Cancer Prevention and Research Institute of Texas (CPRIT)
RR160023
米国
Cancer Prevention and Research Institute of Texas (CPRIT)
RR230050
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM122480
米国
Welch Foundation
F-1515
米国
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2025 タイトル: Structure and organization of full-length epidermal growth factor receptor in extracellular vesicles by cryo-electron tomography. 著者: Monica Gonzalez-Magaldi / Anuradha Gullapalli / Ophelia Papoulas / Chang Liu / Adelaide Y-H Leung / Luqiang Guo / Axel F Brilot / Edward M Marcotte / Zunlong Ke / Daniel J Leahy / 要旨: We report here transport of full-length epidermal growth factor receptor (EGFR), Insulin Receptor, 7-pass transmembrane receptor Smoothened, and 13-pass Sodium-iodide symporter to extracellular ...We report here transport of full-length epidermal growth factor receptor (EGFR), Insulin Receptor, 7-pass transmembrane receptor Smoothened, and 13-pass Sodium-iodide symporter to extracellular vesicles (EVs) for structural and functional studies. Mass spectrometry confirmed the transported proteins are the most abundant in EV membranes, and the presence of many receptor-interacting proteins in EVs demonstrates their utility for characterizing membrane protein interactomes. Cryo-electron tomography of EGFR-containing EVs reveals that EGFR forms clusters in both the presence and absence of EGF with a ~3 nm gap between the inner membrane and cytoplasmic density. EGFR extracellular region (ECR) dimers do not form regular arrays in these clusters. Subtomogram averaging of the 150 kDa EGF-bound EGFR ECR dimer yielded a 15 Å map into which the crystal structure of the ligand-bound EGFR ECR dimer fits well. These findings refine our understanding of EGFR activation, clustering, and signaling and establish EVs as a versatile platform for structural and functional characterization of human membrane proteins in cell-derived membranes.