Final answer:
A vSNARE is a protein present in the membrane of transport vesicles, and it helps in the fusion of vesicles with the target membrane. A tSNARE is a protein present in the target membrane, and it interacts with vSNARE proteins to facilitate membrane fusion.
Step-by-step explanation:
A vSNARE (vesicle-SNARE) is a protein that is present in the membrane of transport vesicles. It helps in the fusion of vesicles with the target membrane. The structure of a vSNARE consists of a single transmembrane domain and a SNARE motif. The SNARE motif is a coiled-coil region that is responsible for the interaction with the complementary tSNARE (target-SNARE) proteins on the target membrane.
On the other hand, a tSNARE is a protein that is present in the target membrane. It interacts with vSNARE proteins on the vesicle membrane to facilitate membrane fusion. A tSNARE consists of three coiled-coil regions, each contributed by different proteins. The interaction between vSNARE and tSNARE proteins is crucial for the membrane fusion process.