HEI10粗化、染色质和序列多态性塑造了植物减数分裂重组景观

IF 8.3 2区 生物学 Q1 PLANT SCIENCES Current opinion in plant biology Pub Date : 2024-06-04 DOI:10.1016/j.pbi.2024.102570
Chris Morgan , Martin Howard , Ian R. Henderson
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引用次数: 0

摘要

减数分裂是真核细胞的一种保守分裂,可产生有性生殖所需的孢子。在减数分裂过程中,染色体配对并发生程序性 DNA 双链断裂,随后进行同源修复,这可能导致相互交叉。交叉形成受到高度调控,通常每对同源染色体很少发生交叉。此外,交叉点的间距比均匀随机排列的预期间距要大,这就是干扰现象。在植物中,保守的 HEI10 E3 连接酶最初沿着减数分裂染色体装载,然后成熟为少量病灶,与交叉位置相对应。我们回顾了粗化模型,该模型将这些动态过程解释为一个扩散和聚集过程,最终形成近似均匀分布的 HEI10 病灶。根据粗化模型,我们回顾了潜在的染色质状态以及同源体间多态性的存在是如何塑造减数分裂重组景观的。最后,我们探讨了了解植物基因组减数分裂重组控制的未来方向。
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HEI10 coarsening, chromatin and sequence polymorphism shape the plant meiotic recombination landscape

Meiosis is a conserved eukaryotic cell division that produces spores required for sexual reproduction. During meiosis, chromosomes pair and undergo programmed DNA double-strand breaks, followed by homologous repair that can result in reciprocal crossovers. Crossover formation is highly regulated with typically few events per homolog pair. Crossovers additionally show wider spacing than expected from uniformly random placement - defining the phenomenon of interference. In plants, the conserved HEI10 E3 ligase is initially loaded along meiotic chromosomes, before maturing into a small number of foci, corresponding to crossover locations. We review the coarsening model that explains these dynamics as a diffusion and aggregation process, resulting in approximately evenly spaced HEI10 foci. We review how underlying chromatin states, and the presence of interhomolog polymorphisms, shape the meiotic recombination landscape, in light of the coarsening model. Finally, we consider future directions to understand the control of meiotic recombination in plant genomes.

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来源期刊
Current opinion in plant biology
Current opinion in plant biology 生物-植物科学
CiteScore
16.30
自引率
3.20%
发文量
131
审稿时长
6-12 weeks
期刊介绍: Current Opinion in Plant Biology builds on Elsevier's reputation for excellence in scientific publishing and long-standing commitment to communicating high quality reproducible research. It is part of the Current Opinion and Research (CO+RE) suite of journals. All CO+RE journals leverage the Current Opinion legacy - of editorial excellence, high-impact, and global reach - to ensure they are a widely read resource that is integral to scientists' workflow.
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