MYB‐like transcription factor NoPSR1 is crucial for membrane lipid remodeling under phosphate starvation in the oleaginous microalga Nannochloropsis oceanica,FEBS Letters

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MYB‐like transcription factor NoPSR1 is crucial for membrane lipid remodeling under phosphate starvation in the oleaginous microalga Nannochloropsis oceanica
FEBS Letters ( IF 3.0 ) Pub Date : 2020-09-01 , DOI: 10.1002/1873-3468.13902
Hiroki Murakami ₁ , Natsue Kakutani ₁ , Yunato Kuroyanagi ₁ , Masako Iwai ₁ , Koichi Hori ₁ , Mie Shimojima ₁ , Hiroyuki Ohta ₁

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Membrane lipid remodeling under phosphate (Pi) limitation, a process that replaces structural membrane phospholipids with nonphosphorus lipids, is a widely observed adaptive response in plants and algae. Here, we identified the transcription factor phosphorus starvation response 1 (NoPSR1) as an indispensable player for regulating membrane lipid conversion during Pi starvation in the microalga Nannochloropsis oceanica. Knocking out NoPSR1 scarcely perturbed membrane lipid composition under Pi‐sufficient conditions but significantly impaired dynamic alteration in membrane lipids during Pi starvation. In contrast, the absence of NoPSR1 led to no obvious change in cell proliferation or storage lipid accumulation under either nutrient‐sufficient or Pi‐deficient conditions. Our results demonstrate a key factor controlling the membrane lipid profile during the Pi starvation response in N. oceanica.

中文翻译：

MYB 样转录因子 NoPSR1 对于含油微藻 Nannochloropsis Oceanica 磷酸盐饥饿下的膜脂重塑至关重要

磷酸盐 (Pi) 限制下的膜脂质重塑是一种用非磷脂质取代结构膜磷脂的过程，是植物和藻类中广泛观察到的适应性反应。在这里，我们将转录因子磷饥饿反应 1 (NoPSR1) 鉴定为在微藻 Nannochloropsis 海洋中调节磷饥饿期间膜脂转化的不可或缺的参与者。在 Pi 充足的条件下，敲除 NoPSR1 几乎不会扰乱膜脂组成，但在 Pi 饥饿期间会显着削弱膜脂的动态变化。相比之下，在营养充足或缺磷条件下，NoPSR1 的缺失导致细胞增殖或储存脂质积累没有明显变化。

更新日期：2020-09-01

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