YKT6 is a soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) that plays a central role in membrane fusion in eukaryotic cells. It is primarily localized in the cytoplasm and, through its unique dual lipidation modification (palmitoylation and farnesylation), can associate with various organelle membranes, such as the Golgi apparatus, endosomes, and vesicles. By forming stable trans-SNARE complexes with other SNARE proteins (e.g., Syntaxin and SNAP-25 family members) on target membranes, YKT6 provides the driving force for membrane fusion, thereby facilitating intracellular trafficking. This protein is essential for maintaining organelle integrity, autophagy, and secretory pathways. Studies have shown that dysfunction of YKT6 is associated with various diseases, including cancer, neurodegenerative disorders, and metabolic abnormalities, making it a potential target for drug development.