Objective To screen the proteins associated with four-and-a-half LIM domains 3(FHL3) 3' untranslated region(3'UTR) in glioma cells. Methods Western blot was adopted to detect the regulatory effect of poly(C)-b...Objective To screen the proteins associated with four-and-a-half LIM domains 3(FHL3) 3' untranslated region(3'UTR) in glioma cells. Methods Western blot was adopted to detect the regulatory effect of poly(C)-binding protein 2(PCBP2) on FHL3. Biotin pull-down and sliver staining were employed to screen and verify the candidate binding proteins of FHL3 3'UTR. Then liquid chromatography-tandem mass spectrometry(LC-MS/MS) and molecule annotation system were used to identify and analyze the candidate binding proteins. Immunoprecipitation was conducted to study the interaction between PCBP2 and polypyrimidine tract-binding protein 1(PTBP1), a binding protein identified by LC-MS/MS. Results PCBP2 could bind to FHL3 mRNA 3'UTR-A and inhibited the expression of FHL3 in T98 G glioms cells. 22 candidate binding proteins were identified. Among them, there were 11 RNA binding proteins, including PCBP2. PTBP1 associated with FHL3 mRNA 3'UTR and interacted with PCBP2 protein. Conclusion PCBP2 and PTBP1 can both associate with FHL3 mRNA 3'UTR through forming a protein complex.展开更多
4个半LIM结构域蛋白3(four and a half LIM domain protein 3,FHL3)是LIM蛋白质超家族的一个成员,主要存在于骨骼肌中。它含有4个半LIM结构域,并通过这些LIM结构域与肌分化因子MyoD、肌动蛋白、转录因子MZF-1、细胞周期调节因子CDC25B...4个半LIM结构域蛋白3(four and a half LIM domain protein 3,FHL3)是LIM蛋白质超家族的一个成员,主要存在于骨骼肌中。它含有4个半LIM结构域,并通过这些LIM结构域与肌分化因子MyoD、肌动蛋白、转录因子MZF-1、细胞周期调节因子CDC25B等多种蛋白质发生相互作用,从而对成肌细胞分化、细胞骨架结构、骨骼肌形成以及某些基因的表达起到重要的调控作用。目前,FHL3的功能及其作用机制尚未阐明,深入开展FHL3的研究将可能为人类治疗某些疾病提供新思路。展开更多
基金Supported by Peking Union Medical College Youth Fundthe Fundamental Research Funds for the Central Universities(3332013052)
文摘Objective To screen the proteins associated with four-and-a-half LIM domains 3(FHL3) 3' untranslated region(3'UTR) in glioma cells. Methods Western blot was adopted to detect the regulatory effect of poly(C)-binding protein 2(PCBP2) on FHL3. Biotin pull-down and sliver staining were employed to screen and verify the candidate binding proteins of FHL3 3'UTR. Then liquid chromatography-tandem mass spectrometry(LC-MS/MS) and molecule annotation system were used to identify and analyze the candidate binding proteins. Immunoprecipitation was conducted to study the interaction between PCBP2 and polypyrimidine tract-binding protein 1(PTBP1), a binding protein identified by LC-MS/MS. Results PCBP2 could bind to FHL3 mRNA 3'UTR-A and inhibited the expression of FHL3 in T98 G glioms cells. 22 candidate binding proteins were identified. Among them, there were 11 RNA binding proteins, including PCBP2. PTBP1 associated with FHL3 mRNA 3'UTR and interacted with PCBP2 protein. Conclusion PCBP2 and PTBP1 can both associate with FHL3 mRNA 3'UTR through forming a protein complex.
文摘4个半LIM结构域蛋白3(four and a half LIM domain protein 3,FHL3)是LIM蛋白质超家族的一个成员,主要存在于骨骼肌中。它含有4个半LIM结构域,并通过这些LIM结构域与肌分化因子MyoD、肌动蛋白、转录因子MZF-1、细胞周期调节因子CDC25B等多种蛋白质发生相互作用,从而对成肌细胞分化、细胞骨架结构、骨骼肌形成以及某些基因的表达起到重要的调控作用。目前,FHL3的功能及其作用机制尚未阐明,深入开展FHL3的研究将可能为人类治疗某些疾病提供新思路。
