In the budding yeast Saccharomyces cerevisiae, sister chromatid co-orientation in meiosis I depends on the four-protein monopolin complex (Mam1, Csm1, Lrs4, and Hrr25/casein kinase 1), which localizes to centromeres from meiotic prophase through metaphase I. Csm1 and Lrs4, form a complex that resides in the nucleolus during interphase and relocalizes to centromeres during meiotic prophase, accompanied by phosphorylation of Lrs4. This is the N-terminal domain of Csm1 which forms a coiled-coil [1].

1: The monopolin complex crosslinks kinetochore components to regulate chromosome-microtubule attachments. Corbett KD, Yip CK, Ee LS, Walz T, Amon A, Harrison SC; Cell. 2010;142:556-567. PMID:20723757