A role of GCC88 in the retrograde transport of CI-M6PR and the maintenance of lysosomal activity.
[No authors listed]
摘要
GCC88 is a golgin coiled-coil protein at the trans-Golgi (TGN) that functions as a tethering factor for the endosome-derived retrograde transport vesicles. Here, we demonstrate that GCC88 is required for the endosome-to-TGN retrograde transport of the cation-independent mannose 6-phosphate receptor (CI-M6PR). The knockout of GCC88 perturbs the retrieval of CI-M6PR and decreases its cellular level at the steady state, which causes the improper processing of newly synthesized cathepsin-D, a lysosomal hydrolase dependent on CI-M6PR for its delivery to lysosomes. At the whole cell level, the knockout of GCC88 reduces the lysosomal proteolytic capacity but does not impair of the efficiency of autophagy within these cells.
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基因功能
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原始数据
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文献解读
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