1gwz: Difference between revisions
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==Overview== | ==Overview== | ||
The crystal structures of the protein-tyrosine phosphatase SHP-1 catalytic, domain and the complex it forms with the substrate analogue tungstate have, been determined and refined to crystallographic R values of 0.209 at 2.5 A, resolution and 0.207 at 2.8 A resolution, respectively. Despite low, sequence similarity, the catalytic domain of SHP-1 shows high similarity, in secondary and tertiary structures with other protein-tyrosine, phosphatases (PTPs). In contrast to the conformational changes observed in, the crystal structures of PTP1B and Yersinia PTP, the WPD loop, (Trp419-Pro428) in the catalytic domain of SHP-1 moves away from the, substrate binding pocket after binding the tungstate ion. Sequence, alignment and structural analysis suggest that the residues in the WPD, loop, .. | The crystal structures of the protein-tyrosine phosphatase SHP-1 catalytic, domain and the complex it forms with the substrate analogue tungstate have, been determined and refined to crystallographic R values of 0.209 at 2.5 A, resolution and 0.207 at 2.8 A resolution, respectively. Despite low, sequence similarity, the catalytic domain of SHP-1 shows high similarity, in secondary and tertiary structures with other protein-tyrosine, phosphatases (PTPs). In contrast to the conformational changes observed in, the crystal structures of PTP1B and Yersinia PTP, the WPD loop, (Trp419-Pro428) in the catalytic domain of SHP-1 moves away from the, substrate binding pocket after binding the tungstate ion. Sequence, alignment and structural analysis suggest that the residues in the WPD, loop, especially the amino acid following Asp421, are critical for the, movement of WPD loop on binding substrates and the specific activity of, protein-tyrosine phosphatases. Our mutagenesis and kinetic measurements, have supported this hypothesis. | ||
==About this Structure== | ==About this Structure== | ||
1GWZ is a | 1GWZ is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Active as [http://en.wikipedia.org/wiki/Protein-tyrosine-phosphatase Protein-tyrosine-phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.48 3.1.3.48] Structure known Active Site: WPD. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1GWZ OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: wpd loop]] | [[Category: wpd loop]] | ||
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov 5 12:36:39 2007'' | ||
