GONUTS has been updated to MW1.31 Most things seem to be working but be sure to report problems.

Have any questions? Please email us at ecoliwiki@gmail.com


Jump to: navigation, search


You don't have sufficient rights on this wiki to edit tables. Perhaps you need to log in. Changes you make in the Table editor will not be saved back to the wiki

See Help for Help on this wiki. See the documentation for how to use the table editor


Llano, E, Gómez, R, Gutiérrez-Caballero, C, Herrán, Y, Sánchez-Martín, M, Vázquez-Quiñones, L, Hernández, T, de Alava, E, Cuadrado, A, Barbero, JL, Suja, JA and Pendás, AM (2008) Shugoshin-2 is essential for the completion of meiosis but not for mitotic cell division in mice. Genes Dev. 22:2400-13


Shugoshin-2 (SGOL2) is one of the two mammalian orthologs of the Shugoshin/Mei-S322 family of proteins that regulate sister chromatid cohesion by protecting the integrity of the multiprotein cohesin complexes. This protective system is essential for faithful chromosome segregation during mitosis and meiosis, which is the physical basis of Mendelian inheritance. Regardless of its evolutionary conservation from yeast to mammals, little is known about the in vivo relevance and specific role that SGOL2 plays in mammals. Here we show that disruption of the gene encoding mouse SGOL2 does not cause any alteration in sister chromatid cohesion in embryonic cultured fibroblasts and adult somatic tissues. Moreover, mutant mice develop normally and survive to adulthood without any apparent alteration. However, both male and female Sgol2-deficient mice are infertile. We demonstrate that SGOL2 is necessary for protecting centromeric cohesion during mammalian meiosis I. In vivo, the loss of SGOL2 promotes a premature release of the meiosis-specific REC8 cohesin complexes from anaphase I centromeres. This molecular alteration is manifested cytologically by the complete loss of centromere cohesion at metaphase II leading to single chromatids and physiologically with the formation of aneuploid gametes that give rise to infertility.


PubMed PMC2532928 Online version:10.1101/gad.475308


Anaphase/physiology; Aneuploidy; Animals; Base Sequence; Cell Cycle Proteins/genetics; Cell Cycle Proteins/metabolism; Cell Cycle Proteins/physiology; Cells, Cultured; Centromere/physiology; Chromosomal Proteins, Non-Histone/metabolism; Female; Fibroblasts/cytology; Fibroblasts/metabolism; Infertility, Female/genetics; Infertility, Female/metabolism; Infertility, Male/genetics; Infertility, Male/metabolism; Male; Meiosis/physiology; Mice; Mice, Knockout; Mitosis/physiology; Molecular Sequence Data; Nuclear Proteins/metabolism; Phosphoproteins/metabolism; Promoter Regions, Genetic; Sister Chromatid Exchange; Spermatocytes/metabolism; Spermatocytes/ultrastructure