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Reference: Brito IL, et al. (2010) Condensins promote coorientation of sister chromatids during meiosis I in budding yeast. Genetics 185(1):55-64

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Abstract

The condensin complex is a key determinant of higher-ordered chromosome structure. We show here that the complex is also important for the correct alignment of chromosomes on the meiosis I spindle. Unlike during mitosis and meiosis II, when sister chromatids attach to microtubules emanating from opposite spindle poles (bi-orientation), accurate meiosis I chromosome segregation requires that sister chromatids attach to microtubules emanating from the same spindle pole (co-orientation). The monopolin complex, consisting of Lrs4, Csm1 and the meiosis-specific component Mam1, brings about meiosis I co-orientation. We find that in the absence of functional condensin complexes, a fraction of sister kinetochores bi-orient on the meiosis I spindle and association of the monopolin complex subunit Mam1 with kinetochores is decreased. Our studies uncover a new locus-specific effect of the condensin complex.

Reference Type
Journal Article
Authors
Brito IL, Yu HG, Amon A
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