1hfc: Difference between revisions
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|PDB= 1hfc |SIZE=350|CAPTION= <scene name='initialview01'>1hfc</scene>, resolution 1.5Å | |PDB= 1hfc |SIZE=350|CAPTION= <scene name='initialview01'>1hfc</scene>, resolution 1.5Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand= | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=PLH:METHYLAMINO-PHENYLALANYL-LEUCYL-HYDROXAMIC+ACID'>PLH</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> | ||
|ACTIVITY= [http://en.wikipedia.org/wiki/Interstitial_collagenase Interstitial collagenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.24.7 3.4.24.7] | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Interstitial_collagenase Interstitial collagenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.24.7 3.4.24.7] </span> | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY= | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1hfc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1hfc OCA], [http://www.ebi.ac.uk/pdbsum/1hfc PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1hfc RCSB]</span> | |||
}} | }} | ||
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==Overview== | ==Overview== | ||
The X-ray crystal structure of a 19 kDa active fragment of human fibroblast collagenase has been determined by the multiple isomorphous replacement method and refined at 1.56 A resolution to an R-factor of 17.4%. The current structure includes a bound hydroxamate inhibitor, 88 waters and three metal atoms (two zincs and a calcium). The overall topology of the enzyme, comprised of a five stranded beta-sheet and three alpha-helices, is similar to the thermolysin-like metalloproteinases. There are some important differences between the collagenase and thermolysin families of enzymes. The active site zinc ligands are all histidines (His-218, His-222, and His-228). The presence of a second zinc ion in a structural role is a unique feature of the matrix metalloproteinases. The binding properties of the active site cleft are more dependent on the main chain conformation of the enzyme (and substrate) compared with thermolysin. A mechanism of action for peptide cleavage similar to that of thermolysin is proposed for fibroblast collagenase. | The X-ray crystal structure of a 19 kDa active fragment of human fibroblast collagenase has been determined by the multiple isomorphous replacement method and refined at 1.56 A resolution to an R-factor of 17.4%. The current structure includes a bound hydroxamate inhibitor, 88 waters and three metal atoms (two zincs and a calcium). The overall topology of the enzyme, comprised of a five stranded beta-sheet and three alpha-helices, is similar to the thermolysin-like metalloproteinases. There are some important differences between the collagenase and thermolysin families of enzymes. The active site zinc ligands are all histidines (His-218, His-222, and His-228). The presence of a second zinc ion in a structural role is a unique feature of the matrix metalloproteinases. The binding properties of the active site cleft are more dependent on the main chain conformation of the enzyme (and substrate) compared with thermolysin. A mechanism of action for peptide cleavage similar to that of thermolysin is proposed for fibroblast collagenase. | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Smith, D L.]] | [[Category: Smith, D L.]] | ||
[[Category: Spurlino, J C.]] | [[Category: Spurlino, J C.]] | ||
[[Category: metalloprotease]] | [[Category: metalloprotease]] | ||
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