Component of the ESCRT-0 complex which is the sorting receptor for ubiquitinated cargo proteins at the multivesicular body (MVB) and recruits ESCRT-I to the MVB outer membrane. Component of the ESCRT-0 complex composed of hse1 and vps27. The FYVE domain is involved in the binding to phosphatidylinositol 3-phosphate (PtdIns(3)P) which is required for the association to endosomal membranes. Both IUM domains are necessary for efficient binding to ubiquitin. Belongs to the VPS27 family.