The X-ray crystal structure of the carboxypeptidase A-L-benzylsuccinate complex has been refined at 2.0 A resolution to a final R-factor of 0.166. One molecule of the inhibitor binds to the enzyme active site. The terminal carboxylate forms a salt link with the guanidinium group of Arg145 and hydrogen bonds with Tyr248 and Asn144. The second carboxylate group binds to the zinc ion in an asymmetric bidentate fashion replacing the water molecule of the native structure. The zinc ion moves 0.5 A from its position in the native structure to accommodate the inhibitor binding. The overall stereochemistry around the zinc can be considered a distorted tetrahedron, although six atoms of the co-ordinated groups lie within 3.0 A from the zinc ion. The key for the strong inhibitory properties of L-benzylsuccinate can be found in its ability both to co-ordinate the zinc and to form a short carboxyl-carboxylate-type hydrogen bond (2.5 A) with Glu270.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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