Influences the subcellular localization patterns of other exocyst complex proteins (e.g. SEC5A, SEC15A, SEC15B and EXO84B) leading to their recruitment to exocyst, well-defined large punctate structures throughout the cytosol (PubMed:19895414, PubMed:24307681). Essential component for the formation and the recruitment of exocyst subunits to the exocyst-positive organelle (EXPO), a secreted double membrane structure also called extracellular exosome, that acts as a sequester for cytosolic proteins to release them into the apoplast (PubMed:21193573, PubMed:24307681). Component of the exocyst complex and of the exocyst-positive organelle (EXPO). Interacts with SEC6, SEC10A and SEC10B. Localized to well-defined large punctate structures throughout the cytosol (PubMed:19895414). Component of the secreted double membrane structure exocyst-positive organelle (EXPO). Locates to the plasma membrane as discrete punctae and secreted outside of the cells (PubMed:21193573). Expressed in roots, in the root-hair zone, both in root hair and nonhair cells. Unability to recruit a number of exocyst subunits to the exocyst-positive organelle (EXPO). Belongs to the EXO70 family.