Aliases for PBX1 Gene
External Ids for PBX1 Gene
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 for this gene. [provided by RefSeq, Mar 2011]
GeneCards Summary for PBX1 Gene
PBX1 (Pre-B-Cell Leukemia Homeobox 1) is a Protein Coding gene. Diseases associated with PBX1 include precursor b-cell acute lymphoblastic leukemia and lymphoblastic leukemia. Among its related pathways are PI3K-Akt signaling pathway and PI-3K cascade. GO annotations related to this gene include sequence-specific DNA binding transcription factor activity and protein heterodimerization activity. An important paralog of this gene is PBX3.
UniProtKB/Swiss-Prot for PBX1 Gene
Binds the sequence 5-ATCAATCAA-3. Acts as a transcriptional activator of PF4 in complex with MEIS1. Converted into a potent transcriptional activator by the (1;19) translocation. May have a role in steroidogenesis and, subsequently, sexual development and differentiation. Isoform PBX1b as part of a PDX1:PBX1b:MEIS2b complex in pancreatic acinar cells is involved in the transcriptional activation of the ELA1 enhancer; the complex binds to the enhancer B element and cooperates with the transcription factor 1 complex (PTF1) bound to the enhancer A element. Probably in complex with MEIS2, is involved in transcriptional regulation by KLF4. Acts as a transcriptional activator of NKX2-5 and a transcriptional repressor of CDKN2B. Together with NKX2-5, it is required for spleen development through a mechanism that involves CDKN2B repression (By similarity).