1c8t
From Proteopedia
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|PDB= 1c8t |SIZE=350|CAPTION= <scene name='initialview01'>1c8t</scene>, resolution 2.60Å | |PDB= 1c8t |SIZE=350|CAPTION= <scene name='initialview01'>1c8t</scene>, resolution 2.60Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=TR1:2-(2-{2-[(BIPHENYL-4-YLMETHYL)-AMINO]-3-MERCAPTO-PENTANOYLAMINO}-ACETYLAMINO)-3-METHYL-BUTYRIC+ACID+METHYL+ESTER'>TR1</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> |
| - | |ACTIVITY= [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] | + | |ACTIVITY= <span class='plainlinks'>[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] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1slm|1SLM]], [[1hfs|1HFS]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1c8t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1c8t OCA], [http://www.ebi.ac.uk/pdbsum/1c8t PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1c8t RCSB]</span> | ||
}} | }} | ||
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==Overview== | ==Overview== | ||
Human stromelysin-1 is a member of the matrix metalloproteinase (MMP) family of enzymes. The active site glutamic acid of the MMPs is conserved throughout the family and plays a pivotal role in the catalytic mechanism. The structural and functional consequences of a glutamate to glutamine substitution in the active site of stromelysin-1 were investigated in this study. In contrast to the wild-type enzyme, the glutamine-substituted mutant was not active in a zymogram assay where gelatin was the substrate, was not activated by organomercurials and showed no activity against a peptide substrate. The glutamine-substituted mutant did, however, bind to TIMP-1, the tissue inhibitor of metalloproteinases, after cleavage of the propeptide with trypsin. A second construct containing the glutamine substitution but lacking the propeptide was also inactive in the proteolysis assays and capable of TIMP-1 binding. X-ray structures of the wild-type and mutant proteins complexed with the propeptide-based inhibitor Ro-26-2812 were solved and in both structures the inhibitor binds in an orientation the reverse of that of the propeptide in the pro-form of the enzyme. The inhibitor makes no specific interactions with the active site glutamate and a comparison of the wild-type and mutant structures revealed no major structural changes resulting from the glutamate to glutamine substitution. | Human stromelysin-1 is a member of the matrix metalloproteinase (MMP) family of enzymes. The active site glutamic acid of the MMPs is conserved throughout the family and plays a pivotal role in the catalytic mechanism. The structural and functional consequences of a glutamate to glutamine substitution in the active site of stromelysin-1 were investigated in this study. In contrast to the wild-type enzyme, the glutamine-substituted mutant was not active in a zymogram assay where gelatin was the substrate, was not activated by organomercurials and showed no activity against a peptide substrate. The glutamine-substituted mutant did, however, bind to TIMP-1, the tissue inhibitor of metalloproteinases, after cleavage of the propeptide with trypsin. A second construct containing the glutamine substitution but lacking the propeptide was also inactive in the proteolysis assays and capable of TIMP-1 binding. X-ray structures of the wild-type and mutant proteins complexed with the propeptide-based inhibitor Ro-26-2812 were solved and in both structures the inhibitor binds in an orientation the reverse of that of the propeptide in the pro-form of the enzyme. The inhibitor makes no specific interactions with the active site glutamate and a comparison of the wild-type and mutant structures revealed no major structural changes resulting from the glutamate to glutamine substitution. | ||
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| - | ==Disease== | ||
| - | Known diseases associated with this structure: Coronary heart disease, susceptibility to OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=185250 185250]] | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Steele, D L.]] | [[Category: Steele, D L.]] | ||
[[Category: el-Kabbani, O.]] | [[Category: el-Kabbani, O.]] | ||
| - | [[Category: CA]] | ||
| - | [[Category: TR1]] | ||
| - | [[Category: ZN]] | ||
[[Category: mutant protein]] | [[Category: mutant protein]] | ||
[[Category: protein-inhibitor complex]] | [[Category: protein-inhibitor complex]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 19:17:02 2008'' |
Revision as of 16:17, 30 March 2008
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| , resolution 2.60Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , | ||||||
| Activity: | Stromelysin 1, with EC number 3.4.24.17 | ||||||
| Related: | 1SLM, 1HFS
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
HUMAN STROMELYSIN-1 (E202Q) CATALYTIC DOMAIN COMPLEXED WITH RO-26-2812
Overview
Human stromelysin-1 is a member of the matrix metalloproteinase (MMP) family of enzymes. The active site glutamic acid of the MMPs is conserved throughout the family and plays a pivotal role in the catalytic mechanism. The structural and functional consequences of a glutamate to glutamine substitution in the active site of stromelysin-1 were investigated in this study. In contrast to the wild-type enzyme, the glutamine-substituted mutant was not active in a zymogram assay where gelatin was the substrate, was not activated by organomercurials and showed no activity against a peptide substrate. The glutamine-substituted mutant did, however, bind to TIMP-1, the tissue inhibitor of metalloproteinases, after cleavage of the propeptide with trypsin. A second construct containing the glutamine substitution but lacking the propeptide was also inactive in the proteolysis assays and capable of TIMP-1 binding. X-ray structures of the wild-type and mutant proteins complexed with the propeptide-based inhibitor Ro-26-2812 were solved and in both structures the inhibitor binds in an orientation the reverse of that of the propeptide in the pro-form of the enzyme. The inhibitor makes no specific interactions with the active site glutamate and a comparison of the wild-type and mutant structures revealed no major structural changes resulting from the glutamate to glutamine substitution.
About this Structure
1C8T is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Expression, characterization and structure determination of an active site mutant (Glu202-Gln) of mini-stromelysin-1., Steele DL, El-Kabbani O, Dunten P, Windsor LJ, Kammlott RU, Crowther RL, Michoud C, Engler JA, Birktoft JJ, Protein Eng. 2000 Jun;13(6):397-405. PMID:10877850
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