PBX1 Antibody – Mouse Monoclonal

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, Jun 2017]

PBX1: 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. Forms a heterodimer with MEIS1 which binds DNA including a cAMP-responsive sequence in CYP17. Also forms heterotrimers with MEIS1 and a number of HOX proteins including HOXA9, HOXD4, HOXD9 and HOXD10. Interacts with PBXIP1. Expressed in all tissues except in cells of the B and T lineage. Belongs to the TALE/PBX homeobox family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Transcription factor; DNA-binding; Oncoprotein; Motility/polarity/chemotaxis

Chromosomal Location of Human Ortholog: 1q23

Cellular Component: nucleoplasm; transcription factor complex; cytoplasm; nucleus

Molecular Function: protein binding; DNA binding; protein heterodimerization activity; transcription factor binding; transcription factor activity

Biological Process: spleen development; transcription, DNA-dependent; thymus development; embryonic hemopoiesis; somatic stem cell maintenance; adrenal gland development; negative regulation of transcription factor activity; embryonic skeletal development; anterior/posterior pattern formation; negative regulation of neuron differentiation; ureteric bud branching; positive regulation of cell proliferation; positive regulation of transcription from RNA polymerase II promoter; regulation of ossification; steroid biosynthetic process; sex differentiation; proximal/distal pattern formation; embryonic limb morphogenesis