Iron-sulfur proteins play physiologically important roles in a variety of metabolic processes in eukaryotes. In plants, iron-sulfur cluster biosynthesis is known to take place both in mitochondria and chloroplasts. However no components that mediate iron-sulfur cluster delivery in the plant cell cytosol have been identified so far. Here we report identification and characterization of a cytosolic Nbp35 homolog named AtNbp35 from Arabidopsis thaliana. AtNbp35-deficient Arabidopsis mutants were seedling lethal. Unlike the previously characterized yeast ScNbp35 which forms a heterotetramer with ScCfd1, AtNbp35 forms a homodimer in the cytosol and can harbor both [4Fe-4S] and [2Fe-2S] clusters on its amino- and carboxyl-terminal domains, respectively. Taken together, our data suggest that Nbp35 plays a pivotal role in iron-sulfur cluster assembly and delivery in the plant cell cytosol as a bifunctional molecular scaffold.
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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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