RBP2 was originally identified as a retinoblastoma binding protein. It is also known as JARID1A (Jumonji, AT rich interactive domain 1A). RBP2 plays both negative and positive roles in RB-mediated transcriptional activation, depending on the kinds of genes and regulates differentiation by its function as an H3K4 histone demethylase (1, 2 & 3).
Figure Identification of RBP2 in crude cell extracts by Western blotting with antibody 9A6.
Samples:
1. HeLa control siRNA
2. HeLa RBP2 siRNA
3. MCF7
4. U2OS
5. NIH3T3 6. J1 (mouse ES)
A. SDS-PAGE with CBB staining B. Western blotting (detection: ECL)
References
Lopez-Bigas N et al “Genome-wide analysis of the H3K4 histone demethylase RBP2 reveals atranscriptional program controlling differentiation” Moll Cell 31: 520-530 (2008) PMID: 18722178
Klose RJ et al “The retinoblastoma binding protein BRP2 is an H3K4 demethylase” Cell 128: 889-900 (2007) PMID: 17320163
Christensen J et al “RBP2 belongs to a family of demethylases, specific for tri- and dimethylated lysine 4 on histone 3” Cell 128:1063-1076 (2007) PMID: 17320161