Results 211 to 220 of about 64,067 (262)
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Canadian Journal of Biochemistry and Physiology, 1963
The supernatant fraction of liver homogenate brings about the methylation of glycine by S-adenosylmethionine. The secondary amine formed in the reaction appears to be sarcosine. This conclusion is based on (I) the stoichiometry of the reaction, and (II) radioautography of chromatograms of the incubation products. The enzyme, glycine N-methyltransferase,
J, BLUMENSTEIN, G R, WILLIAMS
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The supernatant fraction of liver homogenate brings about the methylation of glycine by S-adenosylmethionine. The secondary amine formed in the reaction appears to be sarcosine. This conclusion is based on (I) the stoichiometry of the reaction, and (II) radioautography of chromatograms of the incubation products. The enzyme, glycine N-methyltransferase,
J, BLUMENSTEIN, G R, WILLIAMS
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Current Opinion in Cell Biology, 1994
Mammals have long been known to tag their DNA by the addition of methyl groups to cytosine residues. Only quite recently, however, has the functional significance of DNA methylation established a firm footing. Evidence now indicates that DNA methylation is essential for development, and is involved in both programmed and ectopic gene inactivation ...
T H, Bestor, G L, Verdine
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Mammals have long been known to tag their DNA by the addition of methyl groups to cytosine residues. Only quite recently, however, has the functional significance of DNA methylation established a firm footing. Evidence now indicates that DNA methylation is essential for development, and is involved in both programmed and ectopic gene inactivation ...
T H, Bestor, G L, Verdine
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Annual Review of Pharmacology and Toxicology, 1999
▪ Abstract Methyl conjugation is an important pathway in the biotransformation of many exogenous and endogenous compounds. Pharmacogenetic studies of methyltransferase enzymes have resulted in the identification and characterization of functionally important common genetic polymorphisms for catechol O-methyltransferase, thiopurine methyltransferase ...
R M, Weinshilboum +2 more
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▪ Abstract Methyl conjugation is an important pathway in the biotransformation of many exogenous and endogenous compounds. Pharmacogenetic studies of methyltransferase enzymes have resulted in the identification and characterization of functionally important common genetic polymorphisms for catechol O-methyltransferase, thiopurine methyltransferase ...
R M, Weinshilboum +2 more
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Methyltransferase DNMT3B in leukemia
Leukemia & Lymphoma, 2019DNA methyltransferases (DNMTs) are highly conserved DNA-modifying enzymes that play important roles in epigenetic regulation and they are involved in cell proliferation, differentiation, and apoptosis. In mammalian cells, three active DNMTs have been identified: DNMT1 acts as a maintenance methyltransferase to replicate preexisting methylation patterns,
Haibin, Zhang +2 more
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EUKARYOTIC CYTOSINE METHYLTRANSFERASES
Annual Review of Biochemistry, 2005▪ Abstract Large-genome eukaryotes use heritable cytosine methylation to silence promoters, especially those associated with transposons and imprinted genes. Cytosine methylation does not reinforce or replace ancestral gene regulation pathways but instead endows methylated genomes with the ability to repress specific promoters in a manner that is ...
Mary Grace, Goll, Timothy H, Bestor
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Biochimica et Biophysica Acta (BBA) - Enzymology, 1968
An enzyme that transfers the methyl group of S-adenosylmethionine to phenol to form anisole is described. The enzyme is highly localized in the microsomes of the liver and lung of mammals and is also present in other tissues. A variety of simple alkyl-, methoxy- and halophenols can serve as substrates for the phenol-O-methylating enzyme.
J, Axelrod, J, Daly
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An enzyme that transfers the methyl group of S-adenosylmethionine to phenol to form anisole is described. The enzyme is highly localized in the microsomes of the liver and lung of mammals and is also present in other tissues. A variety of simple alkyl-, methoxy- and halophenols can serve as substrates for the phenol-O-methylating enzyme.
J, Axelrod, J, Daly
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The phospholipid methyltransferases in yeast
Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1997In fungal microorganisms including fission yeast, Schizosaccharomyces pombe and baker's yeast, Saccharomyces cerevisiae, two enzymes are required to catalyze the synthesis of phosphatidylcholine (PC) from phosphatidylethanolamine (PE). The genes encoding the class I and class II phospholipid N-methyltransferases (PLMTs) have been cloned from both ...
M I, Kanipes, S A, Henry
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2011
DNA methyltransferases are important enzymes and their inhibition has many potential applications. The investigation of DNA methyltransferases as well as screening for potential inhibitors requires specialized enzyme assays. In this chapter, we describe three DNA methyltransferase assays, each of them based on a different method: (1) An assay using ...
Renata Z, Jurkowska +4 more
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DNA methyltransferases are important enzymes and their inhibition has many potential applications. The investigation of DNA methyltransferases as well as screening for potential inhibitors requires specialized enzyme assays. In this chapter, we describe three DNA methyltransferase assays, each of them based on a different method: (1) An assay using ...
Renata Z, Jurkowska +4 more
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Microassay for DNA methyltransferase
Journal of Biochemical and Biophysical Methods, 1991A microassay for DNA methylase is described which can detect activity in as few as 50 tissue culture cells. The cells are lysed and incubated for 2 h at 37 degrees C with 3 microCi high specific activity [3H]AdoMet and 0.5 microgram poly[d(I-C).d(I-C)] in a volume of 23 microliters.
R L, Adams, A, Rinaldi, C, Seivwright
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Pharmacogenomics: Catechol O-Methyltransferase to Thiopurine S-Methyltransferase
Cellular and Molecular Neurobiology, 20061. Pharmacogenomics is the study of the role of inheritance in variation in the drug response phenotype-a phenotype that can vary from adverse drug reactions at one end of the spectrum to lack of therapeutic efficacy at the other. 2. The thiopurine S-methyltransferase (TPMT) genetic polymorphism represents one of the best characterized and most ...
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