适应淡水的多体具有完整的合成长链多不和脂肪酸的酶机制
Khalida Bainour1, Nabilah Zulkifli2, Ka-Kei Sam2
1Instituto de Acuicultura de Torre de la Sal (IATS), CSIC, Castellón, Spain.
Open biology
|September 3, 2025
概括
淡水多基生物如Namalycastis rhodochorde可以合成长链多不和脂肪酸 (LC-PUFA). 这一发现为水产养殖料中的鱼油提供了可持续的替代品.
科学领域:
- 生物化学和分子生物学
- 水产养殖和海洋生物技术
- 动物学和无脊椎动物生物学
背景情况:
- 水产养殖的可持续性受到鱼粉和鱼油减少的威胁,这些鱼类健康和产品质量至关重要的长链多不和脂肪酸 (LC-PUFA) 的来源.
- 海洋多基生物具有完整的LC-PUFA生物合成途径,但淡水物种仍未得到充分研究.
- 淡水环境可能需要在适应的多胞体中增强LC-PUFA生物合成,以克服饮食限制.
研究的目的:
- 为了研究淡水多叶藻 Namalycastis rhodochorde 的LC-PUFA 生合成能力.
- 识别和描述参与LC-PUFA合成的关键基因,包括延长酶 (Elovl) 和脱酶 (Fed, ω des).
- 评估N. rhodochorde作为水产养殖可持续生物质来源的潜力.
主要方法:
- 从N. rhodochorde中分离和表征延长酶和脱酶基因.
- 利用基于酵母的异质表达系统研究基因功能.
- 分析了PUFA合成途径中确定的基因的酶活性.
主要成果:
- 确定了三种能够使PUFA基质从C18延长到C22的Elovl基因 (Elovl2/5,Elovl4,Elovl1/7).
- 发现了两个Fed基因 (Fed1具有Δ5活性,Fed2具有双 Δ6/Δ8活性) 和两个 ω脱和酶 (一个 Δ12脱和一个 ω3脱和酶).
- 证实了N. rhodochorde合成LC-PUFA的酶能力,包括阿拉基酸 (ARA) 和eicosapentaenoic酸 (EPA).
结论:
- 纳马利卡斯蒂斯罗多科德具有与ARS和EPA一样重要的LC-PUFA的新合成基因机制.
- 这种淡水多种群体在可持续水产养殖料生产方面具有显著的潜力,减少了对海洋资源的依赖.
- 对N. rhodochorde种植的进一步研究可以支持环保的水产养殖实践.
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