Tip60 Is Required for DNA Interstrand Cross-link Repair in the Fanconi Anemia Pathway
| Autor: | Susan B. Olson, Muhsen Al-Dhalimy, Lauren Mathewson, Megan L. Holtorf, Robb E. Moses, James Hejna, Jennie Hines, Aaron Hemphill |
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| Rok vydání: | 2008 |
| Předmět: |
DNA Interstrand Cross-Link Repair
Genome instability congenital hereditary and neonatal diseases and abnormalities Fanconi anemia complementation group C DNA Repair Cell Survival DNA repair DNA damage Mitomycin Active Transport Cell Nucleus Biology Biochemistry Genomic Instability Lysine Acetyltransferase 5 Chromatin remodeling Cell Line Fanconi anemia hemic and lymphatic diseases FANCD2 medicine Humans Molecular Biology Histone Acetyltransferases Cell Nucleus Fanconi Anemia Complementation Group D2 Protein Ubiquitination nutritional and metabolic diseases Cell Biology Chromatin Assembly and Disassembly medicine.disease Molecular biology Cell biology Cross-Linking Reagents Fanconi Anemia DNA: Replication Repair Recombination and Chromosome Dynamics DNA Damage |
| Zdroj: | Journal of Biological Chemistry. 283:9844-9851 |
| ISSN: | 0021-9258 |
| DOI: | 10.1074/jbc.m709076200 |
| Popis: | The disease Fanconi anemia is a genome instability syndrome characterized by cellular sensitivity to DNA interstrand cross-linking agents, manifest by decreased cellular survival and chromosomal aberrations after such treatment. There are at least 13 proteins acting in the pathway, with the FANCD2 protein apparently functioning as a late term effecter in the maintenance of genome stability. We find that the chromatin remodeling protein, Tip60, interacts directly with the FANCD2 protein in a yeast two-hybrid system. This interaction has been confirmed by co-immunoprecipitation and co-localization using both endogenous and epitope-tagged FANCD2 and Tip60 from human cells. The observation of decreased cellular survival after exposure to mitomycin C in normal fibroblasts depleted for Tip60 indicates a direct function in interstrand cross-link repair. The coincident function of Tip60 and FANCD2 in one pathway is supported by the finding that depletion of Tip60 in Fanconi anemia cells does not increase sensitivity to DNA cross-links. However, depletion of Tip60 did not reduce monoubiquitination of FANCD2 or its localization to nuclear foci following DNA damage. The observations indicate that Fanconi anemia proteins act in concert with chromatin remodeling functions to maintain genome stability after DNA cross-link damage. |
| Databáze: | OpenAIRE |
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