該基因編碼一種多功能蛋白質，位于細胞核和細胞質的多個位置。它與多種蛋白質相互作用，如凋亡抗原fas、著絲粒蛋白c和轉錄因子紅細胞增多癥病毒e26癌基因同源物1。在細胞核中，編碼的蛋白質作為一種與sumoylated轉錄因子結合的有效轉錄抑制因子發揮作用。它的抑制作用可以通過將這種蛋白質固定在早幼粒細胞白血病的核體或核仁中而得到緩解。這種蛋白也與g2期的著絲粒相聯系。在細胞質中，編碼蛋白可能起到調節細胞凋亡的作用。該蛋白的亞細胞定位和功能受翻譯后修飾的調控，包括sumoylation、磷酸化和多泛素化。選擇性剪接導致多個轉錄變體。[由RefSeq提供，2008年11月]
This gene encodes a multifunctional protein that resides in multiple locations in the nucleus and in the cytoplasm. It interacts with a wide variety of proteins, such as apoptosis antigen Fas, centromere protein C, and transcription factor erythroblastosis virus E26 oncogene homolog 1. In the nucleus, the encoded protein functions as a potent transcription repressor that binds to sumoylated transcription factors. Its repression can be relieved by the sequestration of this protein into promyelocytic leukemia nuclear bodies or nucleoli. This protein also associates with centromeres in G2 phase. In the cytoplasm, the encoded protein may function to regulate apoptosis. The subcellular localization and function of this protein are modulated by post-translational modifications, including sumoylation, phosphorylation and polyubiquitination. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2008]