The actions of peptidase inhibitors derived from Streptomycete on human cathepsin A (hCath A), yeast carboxypeptidase Y (CPY), and wheat carboxypeptidase II (CPW) were analyzed comparatively. Lactacystin and omuralide (clasto-lactacystin beta-lactone), well-known cytoplasmic proteasome inhibitors, both had a potent and non-competitive inhibitory effect on these homologous serine carboxypeptidases, although they inhibited CPW and hCath A more effectively than CPY in vitro. Ebelactone B exhibited a mixed non-competitive inhibitory effect and selectivity for CPY. Piperastatin A showed competitive inhibition of CPY and hCath A but had little effect on CPW. In contrast, chymostatin inhibited CPW efficiently, while it had less effect on hCath A and CPY. In cell culture system, lactacystin was the most potent as to inactivation of the intralysosomal recombinant hCath A activity expressed in a genetically engineered fibroblastic cell line with galactosialidosis (hCath A deficiency). These results suggest that the specific inhibitory effects of lactacystin and its derivatives on hCath A might be applicable to elucidate the pathophysiological roles in the human deficinecy.
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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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