Yeast DNA coding for nucleosome assembly protein I (NAP-I), which facilitates nucleosome assembly in vitro at physiological ionic conditions, was cloned and its gene product was characterized. A monoclonal antibody against NAP-I (58 kDa) from human HeLa cells was used to screen a genomic library of Saccharomyces cerevisiae constructed into lambda gt11. A 60-kDa protein was detected by immunoblotting in the extracts of Escherichia coli lysogenized with a positive clone. The 60-kDa protein purified from the extracts had an activity equivalent to that of NAP-I from mouse and human cells. The amino acid sequence deduced from the gene coding for the yeast NAP-I defines a polypeptide of molecular mass 47,848 Da with three negatively charged regions. While the two regions contain 8 and 10 acidic amino acids out of 13 amino acid residues, the longest stretch has 15 glutamic and 13 aspartic acids out of 38 residues. These regions are probably involved in the interaction with histones. Proteins recognized by the anti-NAP-I antibody were also present in Xenopus oocytes and Drosophila cultured cells. Possible roles of NAP-I are discussed in relation to other nucleosome assembly proteins.
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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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