We demonstrate that ANJ1, a higher plant homolog of the bacterial molecular chaperone DnaJ, is a substrate in vitro for protein farnesyl- and geranylgeranyl-transferase activities present in cell extracts of the plant Atriplex nummularia and yeast Saccharomyces cerevisiae. Isoprenylation did not occur when cysteine was replaced by serine in the CAQQ motif at the carboxyl terminus of ANJ1, indicating that this sequence functions as a CaaX consensus sequence for polyisoprenylation (where C is cysteine, a is an aliphatic residue, and X is any amino acid residue). Substitution of leucine for the terminal glutamine did not result in the expected geranylgeranylation as occurs with mammalian proteins containing a carboxyl-terminal leucine. Unlike the wild-type ANJ1, neither of the proteins containing these amino acid substitutions could functionally complement the yeast temperature-sensitive mutant mas5. Farnesylation enhanced the association of ANJ1 with A. nummularia microsomal membranes. Electrophoretic mobility of ANJ1 from the plant indicated that the protein is isoprenylated in vivo.
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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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