Anti-Bmi1 Antibody Picoband®

BMI1 (BMI1 polycomb ring finger oncogene), also known as RNF51, is a protein which in humans is encoded by the BMI1 gene. The Bmi1 gene is highly conserved in evolution as indicated by zoo blot hybridization with Bmi1 probes corresponding to the protein-encoding domain. By fluorescence in situ hybridization, the human BMI1 gene is assigned to chromosome 10p13. BMI1 has a key role in regulating the proliferative activity of normal stem and progenitor cells. Most importantly, they provided evidence that the proliferative potential of leukemic stem and progenitor cells lacking BMI1 is compromised because they eventually undergo proliferation arrest and show signs of differentiation and apoptosis, leading to transplant failure of the leukemia. Complementation studies showed that BMI1 completely rescues these proliferative defects. Deletion analysis showed that the RING finger and helix-turn-helix domains of BMI1 were required for life span extension and repression of the tumor suppressor p16 (INK4) . BMI1 selectively extended the life span of these cultures. Confocal microscopy showed that BMI1 transiently colocalized with centromeres during interphase in HeLa cells.

Cancer, Cancer Susceptibility, Cell Biology, Cell Cycle, Cell Differentiation,2339, Chromatin Remodeling, Epigenetics and Nuclear Signaling, Hematopoietic Progenitors, Oncoproteins, Oncoproteins/Suppressors, Proto-Oncogenes, Stem Cells, Transcription

Component of a Polycomb group (PcG) multiprotein PRC1- like complex, a complex class required to maintain the transcriptionally repressive state of many genes, including Hox genes, throughout development. PcG PRC1 complex acts via chromatin remodeling and modification of histones; it mediates monoubiquitination of histone H2A 'Lys-119', rendering chromatin heritably changed in its expressibility. In the PRC1 complex, it is required to stimulate the E3 ubiquitin-protein ligase activity of RNF2/RING2. .

1. Alkema, M. J., van der Lugt, N. M. T., Bobeldijk, R. C., Berns, A., van Lohuizen, M. Transformation of axial skeleton due to overexpression of bmi-1 in transgenic mice. Nature 374: 724-727, 1995. 2. Chagraoui, J., Niessen, S. L., Lessard, J., Girard, S., Coulombe, P., Sauvageau, M., Meloche, S., Sauvageau, G. E4F1: a novel candidate factor for mediating BMI1 function in primitive hematopoietic cells. Genes Dev. 20: 2110-2120, 2006. 3. Leung, C., Lingbeek, M., Shakhova, O., Liu, J., Tanger, E., Saremaslani, P., van Lohuizen, M., Marino, S. Bmi1 is essential for cerebellar development and is overexpressed in human medulloblastomas. Nature 428: 337-341, 2004.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.