FCHO2 (FCH and mu domain containing endocytic adaptor 2) is a membrane-binding protein that functions as a critical early-stage regulator of clathrin-mediated endocytosis (CME). The protein contains an F-BAR domain that enables both membrane binding and curvature generation, with specific lipid-binding preferences for phosphatidylserine and phosphoinositides, particularly PI(4,5)P2 1. FCHO2 assembles into ring-like patches at the plasma membrane where it recruits and organizes essential endocytic proteins including AP-2 adaptors, EPS15, and dynamin2 2. Mechanistically, FCHO2's BAR domain-generated membrane curvature drives multiple functional outcomes: it promotes PI(4,5)P2 clustering to enhance clathrin assembly 1, couples endocytic pit growth and lifetime through controlled membrane invagination 3, and activates the Nedd4L ubiquitin ligase for selective cargo sorting during endocytosis 4. FCHO2 mediates both AP-2-dependent transferrin receptor endocytosis and AP-2-independent LDL receptor internalization. Beyond canonical endocytic functions, dysregulated FCHO2 expression associates with disease: elevated FCHO2 correlates with poor pancreatic cancer survival 5, and circular RNA circFCHO2 promotes airway remodeling in COPD through indirect NF-κB pathway activation 6. These findings establish FCHO2 as a multifunctional endocytic organizer whose membrane-sculpting capacity integrates cargo selection with vesicle biogenesis.