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第44卷第6期                           南京医科大学学报(自然科学版)
                  2024年6月                   Journal of Nanjing Medical University(Natural Sciences)     ·753 ·


               ·基础研究·

                SENP1在SPOP去SUMO化修饰中的作用研究



                张赟豪,韩博昂,王 瑜,朱 琴,乐 珅,俞婷婷,程 雁 ,刘 晨                             *
                                                                     *
                南京医科大学基础医学院医学遗传学系,江苏                 南京 211166




               [摘   要] 目的:研究小泛素相关修饰物(small ubiquitin⁃related modifier,SUMO)修饰对 SPOP(speckle type BTB/POZ protein)
                蛋白水平和细胞定位的影响,并尝试在肾透明细胞癌(clear cell renal cell carcinoma,ccRCC)中探讨 SUMO 特异性蛋白酶 1
               (sentrin⁃specific proteases 1,SENP1)和SPOP之间的相关性。方法:利用野生型(wild type,WT)和Senp1敲除的小鼠胚胎成纤维
                细胞研究 Senp1 对 Spop 蛋白水平和细胞定位的影响,并通过比较外源 WT⁃Spop 和 Spop 的 SUMO 修饰位点突变体的蛋白表达
                量,进一步确认SUMO修饰对Spop蛋白水平的影响。后续通过邻位连接技术(proximity ligation assay,PLA)研究WT⁃Spop及其
                SUMO修饰位点突变体与SUMO1的结合能力。最后通过ccRCC患者的RNA表达数据和ccRCC细胞系探讨SENP1和SPOP在
                ccRCC中的相关性。结果:Senp1 敲除下调小鼠胚胎成纤维细胞中 Spop 的蛋白量和稳定性,但不影响其细胞核定位。突变
                Spop 的 SUMO 修饰位点后,其与 Sumo1 的结合能力下降,蛋白量也有所降低。SENP1 和 SPOP 的表达在 ccRCC 中呈正相关。
                结论:Senp1通过去SUMO化修饰稳定Spop蛋白,SENP1和SPOP的表达在ccRCC中呈正相关。
               [关键词] SPOP;SENP1;SUMO修饰;肾透明细胞癌
               [中图分类号] Q343                    [文献标志码] A                        [文章编号] 1007⁃4368(2024)06⁃753⁃09
                doi:10.7655/NYDXBNSN240028


                Study on the role of SENP1 in the deSUMOylation modification of SPOP

                                                                                             *
                ZHANG Yunhao,HAN Bo’ang,WANG Yu,ZHU Qin,YUE Shen,YU Tingting,CHENG Yan ,LIU Chen       *
                Department of Medical Genetics,School of Basic Medicine,Nanjing Medical University,Nanjing 211166,China


               [Abstract] Objective:To elucidate the impact of small ubiquitin⁃related modifier(SUMO)modification on the protein levels and
                cellular localization of speckle type BTB/POZ protein(SPOP)and explore the correlation between sentrin ⁃ specific proteases 1
               (SENP1)and SPOP in clear cell renal cell carcinoma(ccRCC). Methods:Using wild type(WT)and Senp1 knockout murine
                embryonic fibroblasts(MEFs),we investigated the effects of Senp1 on Spop protein level and cellular localization. By comparing the
                protein expression levels of WT⁃Spop and its SUMO modification site mutants,the effects of SUMO modification on Spop protein levels
                were further confirmed. Proximity ligation assay(PLA)was employed to study the impact of Spop SUMOylation site mutation on the
                binding ability with small ubiquitin⁃related modifier 1(SUMO1). Finally,the correlation between SENP1 and SPOP in ccRCC was
                examined utilizing datasets and ccRCC cell lines. Results:Senp1 knockout down⁃regulated the protein level and stability of Spop in
                MEFs without affecting its nuclear localization. Mutating the SUMOylation modification site of Spop attenuated its binding affinity with
                Sumo1,consequently leading to diminished protein levels. Notably,the expression of SENP1 and SPOP exhibited a positive correlation
                in ccRCC. Conclusion:Senp1 stabilizes Spop protein through deSUMOylation modification. The expression of SENP1 and SPOP is
                positively correlated in ccRCC.
               [Key words] SPOP;SENP1;SUMO modification;clear cell renal cell carcinoma
                                                                              [J Nanjing Med Univ,2024,44(06):753⁃761]





                                                                      小 泛 素 相 关 修 饰 物(small ubiquitin ⁃ related
                                                                  modifier,SUMO)修饰是蛋白质翻译后修饰的一种,
               [基金项目] 国家自然科学基金(81702747,82172629)
                                                                                                             [1]
                                                                  其能够调控蛋白的相互作用、活性及亚细胞定位 ,
                ∗
                通信作者(Corresponding author),E⁃mail:liuchen@njmu.edu.
                cn;sycheng@njmu.edu.cn                            从而调节多种细胞进程。与泛素化过程类似,
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