BRCA1 is a 220-kDa nuclear phosphoprotein that is expressed and phosphorylated in a cell cycle-dependent manner - PubMed (original) (raw)
. 1996 Jul 15;56(14):3168-72.
Affiliations
- PMID: 8764100
BRCA1 is a 220-kDa nuclear phosphoprotein that is expressed and phosphorylated in a cell cycle-dependent manner
Y Chen et al. Cancer Res. 1996.
Erratum in
- Cancer Res 1996 Sep 1;56(17):4074
Abstract
Mouse polyclonal antibodies, raised against three regions of the human BRCA1 protein, were characterized and revealed BRCA1 as a 220-kDa nuclear phosphoprotein in normal cells. All three antisera recognize both in vitro-translated and recombinant, baculovirus-derived BRCA1, which co-migrate with BRCA1 from the human breast epithelia cell line, HBL100. BRCA1 expression and phosphorylation are shown to be cell cycle dependent, with greatest expression and phosphorylation occurring in S and M phases. Cyclin-dependent kinase 2 and other kinases associated with cyclins D and A are shown to bind to and phosphorylate BRCA1, suggesting that the biological activity of BRCA1 may be regulated by cyclin-dependent kinases.
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