Abstract:
:Epidermal growth factor (EGF) activates the EGF receptor (EGFR) and stimulates its internalization and trafficking to lysosomes for degradation. However, a percentage of EGFR undergoes ligand-independent endocytosis and is rapidly recycled back to the plasma membrane. Importantly, alterations in EGFR recycling are a common hallmark of cancer, and yet, our understanding of the machineries controlling the fate of endocytosed EGFR is incomplete. Intersectin-s is a multi-domain adaptor protein that is required for internalization of EGFR Here, we discover that intersectin-s binds DENND2B, a guanine nucleotide exchange factor for the exocytic GTPase Rab13, and this interaction promotes recycling of ligand-free EGFR to the cell surface. Intriguingly, upon EGF treatment, DENND2B is phosphorylated by protein kinase D and dissociates from intersectin-s, allowing for receptor targeting to degradation. Our study thus reveals a novel mechanism controlling the fate of internalized EGFR with important implications for cancer.
journal_name
EMBO Repjournal_title
EMBO reportsauthors
Ioannou MS,Kulasekaran G,Fotouhi M,Morein JJ,Han C,Tse S,Nossova N,Han T,Mannard E,McPherson PSdoi
10.15252/embr.201744034subject
Has Abstractpub_date
2017-12-01 00:00:00pages
2119-2130issue
12eissn
1469-221Xissn
1469-3178pii
embr.201744034journal_volume
18pub_type
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