Due to its extensive length, DNA is packaged into a protective chromatin structure known as the nucleosome. In order to carry out various cellular functions, nucleosomes must be disassembled, allowing access to the underlying DNA, and subsequently reassembled on completion of these processes. The assembly and disassembly of nucleosomes is dependent on the function of histone modifiers, chromatin remodelers and histone chaperones. In this review, we discuss the roles of an evolutionarily conserved histone chaperone known as the HIR/HIRA complex. In S. cerevisiae, the HIR complex is made up of the proteins Hir1, Hir2, Hir3 and Hpc2, which collectively act in transcriptional regulation, elongation, gene silencing, cellular senescence and even aging. This review presents an overview of the role of the HIR complex, in yeast as well as other organisms, in each of these processes, in order to give a better understanding of how nucleosome assembly is imperative for cellular homeostasis and genomic integrity. This article is part of a Special Issue entitled: Histone chaperones and Chromatin assembly.
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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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