3TO0
Crystal structure of Mus musculus iodotyrosine deiodinase (IYD) C217A, C239A bound to FMN
Summary for 3TO0
| Entry DOI | 10.2210/pdb3to0/pdb |
| Related | 3GB5 3GFD 3GH8 3TNZ |
| Descriptor | Iodotyrosine deiodinase 1, FLAVIN MONONUCLEOTIDE, PHOSPHATE ION, ... (5 entities in total) |
| Functional Keywords | oxidoreductase, flavoprotein, membrane, transmembrane, dehalogenase, iodide salvage, mono-iodotyrosine, nadp |
| Biological source | Mus musculus (mouse) |
| Cellular location | Membrane; Single-pass membrane protein (By similarity): Q9DCX8 |
| Total number of polymer chains | 2 |
| Total formula weight | 61067.26 |
| Authors | Buss, J.M.,McTamney, P.M.,Rokita, S.E. (deposition date: 2011-09-02, release date: 2012-02-29, Last modification date: 2023-09-13) |
| Primary citation | Buss, J.M.,McTamney, P.M.,Rokita, S.E. Expression of a soluble form of iodotyrosine deiodinase for active site characterization by engineering the native membrane protein from Mus musculus. Protein Sci., 21:351-361, 2012 Cited by PubMed Abstract: Reductive deiodination is critical for thyroid function and represents an unusual exception to the more common oxidative and hydrolytic mechanisms of dehalogenation in mammals. Studies on the reductive processes have been limited by a lack of convenient methods for heterologous expression of the appropriate proteins in large scale. The enzyme responsible for iodide salvage in the thyroid, iodotyrosine deodinase, is now readily generated after engineering its gene from Mus musculus. High expression of a truncated derivative lacking the membrane domain at its N-terminal was observed in Sf9 cells, whereas expression in Pichia pastoris remained low despite codon optimization. Ultimately, the desired expression in Escherichia coli was achieved after replacing the two conserved Cys residues of the deiodinase with Ala and fusing the resulting protein to thioredoxin. This final construct provided abundant enzyme for crystallography and mutagenesis. Utility of the E. coli system was demonstrated by examining a set of active site residues critical for binding to the zwitterionic portion of substrate. PubMed: 22238141DOI: 10.1002/pro.2020 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.655 Å) |
Structure validation
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