鼴鼠基因組揭示調控重排與適應性雌雄間性相關
作者:
小柯機器人發布時間:2020/10/11 21:50:32
近日,德國馬克斯·普朗克分子遺傳學研究所Darío G. Lupiáñez、Stefan Mundlos等研究人員合作通過鼴鼠基因組發現,調控重排與適應性雌雄間性相關。 2020年10月9日,國際知名學術期刊《科學》發表了這一成果。
研究人員使用系統生物學的策略來研究了哺乳動物的獨特特徵:雌性鼴鼠中男性化卵睪體的發育。通過結合伊比利亞鼴鼠(Talpa occidentalis)染色體規模的基因組組裝,與轉錄組、表觀遺傳學和染色質相互作用數據集,研究人員發現重排改變具有不同性腺表達模式的基因監管圖譜。
其中包括涉及CYP17A1的串聯重複,控制雄激素合成的基因以及涉及睪丸前生長因子基因FGF9的染色體內倒置,該基因在葡萄胎卵母細胞中表達。具有敲入鼴鼠CYP17A1增強子或過表達FGF9的轉基因小鼠表現出表型重現鼴鼠的性特徵。
這些結果突出了整合基因組方法如何揭示非編碼序列變化的表型影響。
據介紹,將基因組變異與表型性狀聯繫起來仍然是進化遺傳學的主要挑戰。
附:英文原文
Title: The mole genome reveals regulatory rearrangements associated with adaptive intersexuality
Author: Francisca M. Real, Stefan A. Haas, Paolo Franchini, Peiwen Xiong, Oleg Simakov, Heiner Kuhl, Robert Schpflin, David Heller, M-Hossein Moeinzadeh, Verena Heinrich, Thomas Krannich, Annkatrin Bressin, Michaela F. Hartmann, Stefan A. Wudy, Dina K. N. Dechmann, Alicia Hurtado, Francisco J. Barrionuevo, Magdalena Schindler, Izabela Harabula, Marco Osterwalder, Michael Hiller, Lars Wittler, Axel Visel, Bernd Timmermann, Axel Meyer, Martin Vingron, Rafael Jiménez, Stefan Mundlos, Darío G. Lupiáez
Issue&Volume: 2020/10/09
Abstract: Linking genomic variation to phenotypical traits remains a major challenge in evolutionary genetics. In this study, we use phylogenomic strategies to investigate a distinctive trait among mammals: the development of masculinizing ovotestes in female moles. By combining a chromosome-scale genome assembly of the Iberian mole, Talpa occidentalis, with transcriptomic, epigenetic, and chromatin interaction datasets, we identify rearrangements altering the regulatory landscape of genes with distinct gonadal expression patterns. These include a tandem triplication involving CYP17A1, a gene controlling androgen synthesis, and an intrachromosomal inversion involving the pro-testicular growth factor gene FGF9, which is heterochronically expressed in mole ovotestes. Transgenic mice with a knock-in mole CYP17A1 enhancer or overexpressing FGF9 showed phenotypes recapitulating mole sexual features. Our results highlight how integrative genomic approaches can reveal the phenotypic impact of noncoding sequence changes.
DOI: 10.1126/science.aaz2582
Source: https://science.sciencemag.org/content/370/6513/208
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037