Positional cloning of ZNF217 and NABC1: genes amplified at 20q13.2 and overexpressed in breast carcinoma.
We report here the molecular cloning of an approximately 1-Mb region of recurrent amplification at 20q13.2 in breast cancer and other tumors and the delineation of a 260-kb common region of amplification. Analysis of the 1-Mb region produced evidence for five genes, ZNF217, ZNF218, and NABC1, PIC1L (PIC1-like), CYP24, and a pseudogene CRP (Cyclophillin Related Pseudogene). ZNF217 and NABC1 emerged as strong candidate oncogenes and were characterized in detail. NABC1 is predicted to encode a 585-aa protein of unknown function and is overexpressed in most but not all breast cancer cell lines in which it was amplified. ZNF217 is centrally located in the 260-kb common region of amplification, transcribed in multiple normal tissues, and overexpressed in all cell lines and tumors in which it is amplified and in two in which it is not. ZNF217 is predicted to encode alternately spliced, Kruppel-like transcription factors of 1,062 and 1,108 aa, each having a DNA-binding domain (eight C2H2 zinc fingers) and a proline-rich transcription activation domain.
Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
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Collins
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Kowbel
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Godfrey
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Tanner
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Hwang
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Polikoff
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Nonet
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Cochran
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Myambo
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Froula
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Cloutier
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Kuo
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Yaswen
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Hutchinson
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Ericsson
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Pinkel
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Albertson
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Gray
D000595:Amino Acid Sequence; D001483:Base Sequence; D001943:Breast Neoplasms / Q000235:genetics*; D002460:Cell Line; D018244:Chromosomes, Artificial, Yeast; D002890:Chromosomes, Human, Pair 20; D003001:Cloning, Molecular; D017931:DNA Primers; D005091:Exons; D005784:Gene Amplification; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007438:Introns; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins / Q000737:chemistry / Q000235:genetics*; D015534:Trans-Activators / Q000737:chemistry / Q000235:genetics*; D014158:Transcription, Genetic; D014407:Tumor Cells, Cultured; D016335:Zinc Fingers / Q000235:genetics
C113699:BCAS1 protein, human; D017931:DNA Primers; D009363:Neoplasm Proteins; D015534:Trans-Activators; C113698:ZNF217 protein, human