The mixed-lineage leukemia (MLL1/ALL-1/HRX) histone methyltransferase is involved in the epigenetic maintenance of transcriptional memory and the pathogenesis of human leukemias. To understand its role in cell type specification, we determined the human genomic binding sites of MLL1. We found that MLL1 functions as a human equivalent of yeast Set1. Like Set1, MLL1 localizes with RNA polymerase II (Pol II) to the 5' end of actively transcribed genes, where histone H3 lysine 4 trimethylation occurs. Consistent with this global role in transcription, MLL1 also localizes to microRNA (miRNA) loci that are involved in leukemia and hematopoiesis. In contrast to the 5' proximal binding behavior at most protein-coding genes, MLL1 occupies an extensive domain within a transcriptionally active region of the HoxA cluster. The ability of MLL1 to serve as a start site-specific global transcriptional regulator and to participate in larger chromatin domains at the Hox genes reveals dual roles for MLL1 in maintenance of cellular identity.
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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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| Evidence ID | Analyze ID | File | Description |
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