See also
 | This set index page lists chemical compounds articles associated with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. |
Methylcytosine may refer to:
| | This set index page lists chemical compounds articles associated with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. |
Cytosine is one of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine. It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached. The nucleoside of cytosine is cytidine. In Watson-Crick base pairing, it forms three hydrogen bonds with guanine.
Deoxyribonucleic acid is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid (RNA) are nucleic acids. Alongside proteins, lipids and complex carbohydrates (polysaccharides), nucleic acids are one of the four major types of macromolecules that are essential for all known forms of life.
Nucleic acids are the biopolymers, or large biomolecules, essential to all known forms of life. The term nucleic acid is the overall name for DNA and RNA. They are composed of nucleotides, which are the monomers made of three components: a 5-carbon sugar, a phosphate group and a nitrogenous base. If the sugar is a compound ribose, the polymer is RNA ; if the sugar is derived from ribose as deoxyribose, the polymer is DNA.
Nucleobases, also known as nitrogenous bases or often simply bases, are nitrogen-containing biological compounds that form nucleosides, which, in turn, are components of nucleotides, with all of these monomers constituting the basic building blocks of nucleic acids. The ability of nucleobases to form base pairs and to stack one upon another leads directly to long-chain helical structures such as ribonucleic acid (RNA) and deoxyribonucleic acid (DNA).
5-Methylcytosine is a methylated form of the DNA base cytosine (C) that regulates gene transcription and takes several other biological roles. When cytosine is methylated, the DNA maintains the same sequence, but the expression of methylated genes can be altered. 5-Methylcytosine is incorporated in the nucleoside 5-methylcytidine.
Treat Baldwin Johnson (1875-1947) was an American chemist, born at Bethany, Connecticut.
Site-specific DNA-methyltransferase (cytosine-N4-specific) is an enzyme with systematic name S-adenosyl-L-methionine:DNA-cytosine N4-methyltransferase. This enzyme catalyses the following chemical reaction
Bisulfitesequencing (also known as bisulphite sequencing) is the use of bisulfite treatment of DNA before routine sequencing to determine the pattern of methylation. DNA methylation was the first discovered epigenetic mark, and remains the most studied. In animals it predominantly involves the addition of a methyl group to the carbon-5 position of cytosine residues of the dinucleotide CpG, and is implicated in repression of transcriptional activity.
Isoguanine or 2-hydroxyadenine is a purine base that is an isomer of guanine. It is a product of oxidative damage to DNA and has been shown to cause mutation. It is also used in combination with isocytosine in studies of unnatural nucleic acid analogues of the normal base pairs in DNA.
Nucleic acid design is the process of generating a set of nucleic acid base sequences that will associate into a desired conformation. Nucleic acid design is central to the fields of DNA nanotechnology and DNA computing. It is necessary because there are many possible sequences of nucleic acid strands that will fold into a given secondary structure, but many of these sequences will have undesired additional interactions which must be avoided. In addition, there are many tertiary structure considerations which affect the choice of a secondary structure for a given design.
5-Hydroxymethylcytosine (5hmC) is a DNA pyrimidine nitrogen base derived from cytosine. It is potentially important in epigenetics, because the hydroxymethyl group on the cytosine can possibly switch a gene on and off. It was first seen in bacteriophages in 1952. However, in 2009 it was found to be abundant in human and mouse brains, as well as in embryonic stem cells. In mammals, it can be generated by oxidation of 5-methylcytosine, a reaction mediated by TET enzymes. Its molecular formula is C5H7N3O2.
C5H7N3O may refer to:
Sir Shankar Balasubramanian is an Indian-born British chemist and Herchel Smith Professor of Medicinal Chemistry in the Department of Chemistry at the University of Cambridge, Senior Group Leader at the Cancer Research UK Cambridge Institute and Fellow of Trinity College, Cambridge. He is recognised for his contributions in the field of nucleic acids. He is scientific founder of Solexa and Cambridge Epigenetix.
A bridged nucleic acid (BNA) is a modified RNA nucleotide. They are sometimes also referred to as constrained or inaccessible RNA molecules. BNA monomers can contain a five-membered, six-membered or even a seven-membered bridged structure with a "fixed" C3'-endo sugar puckering. The bridge is synthetically incorporated at the 2', 4'-position of the ribose to afford a 2', 4'-BNA monomer. The monomers can be incorporated into oligonucleotide polymeric structures using standard phosphoamidite chemistry. BNAs are structurally rigid oligo-nucleotides with increased binding affinities and stability.
16S rRNA (cytosine1402-N4)-methyltransferase (EC 2.1.1.199, RsmH, MraW) is an enzyme with systematic name S-adenosyl-L-methionine:16S rRNA (cytosine1402-N4)-methyltransferase. This enzyme catalyses the following chemical reaction
Multisite-specific tRNA:(cytosine-C5)-methyltransferase is an enzyme with systematic name S-adenosyl-L-methionine:tRNA (cytosine-C5)-methyltransferase. This enzyme catalyses the following chemical reaction
TRNA (cytosine34-C5)-methyltransferase is an enzyme with systematic name S-adenosyl-L-methionine:tRNA (cytosine34-C5)-methyltransferase. This enzyme catalyses the following chemical reaction
Tuberculinic acid is a noncanonical nucleic acid initially identified as the poison of Tubercle bacillus, the principal causative bacterium of tuberculosis. Its discovery was one of the most important landmarks in understanding tuberculosis and in molecular biology. It is regarded as the most toxic component of the bacillus. It was from this compound that DNA methylation was discovered as it was the first molecule found to contain 5-methylcytosine. In addition it contains thymine, guanine and cytosine.
Marianne Frommer is an Australian geneticist. She was born in Hong Kong and educated at the University of Sydney – BSc(Hons) 1969 and PhD in 1976. She is best known for developing a protocol to map DNA methylation by bisulphite genomic sequencing.
RMBase is designed for decoding the landscape of RNA modifications identified from high-throughput sequencing data. It contains ~124200 N6-Methyladenosines (m6A), ~9500 pseudouridine (Ψ) modifications, ~1000 5-methylcytosine (m5C) modifications, ~1210 2′-O-methylations (2′-O-Me) and ~3130 other types of RNA modifications. RMBase demonstrated thousands of RNA modifications located within mRNAs, regulatory ncRNAs, miRNA target sites and disease-related SNPs.