晨间信号Morning Signal
《科学》 第393卷 第6810期 · 2026年7月30日 · 中文解读

X染色体失活引导L1转座子突变富集于人类X染色体

X-chromosome inactivation draws L1 mutagenesis to the human X chromosome · J. de los Rios Barreda et al.
约 190 分钟Research在小程序里点播,20 到 60 分钟做好
这篇讲什么
研究表明,在XX个体中,X染色体失活(XCI)使L1逆转录转座子的整合偏好于失活的X染色体,从而驱动了X染色体上L1序列的富集。
原文开头
Full article and list of author affiliations: https://doi.org/10.1126/ science.adz8081 Jose de los Rios Barreda†, Maria E. Ferreiro†, Natasha Jansz†, Charles C. Bell†, et al. INTRODUCTION: The human X chromosome has two unusual properties. First, in XX individuals, X-chromosome inactivation (XCI) silences one X chromosome, ensuring that X-linked gene dosage is equivalent to that of XY individuals. Second, ∼30% of the X chromosome is composed of long interspersed element-1 (LINE-1 or L1) retrotransposons, a type of mobile DNA, and this percentage is double the autosome average. In 1998, Mary Lyon connected these features and proposed that L1 sequences on the X chromosome may facilitate XCI and accumulate due to positive selection. …
摘自《科学》(Science)第393卷 第6810期 · 2026年7月30日,J. de los Rios Barreda et al.。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。
晨间信号小程序码
微信扫码,在小程序里听完整版
不用登录先听一篇 · 或在微信搜索小程序 晨间信号
同期其他文章