Kex2 is the yeast prototype of a large family of serine proteases that are highly specific for cleavage of their peptide substrates C-terminal to paired basic sites. This paper reports the 2.2 A resolution crystal structure of ssKex2 in complex with an Ac-Arg-Glu-Lys-Arg peptidyl boronic acid inhibitor (R = 19.7, R(free) = 23.4). By comparison of this structure with the structure of the mammalian homologue furin [Henrich, S., et al. (2003) Nat. Struct. Biol. 10, 520-526], we suggest a structural basis for the differences in substrate recognition at the P(2) and P(4) positions between Kex2 and furin and provide a structural rationale for the lack of P(6) recognition in Kex2. In addition, several monovalent cation binding sites are identified, and a mechanism of activation of Kex2 by potassium ion is proposed.
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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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