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The subcortical maternal complex modulates the cell cycle during early mammalian embryogenesis via 14-3-3
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The subcortical maternal complex modulates the cell cycle during early mammalian embryogenesis via 14-3-3
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Journal Article
The subcortical maternal complex modulates the cell cycle during early mammalian embryogenesis via 14-3-3
2024
Overview
The subcortical maternal complex (SCMC) is essential for safeguarding female fertility in mammals. Assembled in oocytes, the SCMC maintains the cleavage of early embryos, but the underlying mechanism remains unclear. Here, we report that 14-3-3, a multifunctional protein, is a component of the SCMC. By resolving the structure of the 14-3-3-containing SCMC, we discover that phosphorylation of TLE6 contributes to the recruitment of 14-3-3. Mechanistically, during maternal-to-embryo transition, the SCMC stabilizes 14-3-3 protein and contributes to the proper control of CDC25B, thus ensuring the activation of the maturation-promoting factor and mitotic entry in mouse zygotes. Notably, the SCMC establishes a conserved molecular link with 14-3-3 and CDC25B in human oocytes/embryos. This study discloses the molecular mechanism through which the SCMC regulates the cell cycle in early embryos and elucidates the function of the SCMC in mammalian early embryogenesis.
The subcortical maternal complex (SCMC) maintains cleavage of early embryos. Here the authors identify 14-3-3 as a component of the SCMC and show that phosphorylation of TLE6 contributes to 14-3-3 recruitment and stabilization, ensuring mitotic entry in mouse zygotes.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 101/58
/ 14-3-3 Proteins - metabolism
/ 14/19
/ 64/60
/ 82/29
/ 82/83
/ Animals
/ cdc25 Phosphatases - genetics
/ cdc25 Phosphatases - metabolism
/ Cleavage
/ Embryo, Mammalian - cytology
/ Embryo, Mammalian - metabolism
/ Embryonic Development - physiology
/ Embryos
/ Female
/ Humanities and Social Sciences
/ Humans
/ Mammals
/ Mice
/ Oocytes
/ Proteins
/ Science
/ Zygotes
