Mitotic recombination in patients with ichthyosis causes reversion of dominant mutations in KRT10.
Mitotic recombination in patients with ichthyosis causes reversion of dominant mutations in KRT10.
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DOI:
10.1126/science.1192280
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发表时间:
2010-10-01
期刊:
影响因子:
--
通讯作者:
Lifton RP
中科院分区:
文献类型:
--
作者:
Choate KA;Lu Y;Zhou J;Choi M;Elias PM;Farhi A;Nelson-Williams C;Crumrine D;Williams ML;Nopper AJ;Bree A;Milstone LM;Lifton RP
Somatic loss of wild-type alleles can produce disease traits such as neoplasia. Conversely, somatic loss of disease-causing mutations can revert phenotypes, however these events are infrequently observed. We demonstrate that ichthyosis with confetti, a severe, sporadic skin disease, is associated with thousands of revertant clones of normal skin that arise from loss of heterozygosity on chromosome 17q via mitotic recombination. This enabled mapping and identification of disease-causing mutations in keratin 10 (KRT10); all result in frameshifts into the same alternative reading frame, producing an arginine-rich C-terminal peptide that redirects keratin 10 from the cytokeratin filament network to the nucleolus. The general rarity of spontaneous reversion and the specific absence of reversion of other dominant mutations in KRT10 implicate the frameshift peptide in the appearance of revertants. These results may have ramifications for reversion of other mutations.
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