Plays a role in meiosis and sporulation. Interacts with myo1 and pik1. Accumulates at the cell poles in interphase cells and at the medial septation site in post-mitotic cells, colocalizing with myo1 and F-actin patches. During the mating process, a single dot is detected a the tip of the mating projection. During meiosis I, dots disperse into the cell periphery and the cytoplasm. At metaphase II, intense signals appear near meu14 rings which are formed at the leading edge of expanding forespore membranes. Localization is dependent upon myo1 with the exception of the localization to mating projections. Five-fold increase in meiosis in mei4-dependent manner. Cells are viable and complete sporulation normally at 28 degrees Celsius, but form four-spored asci poorly at 34 degrees Celsius. In sporulation-defective cells, the forespore membrane (FSM) is formed abnormally and F-actin localization is aberrant. Only fragmented or anucleated FSMs are formed and F-actin dots remain at peripheral regions of mother cells even during meiosis II. Sporulation defect is alleviated by overexpressing myo1 from which IQ domain is deleted. Belongs to the calmodulin family.