The DiGeorge syndrome (DGS) is a developmental disorder affecting derivatives of the third and fourth pharyngeal pouches. DGS patients present an interstitial deletion in one of their two chromosomes 22. Cosmid DAC30 was mapped to the DGS smallest critical region. Iterative cDNA library screening initiated with a DAC30 gene fragment candidate yielded a cDNA contig whose assembled nucleotide sequence is consistent with the widely transcribed, 4.2-4.4 kb long, messengers detected by northern analysis. The deduced protein sequence, 1017 amino acids in length, entirely encompasses the 766 amino acids previously designated as TUPLE1. The completed protein has been renamed HIRA because it contains various features matching those found in HIR1 and HIR2, two repressors of histone gene transcription characterized in the yeast Saccharomyces cerevisiae. Strikingly alike in their N-terminal third, HIRA and HIR1 contain seven copies of the WD repeat, a motif implicated in protein-protein interactions, suggesting that they might define a new subfamily of functionally homologous proteins. The remainder of the human polypeptide highly resembles a corresponding fragment in HIR2. We propose that HIRA, alone, could have a part in mechanisms of transcriptional regulation similar to that played by HIR1 and HIR2 together. The presence of a single copy of the HIRA gene in DGS patients possibly accounts for some of the abnormalities associated with this syndrome.
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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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