Molecular mechanisms and topological consequences of drastic chromosomal rearrangements of muntjac deer

文献类型： 外文期刊

第一作者： Yin, Yuan

作者： Yin, Yuan;Zhou, Botong;Zhang, Chenzhou;Zhu, Wenbo;Liu, Guichun;Lin, Zeshan;Liu, Chang;Zhou, Jiong;Li, Zihe;Yang, Yue;Qian, Haiyuan;Peng, Yingmei;Chen, Xianqing;Chen, Lei;Wang, Wen;Fan, Huizhong;Hu, Yibo;Huang, Guangping;Wei, Fuwen;Fan, Huizhong;Wei, Fuwen;Hu, Yibo;Wang, Wen;Wei, Fuwen;Fan, Guangyi;Zhang, Yaolei;Fan, Guangyi;Fan, Guangyi;Wang, Jinhuan;Nie, Wenhui;Zhou, Fan;Liu, Lin;Zhong, Zhenyu;Yu, Jianping;Chang, Jiang;Zhang, Yaolei;Zhuo, Bingzhao;Zhang, Baowei;Li, Zhipeng;Li, Zhipeng;Zhou, Qi;Zhou, Qi;Zhou, Qi;Zhou, Qi

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：17.694； 五年影响因子：17.763 ）

ISSN：

年卷期： 2021 年 12 卷 1 期

页码：

收录情况： SCI

摘要： Muntjac deer have experienced drastic karyotype changes during their speciation, making it an ideal model for studying mechanisms and functional consequences of mammalian chromosome evolution. Here we generated chromosome-level genomes for Hydropotes inermis (2n = 70), Muntiacus reevesi (2n = 46), female and male M. crinifrons (2n = 8/9) and a contig-level genome for M. gongshanensis (2n = 8/9). These high-quality genomes combined with Hi-C data allowed us to reveal the evolution of 3D chromatin architectures during mammalian chromosome evolution. We find that the chromosome fusion events of muntjac species did not alter the A/B compartment structure and topologically associated domains near the fusion sites, but new chromatin interactions were gradually established across the fusion sites. The recently borne neo-Y chromosome of M. crinifrons, which underwent male-specific inversions, has dramatically restructured chromatin compartments, recapitulating the early evolution of canonical mammalian Y chromosomes. We also reveal that a complex structure containing unique centromeric satellite, truncated telomeric and palindrome repeats might have mediated muntjacs' recurrent chromosome fusions. These results provide insights into the recurrent chromosome tandem fusion in muntjacs, early evolution of mammalian sex chromosomes, and reveal how chromosome rearrangements can reshape the 3D chromatin regulatory conformations during species evolution. Muntjac deer underwent rapid species radiation and dramatic chromosome fusions within a short period of time. Here the authors reveal that repeat sequences likely mediated illegitimate recombination to result in chromosome fusions and that 3D chromatin architecture around fusion sites have no significant change, while significant interactions across fusion sites were gradually established after speciation.

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