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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nolte, M. Lipscomb, W. N. Goelz, S. Karpusas, M. Benton, C. B. Meier, W. |
| Description | Author Affiliation: Karpusas M ( Biogen, Inc., 12 Cambridge Center, Cambridge, MA 02142, USA. Michael_Karpusas@biogen.com); |
| Abstract | Type I interferons (IFNs) are helical cytokines that have diverse biological activities despite the fact that they appear to interact with the same receptor system. To achieve a better understanding of the structural basis for the different activities of alpha and beta IFNs, we have determined the crystal structure of glycosylated human IFN-beta at 2.2-A resolution by molecular replacement. The molecule adopts a fold similar to that of the previously determined structures of murine IFN-beta and human IFN-alpha2b but displays several distinct structural features. Like human IFN-alpha2b, human IFN-beta contains a zinc-binding site at the interface of the two molecules in the asymmetric unit, raising the question of functional relevance for IFN-beta dimers. However, unlike the human IFN-alpha2b dimer, in which homologous surfaces form the interface, human IFN-beta dimerizes with contact surfaces from opposite sides of the molecule. The relevance of the structure to the effects of point mutations in IFN-beta at specific exposed residues is discussed. A potential role of ligand-ligand interactions in the conformational assembly of IFN receptor components is discussed. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 22 |
| Volume Number | 94 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1997-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Glycoproteins Chemistry Interferon-beta Computer Simulation Crystallography, X-Ray DNA Mutational Analysis Dimerization Interferons Models, Molecular Molecular Sequence Data Mutagenesis Protein Conformation Comparative Study Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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