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通过NADK介导的林合成增强了剃须刀的高盐度耐受性

Ruiqi Liu¹, Min Deng¹, Na Zhang¹

¹Shanghai Collaborative Innovation for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China.

Comparative biochemistry and physiology. Part A, Molecular & integrative physiology

|February 26, 2024

概括

纳德激酶 (NADK) 显著增加了面临高盐度的剃须刀的普罗林产量. 这一过程有助于贝类保持透平衡,并在充满挑战的海洋环境中生存.

科学领域:

海洋生物学海洋生物学
生物化学生物化学
分子生物学分子生物学

背景情况:

欧线生物使用有机结体来维持结平衡.
在高盐度下,proline对于海洋贝类的度调节至关重要.
纳德激酶 (NADK) 参与了透应激期间的NADP (H) 合成,但其在贝类proline生物合成中的作用尚不清楚.

研究的目的:

为了研究NAD激酶 (NADK) 在剃须刀 (Sinonovacula constricta) 在奥斯莫斯压力下对普罗林生物合成的作用.
了解NADK如何调节林合成,以应对高盐度的条件.

主要方法:

在超的条件下检查了剃须的状组织中的ScNADK基因表达.
利用dsRNA干扰来降低状组织中的ScNADK表达.
评估的普罗林含量和关键普罗林生物合成酶基因 (P5CS,P5CR) 的表达.

主要成果:

过高盐度的条件显著增加了状组织中的ScNADK表达.
击败ScNADK导致proline含量显著下降 (P<0.01).
此外,ScNADK knockdown还降低了proline合成酶基因P5CS和P5CR的表达,这表明它在谷氨酸胺路径中发挥了作用. 当谷氨酸氨酸通路受到损害时,剃刀转向了甲素作为基质.
外源性普罗林的使用增强了细胞活力,并减少了结组织的亡.

结论:

在高度压力期间,ScNADK在提高剃须刀的普罗林产量方面发挥着关键作用.
这种NADK介导的プロ林合成对于剃须刀来说是必不可少的,以适应环境中的盐度波动.
这些发现阐明了海洋贝类中透调节的关键分子机制.

关键词:

欧线 (Euryhaline) 是一种线.这就是NADK NADK NADK.氧化物溶解物 (osmolytes) 是一种溶解物.氨酸 (proline) 是一种氨酸.没有新冠状病毒的限制.

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