VTA1 (vesicle trafficking 1) functions as a critical cofactor for the VPS4 ATPase in the endosomal sorting complex required for transport (ESCRT) system, which mediates membrane remodeling processes 1. The protein contains a Vps4 stimulatory element (VSE) that contacts specific regions of VPS4 (α7 and α9 helices) to enhance ATP hydrolysis and promote ESCRT-III complex disassembly 2. VTA1 plays essential roles in multiple cellular processes including multivesicular body sorting, cytokinetic abscission, viral budding, and membrane repair 13. In cytokinesis, VTA1 specifically regulates VPS4A-mediated abscission by disrupting VPS4A-ANCHR interactions, with VTA1 depletion accelerating the abscission process 4. The protein demonstrates anti-viral properties, as evidenced by its identification as a host factor controlling SARS-CoV-2 infection through integrated multi-omics analyses 5. Clinically, VTA1 shows potential as a prognostic biomarker, with high expression correlating with poor outcomes in lung adenocarcinoma patients and association with advanced tumor stages 6. Additionally, genetic variants near VTA1 have been associated with lacunar stroke risk through genome-wide association studies 7.