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| Content Provider | Springer Nature Link |
|---|---|
| Author | Mahler, Michael Mierau, Rudolf Blüthner, Martin |
| Copyright Year | 2000 |
| Abstract | The major targets recognized by anti-centromere autoantibodies are the three centromere-associated proteins (CENPs) A, B, and C, with apparent molecular masses of 19, 80, and 140 kDa, respectively. Previously a major epitope region on the 19-kDa CENP-A antigen was identified by synthesis of a soluble synthetic 15-mer peptide (amino acids 3–17) to be used in enzyme-linked immunosorbent assay and western blot competition assays. However, no systematic experimental scanning for epitope regions on the CENP-A autoantigen has yet been performed. In this study we scanned the complete CENP-A amino acid sequence for epitopes using 19 previously characterized autoimmune-sera. Overlapping peptides 15 amino acids in length and offset by three amino acids were synthesized on activated membranes, covering the whole CENP-A autoantigen. Probing of the membranes with various anti-centromere sera showed that all epitopes are clustered in the N-terminal 45 amino acids. For fine-mapping of this autoreactive region the N-terminus of CENP-A (amino acids 1–45) was scanned again by probing overlapping 15-mer, 12-mer, 10-mer, 8-mer, 7-mer, 6-mer, and 5-mer peptides, all offset by one amino acid, with anti-centromere sera. In this way we localized two epitope core regions within the N-terminal 45 amino acids, one covering amino acids 2–17, recognized by 17 sera, and the other covering amino acids 22–38, recognized by 18 sera. One serum did not react with CENP-A at all. Several sera seem to recognize overlapping individual epitopes within these two epitope core regions. All sera, however, recognize a sequence motif G/A-P-R/S-R-R. |
| Starting Page | 460 |
| Ending Page | 467 |
| Page Count | 8 |
| File Format | |
| ISSN | 09462716 |
| Journal | Journal of Molecular Medicine |
| Volume Number | 78 |
| Issue Number | 8 |
| e-ISSN | 14321440 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2000-08-02 |
| Publisher Place | Berlin/Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Molecular Medicine Human Genetics Internal Medicine |
| Content Type | Text |
| Resource Type | Article |
| Subject | Drug Discovery Molecular Medicine Genetics (clinical) |
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