نتایج جستجو برای: Carboxylcytosine
تعداد نتایج: 116 فیلتر نتایج به سال:
Abbreviations: PGCs: Primordial Germ Cells; XCI: X Chromosome Inactivation; 5mC: 5-methylcytosine; 5hmC: 5-hydroxymethylcytosine; Xp: Paternal X Chromosome; 5fC: 5-formylcytosine; 5caC: 5-carboxylcytosine; ICM: Inner Cell Mass; PRC2: Polycomb Repressive Complex 2; IAPs: Intracisternal-A-Particles; CGIs: CpG Islands; gDMRs: Germline Differently Methylated Regions; Xi: Inactive X Chromosome; qRT-...
We investigated systematically the effects of Tet-induced oxidation products of 5-methylcytosine on Dnmt1- and DNMT3a-mediated cytosine methylation in synthetic duplex DNA. We found that the replacement of 5-methylcytosine at a CpG site with a 5-hydroxymethylcytosine, 5-formylcytosine, 5-carboxylcytosine or 5-hydroxymethyluracil resulted in altered methylation of cytosine at both the opposite a...
Human thymine DNA glycosylase (hTDG) efficiently excises 5-carboxylcytosine (5caC), a key oxidation product of 5-methylcytosine in genomic DNA, in a recently discovered cytosine demethylation pathway. We present here the crystal structures of the hTDG catalytic domain in complex with duplex DNA containing either 5caC or a fluorinated analog. These structures, together with biochemical and compu...
TDG (thymine DNA glycosylase) is an essential multifunctional enzyme involved in DNA base excision repair, DNA demethylation and transcription regulation. TDG is the predominant enzyme that removes thymine from T/G mispair, which arises due to deamination of 5-methyl-cytosine at the CpG dinucleotide, thereby preventing C to T mutations. SIRT1 is a member of class III NAD+-dependent histone/prot...
The genetic information encoded in genomes must be faithfully replicated and transmitted to daughter cells. The recent discovery of consecutive DNA conversions by TET family proteins of 5-methylcytosine into 5-hydroxymethylcytosine, 5-formylcytosine, and 5-carboxylcytosine (5caC) suggests these modified cytosines act as DNA lesions, which could threaten genome integrity. Here, we have shown tha...
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