Gene I of cauliflower mosaic virus (CaMV) encodes a protein that is required for virus movement. The CaMV movement protein (MP) was used in a yeast 2-hybrid system to screen an Arabidopsis cDNA library for cDNAs encoding MP-interacting (MPI) proteins. Three different clones were found encoding proteins (MPI1, -2 and -7) that interact with the N-terminal third of the CaMV MP. The interaction in the 2-hybrid system between MPI7 and CaMV MP mutants correlated with the infectivity of the mutants. A non-infectious MP mutant, ER2A, with two amino acid changes in the N-terminal third of the MP failed to interact with MPI7, while an infectious second-site mutant, that differed from ER2A by only a single amino acid change, interacted in the 2-hybrid system. MPI7 is encoded by a member of a large, but diverse gene family in Arabidopsis. MPI7 is related in sequence, size and hydropathy profile to mammalian proteins (such as rat PRA1) described as a rab acceptor. The gene encoding MPI7 is expressed widely is Arabidopsis plants. and in transgenic plants the MPI7:GFP fusion protein is localized in the cytoplasm, concentrated in punctate spots. In protoplasts transfected with CFP:MP and MPI7:YFP, CFP:MP colocalized to some of the sites where MPI7:YFP is expressed. At these sites, fluorescence resonance energy transfer (FRET) between fluorophores was observed indicating an interaction in planta between the CaMV MP and MPI7.
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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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