EEA1 (Early Endosome Antigen 1) is a key regulator of endosomal trafficking and membrane transport processes. The protein binds phosphatidylinositol 3-phosphate-containing vesicles and participates in endosomal trafficking pathways 12. EEA1 mediates membrane translocation of receptors like EGFR from the Golgi compartment, working in coordination with Rab GTPases to regulate cellular transport 2. The protein plays crucial roles in endocytosis and phagosome maturation, as demonstrated by its involvement in CD36-mediated uptake of large molecules and proteolysis-targeting chimeras 1. EEA1 also participates in autophagy-related processes, including selective autophagy pathways that clear protein aggregates associated with neurodegeneration 3. Functionally, EEA1-positive endosomes serve as critical intermediates in the endolysosomal system, facilitating protein degradation and recycling in highly specialized cells like neurons 4. Disease relevance includes associations with allergic bronchopulmonary aspergillosis, where EEA1 mutations affect macrophage phagocytosis of Aspergillus fumigatus, leading to altered phagolysosome acidification 5. The protein's role in mitophagy regulation also contributes to cardiac hypertrophy induced by low-dose radiation 6.