PNAS:看饱和脂肪酸如何扰动你的内质网

2017-12-02 海北 MedSci原创

在热力学平衡状态下,膜相行为的特征在体外模型中已经得到了很好的表征。然而,生物膜与其体外对应物之间存在广泛观察到的差异,这强调了非平衡因素,包括脂质分子的流入和流出,对于生物膜的影响。

在热力学平衡状态下,膜相行为的特征在体外模型中已经得到了很好的表征。然而,生物膜与其体外对应物之间存在广泛观察到的差异,这强调了非平衡因素,包括脂质分子的流入和流出,对于生物膜的影响。内质网(ER)是细胞内最大的细胞膜系统,也是负责脂质合成的具有最高代谢活性的细胞器。然而,至今为止,非平衡代谢活性如何调节ER膜相还没有被研究清楚。

近日,来自哥伦比亚大学的研究人员探究了脂质代谢背景下功能性ER的相行为。其利用先进的振动成像技术,即受激拉曼散射显微镜,对内质网进行了观察。研究人员发现,棕榈酸酯(一种普遍存在的饱和脂肪酸(SFA))的代谢可能驱动固体样区域从大致均匀流体的ER膜上分离。该现象以前没有被发现过。

各种脂肪酸诱导固相的潜力可以通过其主要代谢物的转变温度来预测。研究人员还观察到了饱和脂肪酸和不饱和脂肪酸之间的相互作用。

因此,该项研究通过强调活细胞的非平衡代谢状态揭示了细胞膜生物物理学。


原始出处:

Yihui Shen et al. Metabolic activity induces membrane phase separation in endoplasmic reticulumProceedings of the National Academy of Sciences, 2017; 201712555 DOI: 10.1073/pnas.1712555114


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    2018-09-16 drwjr
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    2017-12-02 sunfeifeiyang

    学习

    0

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    2017-12-02 Y—xianghai

    学习了新知识

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    2017-12-02 Y—xianghai

    学习了新知识

    0

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    2017-12-02 186****0580(小山羊)

    学习了谢谢了

    0

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