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Sororin loads to the synaptonemal complex central region independently of meiotic cohesin complexes

AuthorsGómez, Rocío; Felipe-Medina, Natalia ; Ruiz-Torres, Miguel; Berenguer, Inés; Viera, Alberto; Pérez, Sara; Barbero, José Luis ; Llano, Elena ; Fukuda, Tomoyuki; Alsheimer, Manfred; Pendás, Alberto M. ; Losada, Ana; Suja, José A.
Cohesin complex
Synaptonemal complex
Issue Date7-Mar-2016
PublisherEuropean Molecular Biology Organization
CitationEMBO Reports 17(5): 695-707 (2016)
AbstractThe distribution and regulation of the cohesin complexes have been extensively studied during mitosis. However, the dynamics of their different regulators in vertebrate meiosis is largely unknown. In this work, we have analyzed the distribution of the regulatory factor Sororin during male mouse meiosis. Sororin is detected at the central region of the synaptonemal complex during prophase I, in contrast with the previously reported localization of other cohesin components in the lateral elements. This localization of Sororin depends on the transverse filaments protein SYCP1, but not on meiosis-specific cohesin subunits REC8 and SMC1b. By late prophase I, Sororin accumulates at centromeres and remains there up to anaphase II. The phosphatase activity of PP2A seems to be required for this accumulation. We hypothesize that Sororin function at the central region of the synaptonemal complex could be independent on meiotic cohesin complexes. In addition, we suggest that Sororin participates in the regulation of centromeric cohesion during meiosis in collaboration with SGO2-PP2A.
Publisher version (URL)http://dx.doi.org/ 10.15252/embr.201541060
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