Sriharsa Pradhan

..Weak interaction of Rb pockets A and B with Dnmt1 was also observed. Overexpression of Rb leads to hypomethylation of the cellular DNA, suggesting that Rb may modulate Dnmt1 activity during DNA replication in the cell cycle...

..These data suggest that UHRF1 may help recruit DNMT1 to hemimethylated DNA to facilitate faithful maintenance of DNA methylation...

..Thus, the CXXC domain encompassing the amino terminus region of DNMT1 cooperates with the catalytic domain for DNA methyltransferase activity...

..There is growing evidence that TET proteins, which convert 5-methylcytosine (5mC) to 5hmC, play important biological roles. To further understand the function of 5hmC, an analysis of the genome-wide localization of this mark is required...

..Thus, complex mammalian epigenetic mechanisms appear to be dynamic yet reversible along with a well-choreographed set of events that take place during mammalian development...

..The PKC family consists of at least 12 isoforms that possess distinct differences in structure, substrate requirement, expression and localization...

..In mammals, DNA methylation participates in gene expression, protection of the genome against selfish DNA, parental imprinting, mammalian X chromosome inactivation, developmental regulation, T cell development, and various diseases...

..Retinoblastoma gene product (Rb), a negative regulator of DNA methylation, bound to the allosteric site of hDNMT1 and inhibited methylation, suggesting Rb may regulate methylation spreading...

..Thus a fine-tuning and balance between cellular SET7/9 and LSD interaction with DNMT1 may be means for epigenetic gene regulation...

..Thus, SUV39H1 utilizes both the chromodomain and the SET domain for catalysis...

..Thus, direct cooperation between DNMT1 and G9a provides a mechanism of coordinated DNA and H3K9 methylation during cell division...

..Thus, apart from transcriptional repression and regulatory roles of lysine methylation, the non-histone protein methylation may create binding sites for cellular protein-protein interactions...

..Thus, Ser-10/Thr-11 phosphorylation impairs Lys-9 methylation. These data suggest that the sequence context of the modified residue affects G9a activity and the modification in the proximal amino acids influences methylation...

..Overexpression of SET7 leads to decreased DNMT1 levels, and siRNA-mediated knockdown of SET7 stabilizes DNMT1. These results demonstrate that signaling through SET7 represents a means of DNMT1 enzyme turnover...

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..These data suggest that the Sp1 transcription factor acts as a platform for recruitment of transcriptional repressors...

..Thus, distinct domains modulate nuclear targeting and catalytic functions of G9a...

..A comparison between cancer and healthy tissue genomes suggested a lower percentage of 5-hmC in cancer, which may reflect the global hypomethylation of 5-mC observed during oncogenesis...

..In vivo co-expression of hDNMT1 and hDNMT3a or hDNMT3b leads to methylation spreading in the genome, suggesting co-operation between de novo and maintenance enzymes during DNA methylation...

..It is unknown whether MBD5 or MBD6 also bind methylated DNA; this question has interest for basic research, but also practical consequences for human health, as MBD5 deletions are the likely cause of certain cases of mental retardation...

..In mammalian cells, phosphorylated DNMT1 is more stable than methylated DNMT1. These results reveal cross-talk on DNMT1, through modifications mediated by AKT1 and SET7, that affects cellular DNMT1 levels...

..Our study offers unique tools for determining more accurate hydroxymethylomes in mammalian cells...

..Finally, using a quantitative PCR approach, we established that a portion of VANGL1 and EGFR gene body methylation in human tissue DNA samples is indeed hydroxymethylation...

..Thus, our results suggest that UHRF1 may serve as a focal point of transcriptional regulation mediated by G9a and other chromatin modification enzymes...

..The MspJI enzyme family, with their different recognition specificities and cleavage properties, provides a basis on which many future methods can build to decode the epigenomes of different organisms...

..Normal human fibroblasts also exhibited similar DNMT1- and p53-mediated methylation of the survivin promoter, suggesting cooperation between p53 and DNMT1 in gene silencing...

..We propose that some amounts of transiently stable 5hmCs may indicate a poised epigenetic state or demethylation intermediate, whereas others may suggest a locally accessible chromosomal environment for the TET enzymatic apparatus...

..Much has been revealed about this interesting DNA modification in recent years, but more research is needed for understanding the role of TET proteins and 5hmC in gene regulation and disease...

..Finally, relevant techniques that may be used in plants in the future are discussed...

..Thus, the general mechanism of p53-mediated gene repression may involve recruitment of other repressive factors...

..Furthermore, these transgenic plants displayed improved resistance to the herbicide N-(phosphonomethyl)glycine (glyphosate) when compared with wild-type N. tabacum...

..These regulatory processes can be disrupted in disease or by environmental factors, resulting in altered DNMT expression and aberrant DNA methylation patterns...

..Additionally, silencing of the Survivin gene coincides with recruitment of G9a and HP1 in DNMT1 wild-type but not null cells. We conclude that direct interactions between HP1 and DNMT1 mediate silencing of euchromatic genes...

..Increase of DNMT1 results in a premature PCNA-DNMT1 complex formation, which facilitates robust maintenance, as well as de novo DNA methylation processes during the G1/S border, which leads to abnormal hypermethylation...

..Our results suggest a model in which H3K9 methylation by KYP, and H3K27 methylation by an unknown enzyme provide a combinatorial histone code for the recruitment of CMT3 to silent loci...

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..These findings implicate Mediator in epigenetic restriction of neuronal gene expression to the nervous system and suggest a pathologic basis for MED12-associated XLMR involving impaired REST-dependent neuronal gene regulation...