Component of the exocyst complex involved in the docking of exocytic vesicles with fusion sites on the plasma membrane. In adipocytes, plays a crucial role in targeting SLC2A4 vesicle to the plasma membrane in response to insulin, perhaps directing the vesicle to the precise site of fusion. It is required for neuron survival and plays an essential role in cortical development (By similarity). The exocyst complex is composed of EXOC1, EXOC2, EXOC3, EXOC4, EXOC5, EXOC6, EXOC7 and EXOC8. Interacts with RAB11FIP3 (By similarity). Interacts with ARHQ in a GTP-dependent manner. Translocates, as a preformed complex with SEC6 and SEC8, to the plasma membrane in response to insulin through the activation of ARHQ (PubMed:12687004). Colocalizes with CNTRL/centriolin at the midbody ring (By similarity). The C-terminus is required for translocation to the plasma membrane. Belongs to the EXO70 family.