溶組織內阿米巴14-3-3蛋白功能初探
[Abstract]:Objective: to predict the structure and function of endomoeba 14-3-3 (Eh14-3-3) protein, clone and identify the 14-3-3 gene, and purify the recombinant Eh14-3-3 protein. The immunological characteristics of the purified product were analyzed and the anti-recombinant Eh14-3-3 protein serum was prepared. The 14-3-3 protein sequences of different Entamoeba strains were compared and the possibility of 14-3-3 protein being used as a genetic and evolutionary marker was discussed. Methods: using various online tools of bioinformatics website and Vector NTI Suite software package to analyze and predict the function of Amiba 14-3-3 (Eh14-3-3) gene in tissues. Using the reverse transcription synthesis of cDNA strand and genomic DNA of total RNA of HM1:IMSS strain as templates, primers were designed to amplify the encoding gene sequence of Eh14-3-3 protein by PCR and cloned into pET19b vector. It was identified by double enzyme digestion and DNA sequencing. E. coli BL21 (DE3) was expressed. The target protein. SDS-PAGE was purified by resin chromatography, and the immunological properties of the purified product were identified by ELISA. Then the mice were immunized with it to prepare antiserum. The 14-3-3 protein coding gene sequences of trophozoites of different endoamoeba strains were amplified and compared with each other. Results: amoeba had three isoforms of Eh14-3-3 protein encoding genes, which were consistent with the Eh14-3-3 protein encoding genes included in GenBank (numbered EHU13418,EHU13419,EHU13420). The recombinant Eh14-3-3 protein was purified and a single protein band was obtained near 30kD by purification chromatography. ELISA and other experiments confirmed that the purified Eh14-3-3 protein reacted with the sera of patients with chronic recurrent episodes and the sera of patients with amoeba colitis. There was no significant response to the serum of patients with acute amoebic liver abscess and normal persons. The titer of anti-recombinant Eh14-3-3 protein serum was 1: 200 and the titer of ELISA was 1: 200, but the later cell localization test was negative. The comparison of 14-3-3 protein sequences among different strains of Entamoeba indicates that the 14-3-3 gene of Entamoeba is highly conserved, and the bioinformatics analysis also indicates that the 14-3-3 protein is an ideal molecule for studying the evolution of species. Conclusion: Entamoeba in tissue contains three isomers of 14-3-3 protein, which may play an important role in the formation of endomoeba cysts. 14-3-3 protein is a useful target molecule to study the evolution of species.
【學位授予單位】:復旦大學
【學位級別】:碩士
【學位授予年份】:2008
【分類號】:R383
【共引文獻】
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