Acts as a component of the NMS (Ndc80-MIND-Spc7) super complex which has a role in kinetochore function during late meiotic prophase and throughout the mitotic cell cycle. Acts as a component of the essential kinetochore-associated NDC80 complex, which is required for chromosome segregation and spindle checkpoint activity. Component of the NDC80 complex, which consists of ndc80, nuf2, spc24 and spc25. Can self-associate. Component of the NMS super complex which consists of mis12, mis13, mis14, ndc80, nnf1, nuf2, sos7, spc7, spc24 and spc25. Associated with kinetochores. Belongs to the SPC25 family.