The EGFR odyssey - from activation to destruction in space and time
- PMID: 29180516
- DOI: 10.1242/jcs.209197
The EGFR odyssey - from activation to destruction in space and time
Abstract
When cell surface receptors engage their cognate ligands in the extracellular space, they become competent to transmit potent signals to the inside of the cell, thereby instigating growth, differentiation, motility and many other processes. In order to control these signals, activated receptors are endocytosed and thoroughly curated by the endosomal network of intracellular vesicles and proteolytic organelles. In this Review, we follow the epidermal growth factor (EGF) receptor (EGFR) from ligand engagement, through its voyage on endosomes and, ultimately, to its destruction in the lysosome. We focus on the spatial and temporal considerations underlying the molecular decisions that govern this complex journey and discuss how additional cellular organelles - particularly the ER - play active roles in the regulation of receptor lifespan. In summarizing the functions of relevant molecules on the endosomes and the ER, we cover the order of molecular events in receptor activation, trafficking and downregulation, and provide an overview of how signaling is controlled at the interface between these organelles.
Keywords: EGFR; ER; Endosomes; Rab5; Rab7; Signaling.
© 2017. Published by The Company of Biologists Ltd.
Conflict of interest statement
Competing interestsThe authors declare no competing or financial interests.
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