SNAP29 (F7Y8J) Rabbit Monoclonal Antibody #53186

Synaptosomal-associated protein 29 (SNAP29) is a versatile member of the soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) family, and functions as a Q-SNARE, typically providing two of the four alpha-helices required to form the SNARE complex that drives membrane fusion (1). Unlike other family members, which are tethered to specific membranes via fatty acid chains, SNAP29 is primarily a soluble protein and can act as a promiscuous mediator of membrane fusion across multiple cellular pathways (2). SNAP29 plays its most critical role in autophagy by forming a complex with Syntaxin 17 (STX17) and VAMP8 to mediate autophagosome-lysosome fusion (3). SNAP29 also controls protein transport between the endoplasmic reticulum (ER) and Golgi apparatus, regulates endocytic recycling, and maintains proper Golgi morphology (1,4). Additionally, SNAP29 promotes accurate chromosome segregation (5) and has been implicated in the secretion of small extracellular vesicles or exosomes, suggesting a role in intercellular communication (4). Homozygous loss-of-function mutations in the SNAP29 gene are linked to CEDNIK (CErebral Dysgenesis, Neuropathy, Ichthyosis, and palmoplantar Keratoderma) syndrome (6), and decreased levels of neuronal SNAP29 may contribute to impaired autophagic/lysosomal function and altered synaptic protein homeostasis in neurodegenerative conditions (7,8). Recent studies have shown that the SARS-CoV-2 ORF7a protein downregulates SNAP29 to prevent autophagosome-lysosome fusion and promote viral replication (9).