南湖新聞網訊 近日,華中農業大學水產學院魚類發育與遺傳育種團隊梅潔教授課題組和武漢大學肖銳課題組合作研究成果發表,研究揭示了m6A讀取器Igf2bp3通過調節m6A修飾生殖質基因的表達以實現斑馬魚生殖質組裝的分子機制。
生殖質是具有特定形態結構的細胞質,包含卵母細胞遺傳的各種RNA和蛋白質復合物,對生殖發育起到至關重要的作用。生殖質組裝是將生殖質RNA和蛋白招募到指定位置并進行組裝的動態過程,決定了未來生殖細胞的命運。大量研究表明在斑馬魚早期胚胎發育過程中,Bucky ball (Buc)通過調控生殖質mRNA表達在生殖質組裝過程中發揮重要功能,但其RNA調控機制還不清楚。
研究發現m6A讀取器Igf2bp3與Buc相互作用,并與之共定位于生殖質中。與buc突變體表型相似,igf2bp3母源突變導致異常的生殖質組裝和生殖細胞分化缺陷,該表型可通過注射igf2bp3 mRNA進行部分挽救。進一步研究發現,Igf2bp3作為m6A識別蛋白通過結合m6A修飾的生殖質相關mRNA來抑制其降解。
該研究揭示了Igf2bp3作為Buc的直接效應蛋白,介導m6A修飾依賴的生殖質相關mRNA的基因表達調控,并維持正常的生殖質組裝(圖1)。該工作闡述了m6A修飾在魚類生殖質組裝過程中的作用,為魚類生殖發育研究提供了參考。
【英文摘要】
Bucky ball (Buc) is involved in germ plasm (GP) assembly during early zebrafish development by regulating GP mRNA expression via an unknown mechanism. The present study demonstrates that an m6A reader Igf2bp3 interacts and colocalizes with Buc in the GP. Similar to the loss of Buc, the genetic deletion of maternal igf2bp3 in zebrafish leads to abnormal GP assembly and insufficient germ cell specification, which can be partially restored by the injection of igf2bp3 mRNA. Igf2bp3 binds to m6A-modified GP-organizer and GP mRNAs in an m6A-dependent manner and prevents their degradation. These findings indicate that the functions of Igf2bp3, a direct effector protein of Buc, in GP mRNA expression and GP assembly involve m6A-dependent regulation; these results emphasize a critical role of m6A modification in the process of GP assembly.
論文鏈接:https://www.sciencedirect.com/science/article/pii/S209592732100116X
日期:2021-05-11
生殖質是具有特定形態結構的細胞質,包含卵母細胞遺傳的各種RNA和蛋白質復合物,對生殖發育起到至關重要的作用。生殖質組裝是將生殖質RNA和蛋白招募到指定位置并進行組裝的動態過程,決定了未來生殖細胞的命運。大量研究表明在斑馬魚早期胚胎發育過程中,Bucky ball (Buc)通過調控生殖質mRNA表達在生殖質組裝過程中發揮重要功能,但其RNA調控機制還不清楚。
研究發現m6A讀取器Igf2bp3與Buc相互作用,并與之共定位于生殖質中。與buc突變體表型相似,igf2bp3母源突變導致異常的生殖質組裝和生殖細胞分化缺陷,該表型可通過注射igf2bp3 mRNA進行部分挽救。進一步研究發現,Igf2bp3作為m6A識別蛋白通過結合m6A修飾的生殖質相關mRNA來抑制其降解。
該研究揭示了Igf2bp3作為Buc的直接效應蛋白,介導m6A修飾依賴的生殖質相關mRNA的基因表達調控,并維持正常的生殖質組裝(圖1)。該工作闡述了m6A修飾在魚類生殖質組裝過程中的作用,為魚類生殖發育研究提供了參考。
【英文摘要】
Bucky ball (Buc) is involved in germ plasm (GP) assembly during early zebrafish development by regulating GP mRNA expression via an unknown mechanism. The present study demonstrates that an m6A reader Igf2bp3 interacts and colocalizes with Buc in the GP. Similar to the loss of Buc, the genetic deletion of maternal igf2bp3 in zebrafish leads to abnormal GP assembly and insufficient germ cell specification, which can be partially restored by the injection of igf2bp3 mRNA. Igf2bp3 binds to m6A-modified GP-organizer and GP mRNAs in an m6A-dependent manner and prevents their degradation. These findings indicate that the functions of Igf2bp3, a direct effector protein of Buc, in GP mRNA expression and GP assembly involve m6A-dependent regulation; these results emphasize a critical role of m6A modification in the process of GP assembly.
論文鏈接:https://www.sciencedirect.com/science/article/pii/S209592732100116X
日期:2021-05-11