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Two overlapping divergent transcription units in the human genome: the FEN1/C11orf10 locus
Noritaka Adachi1, Zarir E Karanjawala, Yasuo Matsuzaki
1Norris Comprehensive Cancer Center, Department of Pathology, University of Southern California Keck School of Medicine, Los Angeles, California 90033, USA.
Abstract:
Flap endonuclease 1 (FEN-1) is a nuclear enzyme involved in DNA metabolism, such as replication, repair, and recombination. Here, we report the comparative genomic organization of the chicken, mouse, and human FEN1 genes as well as the comparative organization of a small gene (C11orf10) located immediately upstream of the FEN1 gene in reverse orientation. Immunostaining revealed that the C11orf10 protein, unlike FEN-1, is located in the cytoplasm, suggesting that these two proteins do not form a physical complex. Importantly, in the human genome, the two mRNAs are overlapping (14 bp) in their 5' ends. Thus, the FEN1/C11orf10 locus is a new example of two overlapping, divergent transcription units in the human genome.
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