The active zone protein CLA-1 (Clarinet) bridges two subsynaptic domains to regulate presynaptic sorting of ATG-9.

The active zone protein CLA-1 (Clarinet) bridges two subsynaptic domains to regulate presynaptic sorting of ATG-9.
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DOI:
10.1080/15548627.2023.2229227
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发表时间:
2023-10
期刊:
影响因子:
13.3
通讯作者:
Colon-Ramos, Daniel A.
Colon-Ramos, Daniel A.
中科院分区:
生物学1区
文献类型:
--
作者:
Xuan, Zhao;Colon-Ramos, Daniel A.

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在神经元突触中,自噬体生物发生通过 ATG-9 与活性依赖性突触小泡循环耦合。含有 ATG-9 的囊泡如何在突触前进行分类尚不清楚。我们对秀丽隐杆线虫神经元的单个突触进行了正向遗传筛选,寻找破坏 ATG-9 突触前定位的突变体,并鉴定了活性区蛋白 CLA-1 的长亚型(Clarinet;CLA-1 L)。我们发现破坏 CLA-1 L 会导致富含网格蛋白的含有 ATG-9 的囊泡异常积累。在 ATG-9 分选中,接头蛋白复合物和周围活性区的蛋白与 CLA-1 L 发生遗传相互作用。此外,在完整的突触小泡蛋白中没有观察到 cla-1(L) 突变体中 ATG-9 蛋白的表型,这表明调节含有 ATG-9 的囊泡和突触小泡的分选的不同机制。我们的研究结果揭示了活性区蛋白在 ATG-9 分选和突触前巨自噬/自噬中的新作用。
In neuronal synapses, autophagosome biogenesis is coupled with the activity-dependent synaptic vesicle cycle via ATG-9. How vesicles containing ATG-9 are sorted at the presynapse is unknown. We performed forward genetic screens at single synapses of C. elegans neurons for mutants that disrupt ATG-9 presynaptic localization, and identified the long isoform of the active zone protein CLA-1 (Clarinet; CLA-1 L). We find that disrupting CLA-1 L results in abnormal accumulation of ATG-9-containing vesicles enriched with clathrin. The adaptor protein complexes and proteins at the periactive zone genetically interact with CLA-1 L in ATG-9 sorting. Moreover, the phenotype of the ATG-9 protein in cla-1(L) mutants was not observed for integral synaptic vesicle proteins, suggesting distinct mechanisms that regulate sorting of ATG-9-containing vesicles and synaptic vesicles. Our findings reveal novel roles for active zone proteins in the sorting of ATG-9 and in presynaptic macroautophagy/autophagy.
DOI: 10.1371/journal.pbio.3002030
发表时间: 2023-04
期刊: PLoS biology
影响因子: 9.8
作者:
通讯作者: --