Serospecificity of a cloned protease-resistant Treponema pallidum--specific antigen expressed in Escherichia coli
| Autor: | P J Sheridan, H A Erlich, W J Laird, S R Coates, D S Hansen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1986 |
| Předmět: |
Microbiology (medical)
DNA Bacterial Treponema vincentii DNA Recombinant Fluorescent treponemal antibody absorption test Microbiology Antigen Antibody Specificity medicine Escherichia coli Humans Syphilis Treponema pallidum Cloning Molecular Antiserum Antigens Bacterial Treponema medicine.diagnostic_test biology Treponema denticola Radioimmunoassay biology.organism_classification Molecular biology Syphilis Serodiagnosis biology.protein Antibody Research Article Peptide Hydrolases Plasmids |
| Popis: | We evaluated the serological reactivity of a protease-resistant antigen designated 4D which was encoded by Treponema pallidum DNA and was expressed in Escherichia coli from recombinant plasmid pAW329. This 19,000-molecular-weight antigen was purified in its native, non-protease-treated form from E. coli sonic extracts by molecular sieving and ion-exchange chromatography. Antibody binding to antigen 4D was detected by a radioimmunoassay. Antigen 4D-specific antibody was detected in 95% of the sera in a Centers for Disease Control syphilis serum panel. It was also detected in 55% of 121 primary syphilis patients, whereas syphilis antibody was detected in 83% of the sera by a fluorescent treponemal antibody absorption test and in 88% of the sera by a T. pallidum microhemagglutination test. In tests of 118 normal sera, less than 3% demonstrated antibody to antigen 4D; these results are similar to microhemagglutination and fluorescent treponemal antibody absorption test results. Rabbit antisera against Treponema phagedenis, Treponema refringens, Treponema denticola, and Treponema vincentii did not react with antigen 4D. |
| Databáze: | OpenAIRE |
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