Receptor-like role for PQLC2 amino acid transporter in the lysosomal sensing of cationic amino acids.
Receptor-like role for PQLC2 amino acid transporter in the lysosomal sensing of cationic amino acids.
复制标题
PQLC2 氨基酸转运蛋白在阳离子氨基酸的溶酶体传感中的受体样作用。
DOI：
10.1073/pnas.2014941118
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发表时间：
2021
影响因子：
11.1
通讯作者：
Ferguson,ShawnM
中科院分区：
文献类型：
--
作者：
Talaia,Gabriel;Amick,Joseph;Ferguson,ShawnM
PQLC2, a lysosomal cationic amino acid transporter, also serves as a sensor that responds to scarcity of its substrates by recruiting a protein complex composed of C9orf72, SMCR8, and WDR41 to the surface of lysosomes. This protein complex controls multiple aspects of lysosome function. Although it is known that this response to changes in cationic amino acid availability depends on an interaction between PQLC2 and WDR41, the underlying mechanism for the regulated interaction is not known. In this study, we present evidence that the WDR41–PQLC2 interaction is mediated by a short peptide motif in a flexible loop that extends from the WDR41 β-propeller and inserts into a cavity presented by the inward-facing conformation of PQLC2. The data support a transceptor model wherein conformational changes in PQLC2 related to substrate transport regulate the availability of the WDR41-binding site on PQLC2 and mediate recruitment of the WDR41-SMCR8-C9orf72 complex to the surface of lysosomes.
