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Structure and Hemimethylated CpG Binding of the SRA Domain from Human UHRF1*S⃞

By Chengmin Qian, Side Li, Jean Jakoncic, Lei Zeng, Martin J. Walsh and Ming-Ming Zhou


Human UHRF1 (ubiquitin-like PHD and RING finger 1) functions to maintain CpG DNA methylation patterns through DNA replication by co-localizing with the DNA methyltransferase DNMT1 at chromatin in mammals. Recent studies show that UHRF1 binds selectively to hemimethylated CpG via its conserved SRA (SET- and RING finger-associated) domain. However, the underlying molecular mechanism is not known. Here, we report a 1.95Å resolution crystal structure of the SRA domain of human UHRF1. Using NMR structure-guided mutagenesis, electrophoretic mobility shift assay, and fluorescence anisotropy analysis, we determined key amino acid residues for methyl-DNA binding that are conserved in the SRA domain

Topics: Accelerated Publications
Publisher: American Society for Biochemistry and Molecular Biology
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Provided by: PubMed Central
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