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- W4205537037 abstract "Mammals use DNA methylation for the heritable silencing of retrotransposons and imprinted genes and for the inactivation of the X chromosome in females. The establishment of patterns of DNA methylation during gametogenesis depends in part on DNMT3L, an enzymatically inactive regulatory factor that is related in sequence to the DNA methyltransferases DNMT3A and DNMT3B. The main proteins that interact in vivo with the product of an epitope-tagged allele of the endogenous Dnmt3L gene were identified by mass spectrometry as DNMT3A2, DNMT3B and the four core histones. Peptide interaction assays showed that DNMT3L specifically interacts with the extreme amino terminus of histone H3; this interaction was strongly inhibited by methylation at lysine 4 of histone H3 but was insensitive to modifications at other positions. Crystallographic studies of human DNMT3L showed that the protein has a carboxy-terminal methyltransferase-like domain and an N-terminal cysteine-rich domain. Cocrystallization of DNMT3L with the tail of histone H3 revealed that the tail bound to the cysteine-rich domain of DNMT3L, and substitution of key residues in the binding site eliminated the H3 tail-DNMT3L interaction. These data indicate that DNMT3L recognizes histone H3 tails that are unmethylated at lysine 4 and induces de novo DNA methylation by recruitment or activation of DNMT3A2. PMID: 17687327 Funding information This work was supported by: NIGMS NIH HHS, United States Grant ID: R01 GM049245-14 NIGMS NIH HHS, United States Grant ID: R01 GM049245" @default.
- W4205537037 created "2022-01-26" @default.
- W4205537037 creator A5016688487 @default.
- W4205537037 date "2007-08-24" @default.
- W4205537037 modified "2023-10-09" @default.
- W4205537037 title "Faculty Opinions recommendation of DNMT3L connects unmethylated lysine 4 of histone H3 to de novo methylation of DNA." @default.
- W4205537037 doi "https://doi.org/10.3410/f.1090508.543779" @default.
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