Fanconi anemia (FA) is an autosomal recessive disorder in humans characterized by bone marrow failure, cancer predisposition, and cellular hypersensitivity to cross-linking agents such as mitomycin C and diepoxybutane. FA genes display a caretaker function essential for maintenance of genomic integrity. We have cloned the murine homolog of FANCA, the gene mutated in the major FA complementation group (FA-A). The full-length mouse Fanca cDNA consists of 4503 bp and encodes a protein with a predicted molecular weight of 161 kDa. The deduced Fanca mouse protein shares 81% amino acid sequence similarity and 66% identity with the human protein. The nuclear localization signal and partial leucine zipper consensus motifs found in the human FANCA protein were also present in the murine homolog. In spite of the species difference, the murine Fanca cDNA was capable of correcting the cross-linker sensitive phenotype of human FA-A cells, suggesting functional conservation. Based on Northern as well as Western blots, Fanca was mainly expressed in lymphoid tissues, testis, and ovary. This expression pattern correlates with some of the clinical symptoms observed in FA patients. The availability of the murine Fanca cDNA now allows the gene to be studied in experimental mouse models.
Mammalian Genome – Springer Journals
Published: Apr 1, 2000
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