We have designed, synthesized, and characterized a metal chelating compound that is based on the structure of cholesterol and contains the high affinity metal chelating group, lysine nitrilotriacetic acid (Lys-NTA). Using the enzyme isoprenylcysteine carboxylmethyltransferase (Icmt) from yeast as a model integral membrane metalloenzyme, we find that this agent potently inhibits Icmt activity with an IC(50) value between 35 and 75 microM, which is at least 40 times more potent than the best known Icmt metal chelating inhibitor, Zincon. We propose that the rigid hydrophobic cholesterol moiety promotes partitioning into the membrane, enabling the metal-binding NTA group(s) to inactivate the enzyme by metal chelation. Because this compound is based on a naturally occurring membrane lipid and appears to chelate metals buried deeply within water insoluble environments, this agent may also be useful as a general tool for identifying previously unappreciated metal dependencies of other classes of membrane proteins.
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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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| Evidence ID | Analyze ID | File | Description |
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