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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

P210 BCR-ABL is complexed to P160 BCR and ph-P53 proteins in K562 cells.

The BCR gene (Groffen et al., 1984) plays a critical role in the pathogenesis of human leukemias that involve the Philadelphia chromosome (Ph1) (Rowley, 1973; Nowell & Hungerford, 1960). Cells containing the Ph1 contain a chimeric gene formed from the fusion of BCR (Collins et al., 1987; Lifshitz et al. 1988) and ABL genes that results from the reciprocal translocation of segments of chromosomes 9 and 22 (Shtivelman et al., 1985). The product of this chimera is a 210 kDa protein, termed P210 BCR-ABL, that possesses an activated tyrosine kinase activity (Konopka et al., 1984; Kloetzer et al., 1985). Studies using long-term marrow culture systems and retrovirus-mediated gene transfer have documented that P210 BCR-ABL can stimulate the growth of immature hematopoietic precursor cell types (McLaughlin et al., 1987; Young & Witte, 1984). We have previously reported that P210 BCR-ABL exists in cytoplasmic complexes in association with a 53 kDa protein termed ph-P53 (Maxwell et al., 1987; Li et al. 1988). Similarly, BCR proteins have been found in cytoplasmic complexes containing ph-P53 in cells lacking the Ph1 (Li et al., 1989). These BCR protein complexes possess an associated ser/thr protein kinase activity. In this same study, we found that P210-containing complexes phosphorylate BCR proteins on tyrosine residues in vitro (Li et al., 1989). We now present results which demonstrate that P210 BCR-ABL is tightly associated with P160 BCR and ph-P53 proteins in cytoplasmic complexes from cells containing the Ph1.[1]

References

  1. P210 BCR-ABL is complexed to P160 BCR and ph-P53 proteins in K562 cells. Campbell, M.L., Li, W., Arlinghaus, R.B. Oncogene (1990) [Pubmed]
 
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