The tumor suppressor candidate p33(ING1) mediates repair of UV-damaged DNA - PubMed (original) (raw)
. 2001 Jul 1;61(13):4974-7.
Affiliations
- PMID: 11431327
The tumor suppressor candidate p33(ING1) mediates repair of UV-damaged DNA
K J Cheung Jr et al. Cancer Res. 2001.
Abstract
The biological functions of the tumor suppressor, ING1, have been studied extensively in the last 5 years since it was cloned. It shares many biological functions with those of p53 and has been reported to mediate growth arrest, senescence, apoptosis, anchorage-dependent growth, and chemosensitivity. Some of these functions, such as cell cycle arrest and apoptosis, have been shown to be dependent on the activity of both ING1 and p53 proteins. In this study, we report that p33(ING1) (one of ING1 isoforms) is also involved in the modulation of DNA repair. We found that overexpression of p33(ING1) enhances repair of UV-damaged DNA and that p53 is required for the repair process. Furthermore, binding between ING1 and GADD45 has been detected. These observations suggest that p33(ING1) cooperates with p53 in nucleotide excision repair and that GADD45 may be one of its components.
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