Abstract
Fanconi anaemia (FA) is an autosomal-recessive disorder characterized by genomic instability, developmental defects, DNA crosslinking agent hypersensitivity and cancer susceptibility1–3. Somatic-cell hybrid studies have revealed five FA complementation groups (A–E; refs 4–6) displaying similar phenotypes, suggesting that FA genes are functionally related7. The two cloned FA genes, FAA and FAC, encode proteins that are unrelated to each other or to other proteins in GenBank8–10. In the current study, we demonstrate that FAA and FAC bind each other and form a complex. Protein binding correlates with the functional activity of FAA and FAC, as patient-derived mutant FAC (L554P) fails to bind FAA. Although unbound FAA and FAC localize predominantly to the cytoplasm, the FAA–FAC complex is found in similar abundance in both cytoplasm and nucleus. Our results confirm the interrelatedness of the FA genes in a pathway, suggesting the cooperation of FAA and FAC in a nuclear function.
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Kupfer, G., Näf, D., Suliman, A. et al. The Fanconi anaemia proteins, FAA and FAC interact to form a nuclear complex. Nat Genet 17, 487–490 (1997). https://doi.org/10.1038/ng1297-487
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DOI: https://doi.org/10.1038/ng1297-487
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