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

Enhanced CpG mutability and tumorigenesis in MBD4-deficient mice.

The mammalian protein MBD4 contains a methyl-CpG binding domain and can enzymatically remove thymine ( T) or uracil ( U) from a mismatched CpG site in vitro. These properties suggest that MBD4 might function in vivo to minimize the mutability of 5-methylcytosine by removing its deamination product from DNA. We tested this hypothesis by analyzing Mbd4-/- mice and found that the frequency of of C --> T transitions at CpG sites was increased by a factor of three. On a cancer-susceptible Apc(Min/+) background, Mbd4-/- mice showed accelerated tumor formation with CpG --> TpG mutations in the Apc gene. Thus MBD4 suppresses CpG mutability and tumorigenesis in vivo.[1]


  1. Enhanced CpG mutability and tumorigenesis in MBD4-deficient mice. Millar, C.B., Guy, J., Sansom, O.J., Selfridge, J., MacDougall, E., Hendrich, B., Keightley, P.D., Bishop, S.M., Clarke, A.R., Bird, A. Science (2002) [Pubmed]
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