Species-specific regulation of XIST by the JPX/FTX orthologs.
Species-specific regulation of XIST by the JPX/FTX orthologs.
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DOI:
10.1093/nar/gkad029
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发表时间:
2023-03-21
影响因子:
14.9
通讯作者:
中科院分区:
文献类型:
--
作者:
X chromosome inactivation (XCI) is an essential process, yet it initiates with remarkable diversity in various mammalian species. XIST, the main trigger of XCI, is controlled in the mouse by an interplay of lncRNA genes (LRGs), some of which evolved concomitantly to XIST and have orthologues across all placental mammals. Here, we addressed the functional conservation of human orthologues of two such LRGs, FTX and JPX. By combining analysis of single-cell RNA-seq data from early human embryogenesis with various functional assays in matched human and mouse pluripotent stem- or differentiated post-XCI cells, we demonstrate major functional differences for these orthologues between species, independently of primary sequence conservation. While the function of FTX is not conserved in humans, JPX stands as a major regulator of XIST expression in both species. However, we show that different entities of JPX control the production of XIST at various steps depending on the species. Altogether, our study highlights the functional versatility of LRGs across evolution, and reveals that functional conservation of orthologous LRGs may involve diversified mechanisms of action. These findings represent a striking example of how the evolvability of LRGs can provide adaptative flexibility to constrained gene regulatory networks. In contrast to the mouse, human JPX regulates XIST through mechanisms that are independent of JPX mature transcript, but which involve JPX transcription.
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影响因子:
14.8
作者:
通讯作者:
--
影响因子:
12.3
作者:
Hezroni H;Ben-Tov Perry R;Meir Z;Housman G;Lubelsky Y;Ulitsky I
通讯作者:
Ulitsky I
影响因子:
64.5
作者:
Dowen JM;Fan ZP;Hnisz D;Ren G;Abraham BJ;Zhang LN;Weintraub AS;Schujiers J;Lee TI;Zhao K;Young RA
通讯作者:
Young RA
影响因子:
64.8
作者:
Brons, I. Gabrielle M.;Smithers, Lucy E.;Vallier, Ludovic
通讯作者:
Vallier, Ludovic
影响因子:
30.8
作者:
Fulco, Charles P.;Nasser, Joseph;Engreitz, Jesse M.
通讯作者:
Engreitz, Jesse M.