Scaffold Subunit Aalpha of PP2A Is Essential for Female Meiosis and Fertility in Mice1
نویسندگان
چکیده
منابع مشابه
Mps1 at kinetochores is essential for female mouse meiosis I.
In female meiosis, chromosome missegregations lead to the generation of aneuploid oocytes and can cause the development of trisomies or infertility. Because mammalian female meiosis I is error prone, the full functionality of control mechanisms, such as the spindle assembly checkpoint (SAC), has been put into question. The SAC monitors the correct orientation, microtubule occupancy and tension ...
متن کاملThe PP2A Inhibitor I2PP2A Is Essential for Sister Chromatid Segregation in Oocyte Meiosis II
Haploid gametes are generated through two consecutive meiotic divisions, with the segregation of chromosome pairs in meiosis I and sister chromatids in meiosis II. Separase-mediated stepwise removal of cohesion, first from chromosome arms and later from the centromere region, is a prerequisite for maintaining sister chromatids together until their separation in meiosis II [1]. In all model orga...
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Oocyte meiosis is a specialized cell cycle that gives rise to fertilizable haploid gametes and is precisely controlled in various dimensions. We recently found that E3 ubiquitin ligase CRL4 is required for female fertility by regulating DNA hydroxymethylation to maintain oocyte survival and to promote zygotic genome reprogramming. However, not all phenotypes of CRL4-deleted oocytes could be exp...
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Chromosome missegregation in germ cells is an important cause of unexplained infertility, miscarriages, and congenital birth defects in humans. However, the molecular defects that lead to production of aneuploid gametes are largely unknown. Cdc20, the activating subunit of the anaphase-promoting complex/cyclosome (APC/C), initiates sister-chromatid separation by ordering the destruction of two ...
متن کاملCancer-associated PP2A Aalpha subunits induce functional haploinsufficiency and tumorigenicity.
The introduction of SV40 small t antigen or the suppression of PP2A B56gamma subunit expression contributes to the experimental transformation of human cells. To investigate the role of cancer-associated PP2A Aalpha subunit mutants in transformation, we introduced several PP2A Aalpha mutants into immortalized but nontumorigenic human cells. These PP2A Aalpha mutants exhibited defects in binding...
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ژورنال
عنوان ژورنال: Biology of Reproduction
سال: 2014
ISSN: 0006-3363,1529-7268
DOI: 10.1095/biolreprod.114.120220