人类基因中约有94％发生选择性剪接，使同一前体 m R‐NA分子产生不同基因型，编码不同蛋白质，极大增加了基因表达复杂程度和蛋白质多样性［1］。不同组织出现疾病时显示特定模式剪接变异体，这些剪接模式依赖于剪接因子在细胞核中的...人类基因中约有94％发生选择性剪接，使同一前体 m R‐NA分子产生不同基因型，编码不同蛋白质，极大增加了基因表达复杂程度和蛋白质多样性［1］。不同组织出现疾病时显示特定模式剪接变异体，这些剪接模式依赖于剪接因子在细胞核中的相对表达，包括表达量或翻译后修饰［2］。富含丝氨酸／精氨酸剪接因子1（SRSF1），是1个典型富含丝氨酸／精氨酸SR蛋白家族成员，参与基因组成性剪接和选择性剪接［3］。SRSF1通过调节基因选择性剪接参与肿瘤形成发展。展开更多
Serine/arginine-rich splicing factor 1(SRSF1), as a prototype member of the highly conserved serine/arginine family of RNA binding proteins, plays an important role in mRNA alternative splicing, stabilization, nuclear...Serine/arginine-rich splicing factor 1(SRSF1), as a prototype member of the highly conserved serine/arginine family of RNA binding proteins, plays an important role in mRNA alternative splicing, stabilization, nuclear export, and translation. Here, the expression system was established to purify full-length human SRSF1 from Escherichia coli(E. coli). The SRSF1 coding sequence was amplified by polymerase chain reaction(PCR) and inserted into the pET-28 a-ppSUMO vector with His-tag to construct a recombinant plasmid His-SUMO-SRSF1. Then the plasmid was transformed into BL21(DE3) competent cells for expression. After purification by affinity chromatography and cleavage of His-SUMO moiety, a highly purified SRSF1 with a molecular weight of around 28 kg/mol was obtained. The protein was analyzed by sizing chromatography and it was found that SRSF1 would form a polymer structure in the solution. According to Expasy bioinformatics analysis, SRSF1 is extremely unstable. Purification of full-length SRSF1 protein provides an opportunity to study mRNA splicing in vitro.展开更多
文摘人类基因中约有94％发生选择性剪接，使同一前体 m R‐NA分子产生不同基因型，编码不同蛋白质，极大增加了基因表达复杂程度和蛋白质多样性［1］。不同组织出现疾病时显示特定模式剪接变异体，这些剪接模式依赖于剪接因子在细胞核中的相对表达，包括表达量或翻译后修饰［2］。富含丝氨酸／精氨酸剪接因子1（SRSF1），是1个典型富含丝氨酸／精氨酸SR蛋白家族成员，参与基因组成性剪接和选择性剪接［3］。SRSF1通过调节基因选择性剪接参与肿瘤形成发展。
基金Shanghai Science and Technology Commission’s “Belt and Road Initiative International Cooperation Project”,China (No.19410741800)。
文摘Serine/arginine-rich splicing factor 1(SRSF1), as a prototype member of the highly conserved serine/arginine family of RNA binding proteins, plays an important role in mRNA alternative splicing, stabilization, nuclear export, and translation. Here, the expression system was established to purify full-length human SRSF1 from Escherichia coli(E. coli). The SRSF1 coding sequence was amplified by polymerase chain reaction(PCR) and inserted into the pET-28 a-ppSUMO vector with His-tag to construct a recombinant plasmid His-SUMO-SRSF1. Then the plasmid was transformed into BL21(DE3) competent cells for expression. After purification by affinity chromatography and cleavage of His-SUMO moiety, a highly purified SRSF1 with a molecular weight of around 28 kg/mol was obtained. The protein was analyzed by sizing chromatography and it was found that SRSF1 would form a polymer structure in the solution. According to Expasy bioinformatics analysis, SRSF1 is extremely unstable. Purification of full-length SRSF1 protein provides an opportunity to study mRNA splicing in vitro.
