The SUN1-SPDYA interaction plays an essential role in meiosis prophase I.

The SUN1-SPDYA interaction plays an essential role in meiosis prophase I.
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SUN1-SPDYA 相互作用在减数分裂前期 I 中发挥重要作用

DOI:
10.1038/s41467-021-23550-w
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发表时间:
2021-05-26
影响因子:
16.6
通讯作者:
Lei M
Lei M
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Chen Y;Wang Y;Chen J;Zuo W;Fan Y;Huang S;Liu Y;Chen G;Li Q;Li J;Wu J;Bian Q;Huang C;Lei M

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染色体在第一次减数分裂时与其同源配偶体配对和突触以正确分离。端粒与由SUN 1和KASH 5组成的LINC(核骨架和细胞骨架的连接体)复合物的关联使得端粒引导的染色体运动和端粒群形成成为可能,从而促进同源物的精确成对比对。在这里,我们确定了SUN 1和快速A(SPDYA)之间的直接相互作用,并确定了人类SUN 1-SPDYA-CDK 2三元复合物的晶体结构。对SPDYA结合缺陷的SUN 1突变小鼠减数分裂前期I过程的分析表明,SUN 1-SPDYA相互作用是端粒-LINC复合物连接和在核膜上组装环状端粒超分子结构所必需的,这对有效的同源配对和突触至关重要。总的来说,我们的研究结果提供了结构的见解减数分裂端粒结构是必不可少的减数分裂前期I进展。
Chromosomes pair and synapse with their homologous partners to segregate correctly at the first meiotic division. Association of telomeres with the LINC (Linker of Nucleoskeleton and Cytoskeleton) complex composed of SUN1 and KASH5 enables telomere-led chromosome movements and telomere bouquet formation, facilitating precise pairwise alignment of homologs. Here, we identify a direct interaction between SUN1 and Speedy A (SPDYA) and determine the crystal structure of human SUN1-SPDYA-CDK2 ternary complex. Analysis of meiosis prophase I process in SPDYA-binding-deficient SUN1 mutant mice reveals that the SUN1-SPDYA interaction is required for the telomere-LINC complex connection and the assembly of a ring-shaped telomere supramolecular architecture at the nuclear envelope, which is critical for efficient homologous pairing and synapsis. Overall, our results provide structural insights into meiotic telomere structure that is essential for meiotic prophase I progression.
端粒 TERB1-TRF1 相互作用对于雄性减数分裂至关重要。
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发表时间: 2017-12
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