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| Content Provider | PubMed Central |
|---|---|
| Author | Espitia, C. Espinosa, R. Saavedra, R. Mancilla, R. Romain, F. Laqueyrerie, A. Moreno, C. |
| Abstract | The relationship between Mycobacterium tuberculosis 50- to 55-kDa protein and Mycobacterium bovis BCG 45- to 47-kDa antigen was examined by using immunological and biochemical criteria. Reciprocal cross-reactivity with a rabbit polyclonal antiserum against the M. bovis BCG protein and with a monoclonal antibody raised against the M. tuberculosis antigen was observed. The epitope recognized by this antibody was apparently present only in proteins of M. tuberculosis and M. bovis BCG among the 11 mycobacterial species tested. The amino-terminal sequences and total amino acid contents of these proteins showed strong similarities. Both antigens are glycoproteins as assessed by binding of concanavalin A, labeling of carbohydrate moieties with biotin-hydrazide, and digestion of carbohydrates with jack bean alpha-D-mannosidase, which produced a reduction of the molecular weights of the proteins and totally eliminated concanavalin A binding. Both M. tuberculosis and M. bovis BCG proteins are secreted, since they were found mainly in the culture medium. Analysis of M. tuberculosis 50- to 55-kDa antigen by two-dimensional gel electrophoresis showed at least seven different components, as previously described for the M. bovis BCG antigen. Solid-phase immunoassays showed that the purified M. tuberculosis 50- to 55-kDa protein was recognized by serum specimens from 70% of individuals with pulmonary tuberculosis from a total of 77 Mexican patients examined. |
| Starting Page | 580 |
| File Format | |
| ISSN | 10985522 |
| e-ISSN | 10985522 |
| Journal | Infection and Immunity |
| Issue Number | 2 |
| Volume Number | 63 |
| Language | English |
| Publisher Date | 1995-02-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Infectious Diseases Parasitology Immunology Microbiology |
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