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Cell Rep ; 43(1): 113603, 2024 01 23.
Artículo en Inglés | MEDLINE | ID: mdl-38117650

RESUMEN

The epidermal growth factor receptor (EGFR) is a receptor tyrosine kinase with important roles in many cellular processes as well as in cancer and other diseases. EGF binding promotes EGFR dimerization and autophosphorylation through interactions that are well understood structurally. How these dimers relate to higher-order EGFR oligomers seen in cell membranes, however, remains unclear. Here, we used single-particle tracking (SPT) and Förster resonance energy transfer imaging to examine how each domain of EGFR contributes to receptor oligomerization and the rate of receptor diffusion in the cell membrane. Although the extracellular region of EGFR is sufficient to drive receptor dimerization, we find that the EGF-induced EGFR slowdown seen by SPT requires higher-order oligomerization-mediated in part by the intracellular tyrosine kinase domain when it adopts an active conformation. Our data thus provide important insight into the interactions required for higher-order EGFR assemblies involved in EGF signaling.


Asunto(s)
Factor de Crecimiento Epidérmico , Receptores ErbB , Factor de Crecimiento Epidérmico/farmacología , Factor de Crecimiento Epidérmico/metabolismo , Receptores ErbB/metabolismo , Membrana Celular/metabolismo , Fosforilación , Transducción de Señal
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