马泰勒虫棒状体颈部蛋白5基因的克隆与原核表达

doi:10.12140/j.issn.1000-7423.2023.04.017

中国寄生虫学与寄生虫病杂志 ›› 2023, Vol. 41 ›› Issue (4): 497-501.doi: 10.12140/j.issn.1000-7423.2023.04.017

马泰勒虫棒状体颈部蛋白5基因的克隆与原核表达

芦星¹(), 王水怡¹, 陈林军², 刘明明¹, 刘雨桐¹, 朱慧茹¹, 姜冰冰¹, 杜少磊¹, 巴音查汗¹, 刘丹丹¹, 张伟¹^,^*()

1 新疆农业大学动物医学学院，新疆乌鲁木齐 830052
2 呼和浩特海关技术中心，内蒙古呼和浩特 010020

收稿日期:2022-11-22 修回日期:2023-03-28 出版日期:2023-08-30 发布日期:2023-09-06
通讯作者: *张伟（1988-），男，博士，副教授，从事兽医寄生虫分子免疫学研究。E-mail：zw2017xjau@163.com
作者简介:芦星（1998-)，女，硕士研究生，从事兽医寄生虫分子免疫学研究。E-mail：luxingxing1234567@163.com
基金资助:
新疆维吾尔自治区天山青年计划-优秀青年科技人才项目(2020Q014);新疆农业大学博士后科研流动站资助项目

Cloning and prokaryotic expression of Theileria equi rhoptry neck protein 5 gene

LU Xing¹(), WANG Shuiyi¹, CHEN Linjun², LIU Mingming¹, LIU Yutong¹, ZHU Huiru¹, JIANG Bingbing¹, DU Shaolei¹, BAYIN Chahan¹, LIU Dandan¹, ZHANG Wei¹^,^*()

1 College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
2 Technology Center, Hohhot Customs District, Hohhot 010020, Inner Mongolia, China

Received:2022-11-22 Revised:2023-03-28 Online:2023-08-30 Published:2023-09-06
Contact: *E-mail: zw2017xjau@163.com
Supported by:
Tianshan Youth Program of Xinjiang Uygur Autonomous Region-Outstanding Young Scientific and Technological Talents Project(2020Q014);Xinjiang Agricultural University Post Doctoral Research Mobile Station Funding Project

摘要/Abstract

摘要：

从马泰勒虫新疆分离株PCR扩增棒状体颈部蛋白5（ron5）基因，构建pGEX-4T-ron5表达载体，转化至大肠埃希菌（E. coli）BL21（DE3）进行原核表达，十二烷基硫酸钠-聚丙烯酰胺凝胶电泳（SDS-PAGE）分析表达产物，以谷胱甘肽S-转移酶标签兔单抗（1:2 000）和马泰勒虫感染马阳性血清（1:100）作为一抗，以辣根过氧化物酶标记的羊抗兔IgG和兔抗马IgG（1:5 000）为二抗进行蛋白质免疫印迹（Western blotting）分析。马泰勒虫新疆分离株的ron5基因长1 434 bp，提交GenBank获得的登录号为OP777492。序列比对结果显示，马泰勒虫新疆分离株ron5的核苷酸和氨基酸序列与马泰勒虫WA株（GenBank登录号XM 004833657）的序列一致性最高，分别为99.6%和99.2%。系统进化树分析结果显示，马泰勒虫新疆分离株与马泰勒虫WA株聚在同一支上，二者亲缘关系最近。SDS-PAGE分析结果显示，异丙基硫代半乳糖苷（IPTG）诱导3 h时，RON5的表达量最高；RON5的相对分子质量（M_r）约为79 000，主要以包涵体形式表达。Western blotting分析结果显示，RON5可被谷胱甘肽S-转移酶标签抗体和马泰勒虫感染马血清识别，在M_r 79 000处有明显条带。本研究克隆了ron5，表达的RON5具有较好的抗原性。

关键词: 马泰勒虫, 棒状体颈部蛋白5, 原核表达, 抗原性

Abstract:

The rhoptry-neck protein 5 (ron5) gene was PCR amplified from the Xinjiang isolates of Theileria equi. The prokaryotic expression vector of pGEX-4T-ron5 was constructed and transformed into Escherichia coli BL21 (DE3) for prokaryotic expression. The expression products was analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Western blotting analysis was performed using glutathione S-transferase labeled rabbit monoclonal antibody (1:2 000) and horse serum infected with T. equi (1:100) as primary antibodies, and horseradish peroxidase labeled sheep anti-rabbit IgG and rabbit anti-horse IgG (1:5 000) as secondary antibodies. The ron5 of the Xinjiang isolate of T. equi was 1 434 bp, and the entry number obtained by GenBank was OP777492. Sequence comparison results showed that the nucleotide and amino acid sequences of ron5 of the Xinjiang isolate were the most consistent with those of T. equi WA strain (GenBank accession number XM 004833657), which were 99.6% and 99.2%, respectively. Phylogenetic tree analysis showed that the Xinjiang isolate and the T. equi WA strain were clustered on the same branch, with the most closely relation. SDS-PAGE analysis showed that the protein expression was the highest at 3 h induced by isopropyl thiogalactoside. The relative molecular mass (M_r) of RON5 is about 79 000, which is mainly expressed in the form of inclusion bodies. Western blotting results showed that RON5 could be recognized by glutathione S-transferase labeled antibody and horse serum infected with T. equi, with an obvious band at M_r79 000. In this study, ron5 was successfully cloned, and the RON5 expressed had good antigenicity.

Key words: Theileria equi, Rhoptry-neck protein 5, Prokaryotic expression, Antigenicity

中图分类号:

R382.9

芦星, 王水怡, 陈林军, 刘明明, 刘雨桐, 朱慧茹, 姜冰冰, 杜少磊, 巴音查汗, 刘丹丹, 张伟. 马泰勒虫棒状体颈部蛋白5基因的克隆与原核表达[J]. 中国寄生虫学与寄生虫病杂志, 2023, 41(4): 497-501.

LU Xing, WANG Shuiyi, CHEN Linjun, LIU Mingming, LIU Yutong, ZHU Huiru, JIANG Bingbing, DU Shaolei, BAYIN Chahan, LIU Dandan, ZHANG Wei. Cloning and prokaryotic expression of Theileria equi rhoptry neck protein 5 gene[J]. Chinese Journal of Parasitology and Parasitic Diseases, 2023, 41(4): 497-501.

图/表 3

参考文献 22

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马泰勒虫棒状体颈部蛋白5基因的克隆与原核表达

Cloning and prokaryotic expression of Theileria equi rhoptry neck protein 5 gene

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