Nucleoside Methylation
Nucleoside Methylation - Related Videos
15:22
Nucleoside Triphosphates - From Synthesis to Biochemical Characterization
0 Views •
Cited by 4 •
2014
The protocol described herein aims to explain and abridge the numerous obstacles in the way of the intricate route leading to modified nucleoside triphosphates. Consequently, this protocol facilitates both the synthesis of these activated building-blocks and their availability for practical applications.
06:38
Plant Sample Preparation for Nucleoside/Nucleotide Content Measurement with An HPLC-MS/MS
0 Views •
Cited by 3 •
2021
A precise and reproducible method for in vivo nucleosides/nucleotides quantification in plants is described here. This method employs an HPLC-MS/MS.
08:47
DNA Methylation Analysis
0 Views •
2023
Methylation at CpG dinucleotides is a chemical modification of DNA hypothesized to play important roles in regulating gene expression. In particular, the methylation of clusters of methylation sites, called “CpG islands”, near promoters and other gene regulatory elements may contribute to the stable silencing of genes, for example, during epigenetic processes such as genomic imprinting and X-chromosome inactivation. At the same time, aberrant CpG methylation has been shown to be associated with...
21:24
Methylated DNA Immunoprecipitation
0 Views •
Cited by 43 •
2009
This video demonstrates the protocol for methylated DNA immunoprecipitation (MeDIP). MeDIP is a two day procedure that selectively extracts methylated DNA fragments from a genomic DNA sample using antibodies with specificity for 5 -methylcytosine (anti-5 mC).
02:48
Labeling of Replicating HSV-1 Genomes with a Nucleoside Analog
0 Views •
2026
Source: Dembowski, J. A., Deluca, N. A. Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins. J. Vis. Exp. (2017)This video demonstrates the infection of stationary-phase mammalian cells with HSV-1 (Herpes Simplex Virus-1), followed by replication of the viral genome using host and viral replication machinery. A synthetic nucleoside analog is incorporated into newly synthesized viral DNA to label replicating genomes, which are subsequently isolated for...
FAQs
S-adenosylmethionine serves as the methyl-group donor for many methyltransferase reactions. The enzyme positions this donor near a specific atom on a nucleobase or ribose and transfers the methyl group to that site. This molecular selectivity helps generate defined products, including methylcytidine or methyladenosine, rather than indiscriminately modifying nucleosides.
The location of the added methyl group can alter different structural and recognition properties. Modification of a nucleobase may influence base pairing or molecular recognition, whereas modification involving the ribose can affect RNA folding and interactions. Consequently, methylation site and nucleoside context help determine how a modification influences DNA or RNA behavior.
Methyl groups can modify the structure, stability, and recognition of DNA or RNA while leaving the underlying sequence unchanged. In RNA, these changes may affect folding, molecular interactions, processing, or translation. In this way, nucleoside methylation can regulate how genetic information is handled and interpreted at the molecular level.
Enzymatic methylation uses methyltransferases to direct modification toward particular nucleoside sites, with S-adenosylmethionine commonly supplying the methyl group. Chemical methylation provides an alternative route for adding methyl groups. Comparing these approaches can help researchers investigate modification chemistry, product formation, and the degree to which biological selectivity shapes the resulting nucleoside.
These studies can examine how modified nucleosides contribute to epigenetic regulation, RNA biology, and genome function. Researchers can relate particular modifications to changes in molecular structure, stability, recognition, folding, processing, or translation. Such relationships help connect chemical changes in nucleic-acid building blocks with broader mechanisms of biological regulation.
Changes involving nucleoside methylation can be investigated as part of disease mechanisms because these modifications influence genetic-material structure, recognition, and information processing. The topic also supports development of analytical methods and therapeutic strategies. In biology, this makes methylated nucleosides useful molecular features for studying regulation and exploring possible intervention points.