National Natural Science Foundation of China (NSFC)
32071199, 91940302
中国
Chinese Academy of Sciences
XDB37010201
中国
National Basic Research Program of China (973 Program)
2017YFA0504600
中国
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2024 タイトル: A meiotic driver hijacks an epigenetic reader to disrupt mitosis in noncarrier offspring. 著者: Yu Hua / Jianxiu Zhang / Man-Yun Yang / Fan-Yi Zhang / Jing-Yi Ren / Xiao-Hui Lyu / Yan Ding / Fang Suo / Guang-Can Shao / Jun Li / Meng-Qiu Dong / Keqiong Ye / Li-Lin Du / 要旨: Killer meiotic drivers (KMDs) are selfish genetic elements that distort Mendelian inheritance by selectively killing meiotic products lacking the KMD element, thereby promoting their own propagation. ...Killer meiotic drivers (KMDs) are selfish genetic elements that distort Mendelian inheritance by selectively killing meiotic products lacking the KMD element, thereby promoting their own propagation. Although KMDs have been found in diverse eukaryotes, only a limited number of them have been characterized at the molecular level, and their killing mechanisms remain largely unknown. In this study, we identify that a gene previously deemed essential for cell survival in the fission yeast is a single-gene KMD. This gene, , kills nearly all progeny in a × cross. By analyzing polymorphisms of among natural strains, we identify a resistant haplotype, HT3. This haplotype lacks killing ability yet confers resistance to killing by the wild-type . Proximity labeling experiments reveal an interaction between Tdk1, the protein product of , and the epigenetic reader Bdf1. Interestingly, the nonkilling Tdk1-HT3 variant does not interact with Bdf1. Cryoelectron microscopy further elucidated the binding interface between Tdk1 and Bdf1, pinpointing mutations within Tdk1-HT3 that disrupt this interface. During sexual reproduction, Tdk1 forms stable Bdf1-binding nuclear foci in all spores after meiosis. These foci persist in germinated progeny and impede chromosome segregation during mitosis by generating aberrant chromosomal adhesions. This study identifies a KMD that masquerades as an essential gene and reveals the molecular mechanism by which this KMD hijacks cellular machinery to execute killing. Additionally, we unveil that losing the hijacking ability is an evolutionary path for this single-gene KMD to evolve into a nonkilling resistant haplotype.
タンパク質・ペプチド: Meiotically up-regulated gene 135 protein,SWR1 complex bromodomain subunit bdf1,Immunoglobulin G-binding protein G
リガンド: water
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超分子 #1: Tdk1-Bdf1 complex
超分子
名称: Tdk1-Bdf1 complex / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1 詳細: The fusion protein comprises of the residues 211-357 of Tdk1,a linker sequence(SGGGSGGGSGGGSGFKKASSSDNKEQGGGSGGGSGSGGGS), residues 372-554 of Bdf1, a linker sequence of (SGGGSSGGGS) and ...詳細: The fusion protein comprises of the residues 211-357 of Tdk1,a linker sequence(SGGGSGGGSGGGSGFKKASSSDNKEQGGGSGGGSGSGGGS), residues 372-554 of Bdf1, a linker sequence of (SGGGSSGGGS) and residues 228-282 of Immunoglobulin G-binding protein G(GB1).