Component of the exocyst complex involved in the docking of exocytic vesicles with fusion sites on the plasma membrane. The exocyst complex is composed of EXOC1, EXOC2, EXOC3, EXOC4, EXOC5, EXOC6, EXOC7 and EXOC8 (By similarity). Interacts with BIRC6/bruce (By similarity). Interacts with MYRIP. Interacts with SH3BP1; required for the localization of both SH3BP1 and the exocyst to the leading edge of migrating cells (By similarity). Interacts with SLC6A9 (By similarity). Colocalizes with CNTRL/centriolin at the midbody ring (By similarity). Localizes at the leading edge of migrating cells (By similarity). Expressed in the striatum (at protein level). Belongs to the SEC8 family.