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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Mcallister, G. Hoet, M. H. Sillekens, P. T. Lerner, M. R. Habets, W. J. Van Venrooij, W. J. |
| Description | Author Affiliation: Habets WJ ( Department of Biochemistry, University of Nijmegen, The Netherlands.); |
| Abstract | Autoantibodies from a patient with systemic lupus erythematosus, which recognize U1 and U2 small nuclear ribonucleoprotein particles (snRNPs), were used to map B-cell autoepitopes on the U1 snRNP-specific A protein. This protein contains two regions that are highly similar to regions in the U2 snRNP-specific B' protein. A site termed epitope 2 maps in one such region and was found to react with antibodies cross-reactive between A and B'. A second site, epitope 1, is situated in a proline-rich region that shows no homology with B'. This epitope can bind three different autoantibodies with distinct specificities. Epitope 1-affinity-purified antibodies from different patients react with either (i) the A protein exclusively; (ii) proteins A, B'/B, a synthetic peptide for part of the N polypeptide, and an unidentified protein with a molecular mass of 50 kDa; or (iii) proteins A, B'/B, C, and the N-derived peptide. Comparison of the primary structures of proteins B'/B, N, and C reveals multiple epitope 1-like sequences in all of them. The possibility that these repeating regions act as immunogens in patients with autoimmune disease is discussed. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 12 |
| Volume Number | 86 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1989-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | B-Lymphocytes Immunology Epitopes Ribonucleoproteins Amino Acid Sequence Cell Nucleus Cross Reactions Enzyme-Linked Immunosorbent Assay HeLa Cells Molecular Sequence Data Peptide Mapping Recombinant Proteins Genetics Ribonucleoproteins, Small Nuclear Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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