NAD-dependent isocitrate dehydrogenase (IDH) is a Krebs cycle enzyme situated in mitochondria. In Arabidopsis thaliana, five genes encode functional IDH subunits that can be classed into two groups based on gene structure and subunit amino acid sequence. Arabidopsis contains two 'catalytic' and three 'regulatory' subunits according to their homology with yeast IDH. To date, an active IDH is believed to be heteromeric, containing at least one of each subunit type. This was verified in Arabidopsis by the complementation of yeast IDH mutants with the different Arabidopsis IDH-encoding cDNAs. Indeed, a single 'catalytic' and 'regulatory' subunit was sufficient to restore acetate growth of the yeast IDH double mutant. To gain information on possible IDH subunit interactions in planta, Arabidopsis IDH gene expression was analysed by Northern blot, PCR on cDNA libraries, in silico and in 'promoter'-reporter gene transgenic plants. Four of the IDH genes were expressed in all plant organs tested, while one gene (At4g35650) was not expressed in vegetative organs but was mainly expressed in the pollen. In leaves, the IDH genes were highly expressed in the veins, and to a lesser extent in mesophyll cells. The data are discussed with respect to IDH in other plant species.
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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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