Attachment of sister chromatids to microtubules in the fission yeast Schizosaccharomyces pombe is mediated by the kinetochore complex NMS (Ndc80-MIND-Spc7). Sos7 is a component of the MIND complex and is required for kinetochore targeting of Spc7 [1]. This fungal kinetochore family represented by Sos7 is not present in yeasts belonging to the Saccharomyces complex. Instead, these organisms have proteins homologous to the S. cerevisiae Spc105 interaction partner Kre28.

1: Sos7, an essential component of the conserved Schizosaccharomyces pombe Ndc80-MIND-Spc7 complex, identifies a new family of fungal kinetochore proteins. Jakopec V, Topolski B, Fleig U; Mol Cell Biol. 2012;32:3308-3320. PMID:22711988