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您的检索式：作者名="Mengcheng Luo"
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| 1 | PSPC1 regulates CHK1 phosphorylation through phase separation and participates in mouse oocyte maturation显示文摘Liquid–liquid phase separation (LLPS) underlies the formation of membraneless compartments in mammal cells. However, there are few reports that focus on the correlation of mouse oocyte maturation with LLPS. Previous studies have reported that paraspeckle component 1 (PSPC1) is related to the occurrence and development of tumors, but whether PSPC1 functions in mouse oocyte maturation is still unclear. Sequence analysis of PSPC1 protein showed that it contains a prion-like domain (PrLD) that is required for phase separation of proteins. In this study, we found that PSPC1 could undergo phase separation. Moreover, the loss of PrLD domain of PSPC1 could greatly weaken its phase separation ability. The immunofluorescence assays showed that PSPC1 is present in mouse oocytes in the germinal vesicle (GV) stage. Knockdown of PSPC1 significantly impeded the maturation of mouse oocytes in vitro. CHK1 has been reported to play important roles in the GV stage of mouse oocytes. Co-IP experiment revealed that PSPC1 could interact with phosphatase serine/threonine-protein phosphatase 5 (PPP5C), which regulates CHK1 phosphorylation. Western blot analysis revealed that PSPC1 could regulate the phosphorylation of CHK1 through PPP5C;however, PSPC1 without PrLD domain was inactive, suggesting that the lack of phase separation ability led to the abnormal function of PSPC1 in regulating CHK1 phosphorylation. Thus, we conclude that PSPC1 may undergo phase separation to regulate the phosphorylation level of CHK1 via PPP5C and participate in mouse oocyte maturation. Our study provides new insights into the mechanism of mouse oocyte maturation. | Jiong Li Peng Cui Qi Sun Ziye Du Zhen Chen Zejia Li Cong Liu Yuming Cao Zhe Yang Rong Liu Mengcheng Luo | 2021 | Acta Biochimica et Biophysica Sinica2021，53，11： | 0 |
| 2 | SDX on the X chromosome is required for male sex determination显示文摘Dear Editor,Sex determination is one of the most fundamental development processes,as gender is the first and most important identity of human.In most mammals,biological sex is determined by differences in sex chromosomes,1 while the autosomes are identical in both male and female.During the past 30 years,two genetic pathways of sex determination have been revealed in mammals:the testis-determining(SRY-SOX9-FGF9)and ovary-promoting(RSPO1-WNT/β-catenin-FOXL2)pathways. | Junfeng Zhan Peng Cui Ziqi Yu Wei Qu Mengcheng Luo | 2022 | Cell Research2022，32，1： | 0 |
| 3 | Nuclear localization of human MEIOB requires its NLS in the OB domain and interaction with SPATA22显示文摘MEIOB is a vital protein in meiotic homologous recombination and plays an indispensable role in human gametogenesis.In mammals,MEIOB and its partner SPATA22 form a heterodimer,ensuring their effective localization on single-strand DNA(ssDNA)and proper synapsis processes.Mutations in human MEIOB(hMEIOB)cause human infertility attributed to the failure of its interaction with human SPATA22(hSPATA22)and ssDNA binding.However,the detailed mechanism is still unclear.In our study,truncated or full-length hMEIOB and hSPATA22 are traced by fused expression with fluorescent proteins(i.e.,copGFP or mCherry),and the live cell imaging system is used to observe the expression and localization of the proteins.When transfected alone,hMEIOB accumulates in the cytoplasm.Interestingly,a covered NLS in the OB domain of hMEIOB is identified,which can be exposed by hSPATA22 and is necessary for the nuclear localization of hMEIOB.When hSPATA22 loses its hMEIOB interacting domain or NLS,the nuclear localization of hMEIOB is aborted.Collectively,our results prove that the NLS in the OB domain of hMEIOB and interaction with hSPATA22 are required for hMEIOB nuclear localization. | Yating Xu Zhen Chen Panfeng Wu Wei Qu Hanqing Shi Muyang Cheng Yumin Xu Tingyu Jin Cong Liu Cong Liu Yi Li Mengcheng Luo | 2023 | Acta Biochimica et Biophysica Sinica2023，55，1： | 0 |
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