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Translocation of endosomes along microtubules (MTs) from the cell periphery toward the juxtranuclear region proximal to MTOC is well established. During this translocation the radial MT system is believed to retain its organization. Here we demonstrate that epidermal growth factor receptor (EGFR) endocytosis in HeLa cells is accompanied by dramatic remodeling of the MT system. Synchronized endocytosis...
Numerous studies implicate proteasomes in the regulation of EGF receptor (EGFR) endocytosis on the basis of the ability of inhibitors to decrease EGFR degradation, but the exact mechanisms remain obscure. We demonstrated that EGFR itself is not a direct target for proteasome, since it is delivered to lysosomes intact. Evidence is presented that the inhibitory effect of MG132 on EGF degradation is...
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