Involved in the pathway that organizes the shaping and sizing of the prospore membrane (PSM) during sporulation. Interacts directly with SPO21/MPC70, NUD1, SPO74 and SPC42. Probable component of a spindle pole body (SPB) complex composed of ADY3, SSP1, DON1, MPC54, SPO21/MPC70, NUD1 and CNM67. Localizes to the ends of spindle microtubules in cells in meiosis. Localizes to all four spindle pole bodies during meiosis, ADY1 is required for this localization. Meiosis-specific. Expressed during meiosis II, from 3 to 9 hours after induction of sporulation. Not expressed during mitosis.