DNA methylation in thermophilic bacteria: N4-methylcytosine, 5-methylcytosine, and N5methyladenine
نویسندگان
چکیده
منابع مشابه
N4-methylcytosine as a minor base in bacterial DNA.
The DNA base composition, including the minor base content, of 26 strains of bacteria was determined. The studied bacteria are sources of widely used restriction endonucleases. Approximately 35% of the bacterial DNAs contained N4-methylcytosine, about 60% contained 5-methylcytosine, and about 90% had N6-methyladenine.
متن کاملM.Smal is an N4-methylcytosine specific DNA-methylase.
An enzymatic activity rendering DNA immune to the action of the Smal restriction endonuclease in the presence of S-adenosyl-L-methionine has been detected in Serratia marcescens Sb. This methylase, M.Smal, modifies the second cytosine residue of the substrate sequence CCCGGG yielding N4-methylcytosine.
متن کاملOxidative damage to 5-methylcytosine in DNA.
Exposure of pyrimidines of DNA to ionizing radiation under aerobic conditions or oxidizing agents results in attack on the 5,6 double bond of the pyrimidine ring or on the exocyclic 5-methyl group. The primary product of oxidation of the 5,6 double bond of thymine is thymine glycol, while oxidation of the 5-methyl group yields 5-hydroxymethyluracil. Oxidation of the 5,6 double bond of cytosine ...
متن کاملExamination of the specificity of DNA methylation profiling techniques towards 5-methylcytosine and 5-hydroxymethylcytosine
DNA cytosine-5 methylation is a well-studied epigenetic pathway implicated in gene expression control and disease pathogenesis. Different technologies have been developed to examine the distribution of 5-methylcytosine (5mC) in specific sequences of the genome. Recently, substantial amounts of 5-hydroxymethylcytosine (5hmC), most likely derived from enzymatic oxidation of 5mC by TET1, have been...
متن کاملIdentifying 5-methylcytosine and related modifications in DNA genomes.
Intense interest in the biological roles of DNA methylation, particularly in eukaryotes, has produced at least eight different methods for identifying 5-methylcytosine and related modifications in DNA genomes. However, the utility of each method depends not only on its simplicity but on its specificity, resolution, sensitivity and potential artifacts. Since these parameters affect the interpret...
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ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 1985
ISSN: 0305-1048,1362-4962
DOI: 10.1093/nar/13.4.1399