1usn: Difference between revisions
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==Overview== | ==Overview== | ||
The binding of two 5-substituted-1,3,4-thiadiazole-2-thione inhibitors to, the matrix metalloproteinase stromelysin (MMP-3) have been characterized, by protein crystallography. Both inhibitors coordinate to the catalytic, zinc cation via an exocyclic sulfur and lay in an unusual position across, the unprimed (P1-P3) side of the proteinase active site. Nitrogen atoms in, the thiadiazole moiety make specific hydrogen bond interactions with, enzyme structural elements that are conserved across all enzymes in the, matrix metalloproteinase class. Strong hydrophobic interactions between, the inhibitors and the side chain of tyrosine-155 appear to be responsible, for the very high selectivity of these inhibitors for stromelysin. In, these enzyme/inhibitor complexes, the S1' enzyme subsite is .. | The binding of two 5-substituted-1,3,4-thiadiazole-2-thione inhibitors to, the matrix metalloproteinase stromelysin (MMP-3) have been characterized, by protein crystallography. Both inhibitors coordinate to the catalytic, zinc cation via an exocyclic sulfur and lay in an unusual position across, the unprimed (P1-P3) side of the proteinase active site. Nitrogen atoms in, the thiadiazole moiety make specific hydrogen bond interactions with, enzyme structural elements that are conserved across all enzymes in the, matrix metalloproteinase class. Strong hydrophobic interactions between, the inhibitors and the side chain of tyrosine-155 appear to be responsible, for the very high selectivity of these inhibitors for stromelysin. In, these enzyme/inhibitor complexes, the S1' enzyme subsite is unoccupied. A, conformational rearrangement of the catalytic domain occurs that reveals, an inherent flexibility of the substrate binding region leading to, speculation about a possible mechanism for modulation of stromelysin, activity and selectivity. | ||
==About this Structure== | ==About this Structure== | ||
1USN is a | 1USN is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with ZN, CA and IN9 as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Stromelysin_1 Stromelysin 1], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.24.17 3.4.24.17] Structure known Active Sites: CA1, CA2, CA3, INH, ZN1 and ZN2. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1USN OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: metalloprotease]] | [[Category: metalloprotease]] | ||
''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 15:04:41 2007'' | ||
