Plants fix DNA differently from animals

p53 is a famous tumor suppressor in mammalian cells. The equivalent in plants is SUPPRESSOR OF GAMMA RESPONSE 1 (SOG1). Japanese scientists report that although the two factors interact with genes responsible for the cell cycle and DNA repair, SOG1 prefers genes regulating homologous recombination. Also, unlike p53, SOG1 has immune function. Because of its role in plant cell division and death, modulating SOG1 is expected to have implications in agriculture.
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