V-SNARE that mediates vesicle transport pathways through interactions with t-SNAREs on the target membrane. These interactions are proposed to mediate aspects of the specificity of vesicle trafficking and to promote fusion of the lipid bilayers. Component of the SNARE complex composed of syn7A, syn8A, vamp7A and vti1A. Expressed during development. Expression levels peak at 2 hours, after which they decrease steadily until culmination. Levels increase after 18 hours of development. Belongs to the VTI1 family.