BAR domain protein involved in the control of meiotic nuclear division; coordinates meiosis with spore formation; subunit of the leading edge protein (LEP) complex (Ssp1-Ady3-Don1-Irc10) that forms a ring-like structure at the leading edge of the prospore membrane during meiosis II; BAR domain required for recruitment to the leading edge of the membrane where multimerization leads to LEP complex assembly; required for assembly of the leading edge coat, prospore membrane shaping and organization