SNX16 (sorting nexin 16) is a membrane trafficking protein that regulates intracellular transport and endosomal sorting processes. SNX16 localizes to early and recycling endosomes via its PX domain, which binds phosphatidylinositol 3-phosphate in a PI3K-dependent manner 1. The protein plays crucial roles in EGFR trafficking, promoting receptor degradation and regulating EGF-induced signaling pathways including ERK and serum response element activation 1. Recent studies reveal SNX16's involvement in autophagosomal component recycling (ACR), where it functions as part of the recycler complex and is regulated by mTORC1 phosphorylation 2. SNX16 also facilitates E-cadherin transport to the lateral plasma membrane through cooperation with Rab7 and Rab11 systems 3. In pathological contexts, SNX16 exhibits tissue-specific effects: it promotes cardiac hypertrophy through EGFR transactivation 4, drives colorectal cancer progression via the eEF1A2/c-Myc axis 5, and contributes to pre-eclampsia pathogenesis by inhibiting trophoblast migration 6. Additionally, SNX16 controls neuronal endosomal distribution through higher-order assembly mechanisms involving its coiled-coil domain 7. These findings establish SNX16 as a multifunctional regulator of membrane trafficking with significant implications for cellular signaling, autophagy, and disease pathogenesis.