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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Oxidative stress/damage induces multimerization and interaction of Fanconi anemia proteins.

Fanconi anemia (FANC) is a heterogeneous genetic disorder characterized by a hypersensitivity to DNA-damaging agents, chromosomal instability, and defective DNA repair. Eight FANC genes have been identified so far, and five of them (FANCA, -C, -E, -F, and -G) assemble in a multinuclear complex and function at least in part in a complex to activate FANCD2 by monoubiquitination. Here we show that FANCA and FANCG are redox-sensitive proteins that are multimerized and/or form a nuclear complex in response to oxidative stress/damage. Both FANCA and FANCG proteins exist as monomers under non-oxidizing conditions, whereas they become multimers following H2O2 treatment. Treatment of cells with oxidizing agent not only triggers the multimeric complex of FANCA and FANCG in vivo but also induces the interaction between FANCA and FANCG. N-Ethylmaleimide treatment abolishes multimerization and interaction of FANCA and FANCG in vitro. Taken together, our results lead us to conclude that FANCA and FANCG uniquely respond to oxidative damage by forming complex(es) via intermolecular disulfide linkage(s), which may be crucial in forming such complexes and in determining their function.[1]


  1. Oxidative stress/damage induces multimerization and interaction of Fanconi anemia proteins. Park, S.J., Ciccone, S.L., Beck, B.D., Hwang, B., Freie, B., Clapp, D.W., Lee, S.H. J. Biol. Chem. (2004) [Pubmed]
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