Control of lysosomal-mediated cell death by the pH-dependent calcium channel RECS1.

Control of lysosomal-mediated cell death by the pH-dependent calcium channel RECS1.
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DOI:
10.1126/sciadv.abe5469
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发表时间:
2021-11-12
期刊:
影响因子:
13.6
通讯作者:
Hetz C
Hetz C
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Pihán P;Lisbona F;Borgonovo J;Edwards-Jorquera S;Nunes-Hasler P;Castillo K;Kepp O;Urra H;Saarnio S;Vihinen H;Carreras-Sureda A;Forveille S;Sauvat A;De Giorgis D;Pupo A;Rodríguez DA;Quarato G;Sagredo A;Lourido F;Letai A;Latorre R;Kroemer G;Demaurex N;Jokitalo E;Concha ML;Glavic Á;Green DR;Hetz C

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RECS1 是 TMBIM 家族的成员,在经历溶酶体应激的细胞中触发溶酶体膜通透化。程序性细胞死亡由激活信号和抑制信号之间的平衡调节。在这里,我们确定了 RECS1(对离心力和剪切应力响应 1)[也称为 TMBIM1(包含 1 的跨膜 BAX 抑制剂基序)] 作为 TMBIM 家族的促凋亡成员。与 TMBIM 家族的其他蛋白相比,RECS1 表达通过经典线粒体凋亡途径诱导细胞死亡。无偏见的筛选表明 RECS1 使细胞对溶酶体扰动敏感。 RECS1 定位于溶酶体,调节溶酶体的酸化和钙含量,引发溶酶体膜透化。结构模型和电生理学研究表明 RECS1 是一种 pH 调节的钙通道,这是触发细胞死亡所必需的活性。在果蝇和斑马鱼模型中,RECS1 还使整个动物对体内压力敏感。我们的结果揭示了 RECS1 作为 TMBIM 家族的促凋亡成分的一种意想不到的功能,可以在溶酶体中启动细胞死亡程序。
RECS1, a member of the TMBIM family, triggers lysosomal membrane permeabilization in cells undergoing lysosomal stress. Programmed cell death is regulated by the balance between activating and inhibitory signals. Here, we have identified RECS1 (responsive to centrifugal force and shear stress 1) [also known as TMBIM1 (transmembrane BAX inhibitor motif containing 1)] as a proapoptotic member of the TMBIM family. In contrast to other proteins of the TMBIM family, RECS1 expression induces cell death through the canonical mitochondrial apoptosis pathway. Unbiased screening indicated that RECS1 sensitizes cells to lysosomal perturbations. RECS1 localizes to lysosomes, where it regulates their acidification and calcium content, triggering lysosomal membrane permeabilization. Structural modeling and electrophysiological studies indicated that RECS1 is a pH-regulated calcium channel, an activity that is essential to trigger cell death. RECS1 also sensitizes whole animals to stress in vivo in Drosophila melanogaster and zebrafish models. Our results unveil an unanticipated function for RECS1 as a proapoptotic component of the TMBIM family that ignites cell death programs at lysosomes.
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