Loading...
Please wait, while we are loading the content...
Similar Documents
Sensing DNA damage through ATRIP recognition of RPA-ssDNA complexes.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zou, L. Q. Elledge, Stephen J. |
| Copyright Year | 2003 |
| Abstract | The function of the ATR (ataxia-telangiectasia mutated- and Rad3-related)-ATRIP (ATR-interacting protein) protein kinase complex is crucial for the cellular response to replication stress and DNA damage. Here, we show that replication protein A (RPA), a protein complex that associates with single-stranded DNA (ssDNA), is required for the recruitment of ATR to sites of DNA damage and for ATR-mediated Chk1 activation in human cells. In vitro, RPA stimulates the binding of ATRIP to ssDNA. The binding of ATRIP to RPA-coated ssDNA enables the ATR-ATRIP complex to associate with DNA and stimulates phosphorylation of the Rad17 protein that is bound to DNA. Furthermore, Ddc2, the budding yeast homolog of ATRIP, is specifically recruited to double-strand DNA breaks in an RPA-dependent manner. A checkpoint-deficient mutant of RPA, rfa1-t11, is defective for recruiting Ddc2 to ssDNA both in vivo and in vitro. Our data suggest that RPA-coated ssDNA is the critical structure at sites of DNA damage that recruits the ATR-ATRIP complex and facilitates its recognition of substrates for phosphorylation and the initiation of checkpoint signaling. |
| Starting Page | 67 |
| Ending Page | 74 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://science.sciencemag.org/content/suppl/2003/06/05/300.5625.1542.DC1/zou.SOM.pdf |
| PubMed reference number | 12791985v1 |
| Volume Number | 300 |
| Issue Number | 5625 |
| Journal | Science |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | ATR protein, human ATR-ATRIP complex ATRIP gene Ataxia Telangiectasia Cell Cycle Checkpoints Cognitive function: initiation DNA Breaks DNA Breaks, Double-Stranded DNA Breaks, Single-Stranded DNA Damage DNA, Single-Stranded Episodic ataxia type 2 (disorder) Protein Kinases Saccharomycetales Staphylococcal Protein A Telangiectasis |
| Content Type | Text |
| Resource Type | Article |
