A phosphatidylinositol 4,5-bisphosphate redistribution-based sensing mechanism initiates a phagocytosis programing.

A phosphatidylinositol 4,5-bisphosphate redistribution-based sensing mechanism initiates a phagocytosis programing.
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基于磷脂酰肌醇 4,5-二磷酸重新分布的传感机制启动吞噬程序

DOI:
10.1038/s41467-018-06744-7
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发表时间:
2018-10-15
影响因子:
16.6
通讯作者:
Shi Y
Shi Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Mu L;Tu Z;Miao L;Ruan H;Kang N;Hei Y;Chen J;Wei W;Gong F;Wang B;Du Y;Ma G;Amerein MW;Xia T;Shi Y

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吞噬作用是最早的细胞功能之一,大约在20亿年前发展起来。虽然基于FcR的吞噬信号被充分研究,但它如何起源于古老的吞噬作用尚不清楚。脂质再分布上调吞噬程序重演基于FcR的吞噬作用,完全依赖于Src家族激酶、Syk和磷酸肌醇3-激酶(PI 3 K)。在这里,我们表明,在吞噬细胞中,一个非典型的ITAM序列在古老的膜锚蛋白膜突蛋白转导信号没有受体激活。通过固体结构结合产生的质膜变形在接触位点产生磷脂酰肌醇4,5-二磷酸(PIP 2)积累,其结合膜突蛋白FERM结构域并通过ITAM基序将Syk重新定位于膜。系统发育分析使用PI 3 K和Syk将这种信号传导追溯到8亿年前,比免疫受体信号传导更早。所提出的固体结构吞噬作用的一般模型意味着预先存在的基于脂质再分布的激活平台收集细胞内信号传导组分以用于免疫受体的出现。
Phagocytosis is one of the earliest cellular functions, developing approximately 2 billion years ago. Although FcR-based phagocytic signaling is well-studied, how it originated from ancient phagocytosis is unknown. Lipid redistribution upregulates a phagocytic program recapitulating FcR-based phagocytosis with complete dependence on Src family kinases, Syk, and phosphoinositide 3-kinases (PI3K). Here we show that in phagocytes, an atypical ITAM sequence in the ancient membrane anchor protein Moesin transduces signal without receptor activation. Plasma membrane deformation created by solid structure binding generates phosphatidylinositol 4,5-bisphosphate (PIP2) accumulation at the contact site, which binds the Moesin FERM domain and relocalizes Syk to the membrane via the ITAM motif. Phylogenic analysis traces this signaling using PI3K and Syk to 0.8 billion years ago, earlier than immune receptor signaling. The proposed general model of solid structure phagocytosis implies a preexisting lipid redistribution-based activation platform collecting intracellular signaling components for the emergence of immune receptors.
DOI: 10.1038/srep06056
发表时间: 2014-09-10
期刊: Scientific reports
影响因子: 4.6
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发表时间: 2014-06-09
期刊: DEVELOPMENTAL CELL
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发表时间: 2009-02-09
期刊: The Journal of cell biology
影响因子: --
作者:
Hao JJ;Liu Y;Kruhlak M;Debell KE;Rellahan BL;Shaw S
通讯作者: Shaw S
DOI: 10.1074/jbc.m111.304881
发表时间: 2012-05-11
影响因子: 4.8
作者:
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通讯作者: Shaw, Stephen