Characterization of estrogen-induced F-box protein FBXO45
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- Published online on: August 1, 2005 https://doi.org/10.3892/or.14.2.531
- Pages: 531-535
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Abstract
Members of the F-box protein family are characterized by an approximately 40-amino-acid F-box domain. SCF complexes, formed by Skp1, Cullin, and F-box proteins, act as protein-ubiquitin ligases. F-box proteins interact with Skp1 through the F-box, and with ubiquitination targets. Therefore, F-box proteins are implicated in cell cycle regulation and signal transduction. We characterized the FBXO45 gene, a recently identified F-box protein, as an estrogen-induced gene. By using bioinformatics, human and mouse FBXO45 (286 aa) showed 100% total-amino-acid identity. Human and mouse FBXO45 genes consisting of 3 exons, and the vicinity of the transcriptional start site had several estrogen receptor binding consensus sequences. Finally, human FBXO45 mRNA was rapidly elevated by 17β-estradiol in MCF-7 cells.