PBX1（PBX homeobox 1），癌症关联基因，基因ID：5087，该基因编码一种核蛋白，属于PBX同源盒转录因子家族对小鼠的研究表明，该基因可能参与了成骨的调节，并为骨骼模式和程序设计所必需染色体易位t（1；19）涉及该基因和TCF3/E2A基因，与B细胞前急性淋巴细胞白血病相关由此产生的融合蛋白，其中E2A的DNA结合域被该蛋白的DNA结合域取代，通过组成性激活PBX蛋白家族调控的基因转录来转化细胞另外，已经发现该基因编码不同亚型的剪接转录变体[由RefSeq提供，2017年6月]This gene encodes a nuclear protein that belongs to the PBX homeobox family of transcriptional factors. Studies in mice suggest that this gene may be involved in the regulation of osteogenesis and required for skeletal patterning and programming. A chromosomal translocation， t(1;19) involving this gene and TCF3/E2A gene， is associated with pre-B-cell acute lymphoblastic leukemia. The resulting fusion protein， in which the DNA binding domain of E2A is replaced by the DNA binding domain of this protein， transforms cells by constitutively activating transcription of genes regulated by the PBX protein family. Alternatively spliced transcript variants encoding different isoforms have been found f。