Involved in the pathway that organizes the shaping and sizing of the prospore membrane (PSM) during sporulation. Required for the proper formation of the spindle pole body (SPB) outer plaque. May connect the outer plaque to the central plaque embedded in the nuclear envelope. Interacts directly with ADY3 and YOR129C. Interacts with ADY4. Probable component of a SPB complex composed of ADY3, SSP1, DON1, MPC54, SPO21/MPC70, NUD1 and CNM67. Localizes to the meiotic outer plaque of the SPB, at the end of the meiotic spindles. Meiosis-specific. Expressed from 3 to 9 hours after induction of sporulation. The length of the coiled coil are required to adjust the space between outer plaque and the central plaque. Phosphorylated in its N-terminal part.