Component of the ESCRT-II complex (endosomal sorting complex required for transport II), which is required for multivesicular body (MVB) formation and sorting of endosomal cargo proteins into MVBs. The ESCRT-II complex is probably involved in the recruitment of the ESCRT-III complex (By similarity). Component of the endosomal sorting required for transport complex II (ESCRT-II), composed of VPS22, VPS25 and VPS36. Belongs to the VPS36 family. Intron retention.