Purification and antigenicity of two recombinant forms of Boophilus microplus yolk pro-cathepsin expressed in inclusion bodies
| Autor: | Marcos Henrique Ferreira Sorgine, Sandra Estrazulas Farias, Alexandre T. Leal, Itabajara da Silva Vaz, Carlos Logullo, Carlos A. Ferreira, Paula Cristiane Pohl, Aoi Masuda, Maria Clara L. Nascimento-Silva, Pedro L. Oliveira |
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| Rok vydání: | 2005 |
| Předmět: |
Antigenicity
Sarcosine DNA Complementary Blotting Western Molecular Sequence Data Biology immunogenicity medicine.disease_cause Inclusion bodies law.invention chemistry.chemical_compound Epitopes Ticks law Complementary DNA medicine Animals Aspartic Acid Endopeptidases Urea Cloning Molecular Boophilus Yolk Cathepsin Escherichia coli Guanidine Inclusion Bodies Enzyme Precursors cattle tick Molecular biology Fusion protein Recombinant Proteins Protein purification chemistry Biochemistry Gene Expression Regulation Solubility Recombinant DNA Female Thioredoxin Biotechnology |
| Zdroj: | Repositório Institucional PUCRS Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) instacron:PUC_RS |
| ISSN: | 1046-5928 |
| Popis: | The tick Boophilus microplus is a bovine ectoparasite present in tropical and subtropical areas of the world and the use of vaccines is a promising method for tick control. BYC is an aspartic proteinase found in eggs that is involved in the embryogenesis of B. microplus and was proposed as an important antigen in the development of an anti-tick vaccine. The cDNA of BYC was amplified by PCR and cloned for expression in two forms with and without thioredoxin fusion protein (Trx), coding recombinant proteins named rBYC-Trx and rBYC, respectively. Expression, solubility, and yields of the two forms were analyzed. The recombinant proteins were expressed in inclusion bodies (IBs) and three denaturant agents (N-lauroyl sarcosine, guanidine hydrochloride, and urea) were tested for IBs solubilization. The N-lauroyl sarcosine solubilized 90.4 and 92.4% of rBYC-Trx and rBYC IBs, respectively, and was the most efficient denaturant. Two recombinant forms were affinity-purified by Ni2+-Sepharose under denaturing conditions. After dialysis, the yield of soluble protein was 84.1% for r-BYC-Trx and 5.9% for rBYC. These proteins were immune-reactive against sera from rabbit, mouse, and bovine previously immunized with native BYC, which confirms the antigenicity of the recombinant BYCs expressed in the Escherichia coli system. |
| Databáze: | OpenAIRE |
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