Rtt109 (Regulator of Ty1 Transposition 109) is a fungal-specific histone acetyltransferase required for modification of histone H3 K9, K27 and K56. These acetylations are associated with nascent histone H3 and play an integral role in replication-coupled and repair-coupled nucleosome assembly. Rtt109 is unique among acetyltransferases as it is activated by a histone chaperone; either Vps75 (Vacuolar Protein Sorting 75) or Asf1 (Anti-silencing Function 1). Recent biochemical, structural and genetic studies have shed light on the intricacies of this activation. It is now clear that Rtt109-Asf1 acetylates K56, while Rtt109-Vps75 acetylates K9 and K27. This reinforces that Asf1 and Vps75 activate Rtt109 via distinct molecular mechanisms. Structures of Rtt109-Vps75 further imply that Vps75 positions histone H3 in the Rtt109 active site. These structures however raise questions regarding the stoichiometry of the Rtt109-Vps75 complex. This has ramifications for determining the physiological Rtt109 substrate.
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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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