Abstract
Growth arrest and DNA damage 45 (Gadd45) family genes, Gadd45A, Gadd45B, and GADD45 G are implicated as stress sensors that are rapidly induced upon genotoxic/physiological stress. They are involved in regulation of various cellular functions such as DNA repair, senescence, and cell cycle control. Gadd45 family of genes serve as tumor suppressors in response to different stimuli and defects in Gadd45 pathway can give rise to oncogenesis. More recently, Gadd45 has been shown to promote gene activation by demethylation and this function is important for transcriptional regulation and differentiation during development. Gadd45 serves as an adaptor for DNA repair factors to promote removal of 5-methylcytosine from DNA at gene specific loci. Therefore, Gadd45 serves as a powerful link between DNA repair and epigenetic gene regulation.
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