報道應(yīng)激相關(guān)激活轉(zhuǎn)錄因子-1調(diào)節(jié)線粒體非折疊蛋白反應(yīng)
Science在線報道應(yīng)激相關(guān)激活轉(zhuǎn)錄因子-1進(jìn)入線粒體的效率可調(diào)節(jié)線粒體非折疊蛋白反應(yīng)的水平。
為了更好地理解線粒體功能障礙的反應(yīng),研究者研究了,應(yīng)激相關(guān)激活轉(zhuǎn)錄因子-1(ATFS-1)感受線粒體應(yīng)激過程,及其在線粒體非折疊蛋白反應(yīng)(UPRmt)條件下與細(xì)胞核通信的機(jī)制。
研究發(fā)現(xiàn),調(diào)控的關(guān)鍵點(diǎn)是ATFS-1進(jìn)入線粒體的效率。除了一個核定位序列,ATFS-1還有一個氨基端的線粒體定位序列。這是UPRmt抑制反應(yīng)所*的。通常情況下,ATFS-1被導(dǎo)入到線粒體并降解。然而,在線粒體應(yīng)激情況下,ATFS-1進(jìn)入線粒體效率下降,使其相當(dāng)一部分積聚在細(xì)胞質(zhì)并轉(zhuǎn)移到細(xì)胞核中。該研究結(jié)果表明,細(xì)胞通過ATFS-1監(jiān)測線粒體蛋白輸入效率,進(jìn)而利用保護(hù)性轉(zhuǎn)錄反應(yīng)協(xié)調(diào)線粒體功能障礙的水平。
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