MORC2B is essential for meiotic progression and fertility.

MORC2B is essential for meiotic progression and fertility.
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MORC2B 对于减数分裂进展和生育能力至关重要

DOI:
10.1371/journal.pgen.1007175
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发表时间:
2018-01
期刊:
影响因子:
4.5
通讯作者:
Wang PJ
Wang PJ
中科院分区:
生物学2区
文献类型:
--
作者:
Shi B;Xue J;Zhou J;Kasowitz SD;Zhang Y;Liang G;Guan Y;Shi Q;Liu M;Sha J;Huang X;Wang PJ

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微囊藻(MORC)家族蛋白是染色质重塑因子,在DNA损伤反应和转座子沉默等多种生物过程中发挥作用。在这里,我们报道小鼠Morc2b编码MORC蛋白家族的一个功能性生殖细胞特异性成员。Morc2b在进化过程中通过Morc2a的反转录而在啮齿动物谱系中特异性地出现。Morc2b的失活导致两性减数分裂停滞和不育。缺乏morc2b的精母细胞和卵母细胞表现为染色体突触失败,减数分裂重组受阻,细胞凋亡增加。MORC2B的缺失导致减数分裂特异性基因的表达失调。此外,我们发现MORC2B与MORC2A相互作用。我们的研究结果表明,Morc2b是一个相对较新的基因,在减数分裂和生育中发挥了重要作用。
The microrchidia (MORC) family proteins are chromatin-remodelling factors and function in diverse biological processes such as DNA damage response and transposon silencing. Here, we report that mouse Morc2b encodes a functional germ cell-specific member of the MORC protein family. Morc2b arose specifically in the rodent lineage through retrotransposition of Morc2a during evolution. Inactivation of Morc2b leads to meiotic arrest and sterility in both sexes. Morc2b-deficient spermatocytes and oocytes exhibit failures in chromosomal synapsis, blockades in meiotic recombination, and increased apoptosis. Loss of MORC2B causes mis-regulated expression of meiosis-specific genes. Furthermore, we find that MORC2B interacts with MORC2A, its sequence paralogue. Our results demonstrate that Morc2b, a relatively recent gene, has evolved an essential role in meiosis and fertility.
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