The protein encoded by this gene is a multifunctional , nuclear phosphoprotein that plays a role in cell cycle progression , apoptosis and cellular transformation. It functions as a transcription factor that regulates transcription of specific target genes. Mutations , overexpression , rearrangement and translocation of this gene have been associated with a variety of hematopoietic tumors , leukemias and lymphomas , including Burkitt lymphoma. There is evidence to show that alternative translation initiations from an upstream , in-frame non-AUG (CUG) and a downstream AUG start site result in the production of two isoforms with distinct N-termini. The synthesis of non-AUG initiated protein is suppressed in Burkitt's lymphomas , suggesting its importance in the normal function of this gene. [provided by RefSeq , Jul 2008] ,
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