人高迁移率族蛋白的分子改建及原核表达

目的 构建人高迁移率族蛋白(high mobility group box 1 protein,HMGB1)突变体及表达与鉴定目的蛋白,为进一步通过HMGB1突变体蛋白与天然HMGB1竞争结合相应受体而抑制其致炎效应奠定了基础.方法 在已成功克隆和表达人HMGB1的基础上,采用一步反向PCR致突变法构建人HMGB1 cDNA的6个突变体,并分别克隆于原核表达载体pQE-80L上,表达6个相应的重组HMGB1突变体蛋白,并经Western blot鉴定.结果 获得人HMGB1 cDNA的6个突变体,并成功构建到原核表达载体pQE-80L上,诱导表达且经Western blot鉴定了目的蛋白.结论 成功构建人HMGB1突变体,并进行了目的蛋白表达的鉴定.

Reconstruction and prokaryotic expression of human high mobility group box 1 protein

Objective To design and prepare recombinant mutant human high mobility group box 1 protein (HMGB1s) that can combine with HMGB1 receptors but cannot produce inflammatory effect, and accordingly lead to the creation of a new potential agent for anti-inflammatory therapy. Methods This experiment was based on successful clone and expression of human HMGB1.Six mutant HMGB1 cDNA were designed and constructed by one step inverse PCR. They were cloned into prokaryotic expressive vector pQE80L and followed with production of mutant HMGB1s and identification by Western blotting. Results Six mutant proteins were designed and constructed into prokaryotic expressive vector pQE80L. The recombinant HMGB1 proteins were obtained and identified by Western blotting. Conclusion Human HMGB1 mutants have been successfully constructed and the expression and characterization of intent proteins are identified. It will lay a foundation for further study on biological functions of HMGB1.