechnol, Shantou 515063, Peoples R China

3.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Trop & Subtrop Fishery Resource Applicat, Guangzhou 510380, Peoples R China

4.South China Agr Univ, Coll Life Sci, Guangzhou 510642, Peoples R China

关键词： Fatty acid-binding protein; Trachinotus ovatus; Characterization; Highly unsaturated fatty acid; Gene regulation

期刊名称：COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY （ 影响因子：2.231； 五年影响因子：2.215 ）

ISSN： 1096-4959

年卷期： 2020 年 246-24 卷

页码：

收录情况： SCI

摘要： Fatty acid-binding protein (Fabp) is an important protein family involved in fatty acid uptake and deposition. Elucidating the function and regulation of fabps could contribute to the efficient production of biologically relevant fatty acids, such as highly unsaturated fatty acids (HUFAs), from fish. Herein, five genes from Trachinotus ovatus named fabp4, fabp6a, fabp6b, fabp7a, and fabp7b coding 133, 127, 118, 132, and 132 amino acid residues were cloned and sequenced. The effect of dietary HUFA on the expression of these genes was also investigated. Multiple protein sequence alignment showed that these Fabps shared high identity to their orthologs from other fish and mammals. Two conserved domains, lipocalin and lipocalin 7, were predicted in the deduced protein sequence of fabp4 and fabp7 paralogs, whereas fabp6 paralogs did not present the lipocalin domain. The adipose tissue, spleen, gill, and intestine showed the highest levels of fabp6b expression. In the brain, fabp6b was weakly expressed, whereas the expression of fabp7a was at its highest. Conversely, fabp7a showed a lower mRNA level than the other fabps in the liver and heart. In the dorsal muscle and kidney, fabp6a was the most abundantly expressed gene. Increasing dietary HUFA from 1.0% to 2.1% increased the gene expression of hepatic fabp4 and fabp6a gene expression but decreased gene expression in the dorsal muscle. Similarly, the expression of fabp7a in the dorsal muscle also declined in the 2.1% HUFA group. This study lays the groundwork for further studies focused on the physiological function and regulation of fish fabps.

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