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Gene. 2003 Jan 2;302(1-2):139-46.

Genomic structure of the human BCCIP gene and its expression in cancer.

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  • 1Department of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, 915 Camino de Salud, NE, Albuquerque, NM 87131, USA.


Human BCCIPalpha (Tok-1alpha) is a BRCA2 and CDKN1A (Cip1, p21) interacting protein. Our previous studies have showed that overexpression of BCCIPalpha inhibits the growth of certain tumor cells [Oncogene 20 (2001) 336]. In this study, we report the genomic structure of the human BCCIP gene, which contains nine exons. Alternative splicing of the 3'-terminal exons produces two isoforms of BCCIP transcripts, BCCIPalpha and BCCIPbeta. The BCCIP gene is flanked by two genes that are transcribed in the opposite orientation of the BCCIP gene. It lies head-to-head and shares a bi-directional promoter with the uroporphyrinogen III synthase (UROS) gene. The last three exons of BCCIP gene overlap the 3'-terminal seven exons of a DEAD/H helicase-like gene (DDX32). Using a matched normal/tumor cDNA array, we identified a reduced expression of BCCIP in kidney tumor, suggesting a role of BCCIP in cancer etiology.

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