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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Mori, Y. Kano, K. Mathews, F. S. Kuroda, S. Ikeda, T. Kawaguchi, K. Chen, Z. W. Tanizawa, K. Datta, S. Takagi, K. Okajima, T. |
| Description | Author Affiliation: Datta S ( Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110, USA.); |
| Abstract | The crystal structure of the heterotrimeric quinohemoprotein amine dehydrogenase from Paracoccus denitrificans has been determined at 2.05-A resolution. Within an 82-residue subunit is contained an unusual redox cofactor, cysteine tryptophylquinone (CTQ), consisting of an orthoquinone-modified tryptophan side chain covalently linked to a nearby cysteine side chain. The subunit is surrounded on three sides by a 489-residue, four-domain subunit that includes a diheme cytochrome c. Both subunits sit on the surface of a third subunit, a 337-residue seven-bladed beta-propeller that forms part of the enzyme active site. The small catalytic subunit is internally crosslinked by three highly unusual covalent cysteine to aspartic or glutamic acid thioether linkages in addition to the cofactor crossbridge. The catalytic function of the enzyme as well as the biosynthesis of the unusual catalytic subunit is discussed. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 25 |
| Volume Number | 98 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2001-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Oxidoreductases Acting On CH-NH Group Donors Chemistry Paracoccus Denitrificans Enzymology Amino Acid Sequence Catalytic Domain Coenzymes Biosynthesis Cross-Linking Reagents Crystallography, X-Ray Models, Molecular Molecular Sequence Data Molecular Structure Oxidation-Reduction Genetics Protein Structure, Quaternary Protein Subunits Sequence Homology, Amino Acid Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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