This gene belongs to a family of Sp1 related genes that encode transcription factors that regulate transcription by binding to consensus GC- and GT-box regulatory elements in target genes. This protein contains a zinc finger DNA-binding domain and several transactivation domains , and has been reported to function as a bifunctional transcription factor that either stimulates or represses the transcription of numerous genes. Transcript variants encoding different isoforms have been described for this gene , and one has been reported to initiate translation from a non-AUG (AUA) start codon. Additional isoforms , resulting from the use of alternate downstream translation initiation sites , have also been noted. A related pseudogene has been identified on chromosome 13. [provided by RefSeq , Feb 2010] ,
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