Objective To clone Tp0821,Tp0319,Tp0971 and Tp0663 gene,construct prokaryotic expression plasmid,the ex-pression of recombinant proteins,purification and used to detect syphilis patients serum antibodies.To explore Tp0821, Tp0971,Tp0319 and Tp0663 recombinant protein in the diagnosis of Tp infection,rich library of candidate antigens syphilis serology diagnosis.Methods From Tp library screening Tp0821,Tp0319,Tp0971 and Tp0663 four kinds of membrane pro-tein,through the analysis of the bioinformatics software selection advantage antigen epitope,connected with pQE32 carrier respectively built pQE32/Tp0821,pQE32/Tp0319,pQE32/Tp0971 and pQE32/Tp0663 prokaryotic expression recombi-nant;In vitro cloning,expression and purification and on single Tp0821,Tp0319,Tp0971,Tp0663 and four kinds of recombi-nant protein chimeric antigen (Tp0821-Tp0319-Tp0971-Tp0663)in order to establish the indirect Tp-envelope antigen ELISA method,based on TRUST and TPPA method comparison,detection collected from January 2013 to June 2014 in Shenzhen Baoan District People’s Hospital outpatient and hospitalization Tp negative patients,160 cases of positive speci-mens of 83 cases of clinical and Tp,and evaluated its application in the syphilis serology diagnosis.Results Successful con-structed of prokaryotic expression vector pQE32/Tp0821,pQE32/Tp0319,pQE32/Tp0971 and pQE32/Tp0663.Efficient expressed and purified their relative molecular mass of recombinant proteins.Seted up Tp-indirect ELISA method to detect 160 cases of Tp negativepositive clinical specimens and 83 cases of Tp,and compared with TPPA,the sensitivity were 85.5% (71/83),84.3% (70/83),89.2% (74/83),81.9% (68/83)and 95.2% (79/83)respectively,specificity was 100%(160/160),and the coincidence rate was 82.6%~95.7%.Single Tp0821,Tp0319,Tp0971 and Tp0663 recombinant protein positive rate of TP-ELISA was established (85.5%,84.3%,89.2% and 81.9%)compared with TPPA method of positive detection rate (100%)had significant difference statistically significant (χ2= 24.5~31.8,P<0.01),and four kinds of re-combinant protein chimeric antigen positive rate of TP-ELISA was established with the TPPA method the positive detection rate of comparative difference was statistically significant (χ2=7.95,P<0.05).Conclusion Preparation Tp0821,Tp0319, Tp0971 and Tp0663 recombinant protein had good immune activity,for the further study of its application in the diagnosis of syphilis serology lay a certain foundation,but in four kinds of recombinant protein chimeric antigen based Tp Tp-indirect ELISA method for serological diagnosis,can improve the detection sensitivity.%目的：克隆Tp0821，Tp0319，Tp0971和Tp0663基因，构建原核表达质粒，进行重组蛋白的表达、纯化并用于检测梅毒病人血清抗体，从而探讨Tp0821，Tp0971，Tp0319和Tp0663重组蛋白在 Tp感染诊断中的作用，丰富梅毒血清学诊断的候选抗原库。方法从Tp库中筛选Tp0821，Tp0319，Tp0971和Tp0663四种膜蛋白，通过生物信息学软件分析挑选优势抗原表位，与 pQE32载体进行连接分别构建 pQE32／Tp0821，pQE32／Tp0319，pQE32／Tp0971和 pQE32／Tp0663原核表达重组体；进行体外克隆表达与纯化，并分别以单一的 Tp0821，Tp0319，Tp0971，Tp0663及四种重组蛋白嵌合抗原（Tp0821-Tp0319-Tp0971-Tp0663）为包被抗原建立间接Tp-ELISA方法，以TRUST和TPPA法为对照，检测2013年1月～2014年6月深圳市宝安区人民医院门诊及住院Tp阴性患者160例和 Tp阳性83例临床标本，评价其在梅毒血清学诊断中的应用。结果成功构建原核表达载体 pQE32／Tp0821，pQE32／Tp0319，pQE32／Tp0971和 pQE32／Tp0663；高效表达和纯化出各自相对分子质量的重组蛋白。建立的间接 Tp-ELISA法检测160例 Tp阴性和 8 3例 Tp阳性临床标本，与TPPA相比，敏感度分别为85.5％（71／83），84.3％（70／83），89.2％（74／83），81.9％（68／83）及95.2％（79／83），特异度均为100％（160／160），符合率为82.6％～95.7％。单一的 Tp0821，Tp0319，Tp0971和 Tp0663重组蛋白建立的 TP-ELISA的阳性检出率（85.5％，84.3％，89.2％及81.9％）与 TPPA法的阳性检出率（100％）比较差异有统计学显著性意义（χ2＝24.5～31.8，P均＜0.01），而四种重组蛋白嵌合抗原建立的 TP-ELISA的阳性检出率与 TPPA法的阳性检出率比较差异有统计学意义（χ2＝7.95，P＜0.05）。结论制备的 Tp0821，Tp0319，Tp0971和 Tp0663重组蛋白具有良好的免疫活性，为进一步研究其在梅毒血清学诊断中的应用奠定一定的基础，但以四种重组蛋白嵌合抗原建立的间接 Tp-ELISA法进行Tp血清学诊断，能提高其检测敏感度。
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