Involved in sporulation. Plays a significant role in modification of the spindle pole body prior to spore formation and is required for initiating forespore membrane formation. Assists in the localization of spo13 to the outer surface of the SPB. Interacts with spo13 and spo15. Induced during meiosis by the transcription factor mei4. Protein levels rapidly increase during meiosis and then decline. The sequence is 100 percent identical to the C-terminus of vps13b. Belongs to the VPS13 family.