Cpg Dinucleotides
Cpg Dinucleotides - Related Videos
13:21
Comprehensive DNA Methylation Analysis Using a Methyl-CpG-binding Domain Capture-based Method in Chronic Lymphocytic Leukemia Patients
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Cited by 2 •
2017
This work describes an optimized methyl-CpG-binding domain (MBD) sequencing protocol and a computational pipeline to identify differentially methylated CpG-rich regions in chronic lymphocytic leukemia (CLL) patients.
05:58
A Novel Nicotinamide Adenine Dinucleotide Correction Method for Intracellular Ca2+ Measurement with Fura-2-Analog in Live Cells
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2019
Due to the spectral overlapping of the excitation and emission wavelengths of NADH and fura-2 analogs, the signal interference from both chemicals in live cells is unavoidable during quantitative measurement of [Ca2+]. Thus, a novel online correction method of NADH signal interference to measure [Ca2+] was developed.
12:34
DNA Methylation: Bisulphite Modification and Analysis
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Cited by 75 •
2011
The gold standard for DNA methylation analysis is genomic sequencing of bisulphite converted DNA. This method takes advantage of the increased sensitivity of cytosine compared with 5-methylcytosine (5-MeC) to bisulphite deamination under acidic conditions. Unmethylated cytosines can be distinguished from methylated cytosines after PCR amplification of the target genomic DNA.
08:38
Targeted DNA Methylation Analysis by Next-generation Sequencing
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Cited by 83 •
2015
Bisulfite amplicon sequencing (BSAS) is a method for quantifying cytosine methylation in targeted genomic regions of interest. This method uses bisulfite conversion paired with PCR amplification of target regions prior to next-generation sequencing to produce absolute quantitation of DNA methylation at a base-specific level.
10:21
An Overview of Epigenetics
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2023
Since the early days of genetics research, scientists have noted certain heritable phenotypic differences that are not due to differences in the nucleotide sequence of DNA. Current evidence suggests that these “epigenetic” phenomena might be controlled by a number of mechanisms, including the modification of DNA cytosine bases with methyl groups, the addition of various chemical groups to histone proteins, and the recruitment of protein factors to specific DNA sites via interactions with...
FAQs
DNA methyltransferases add a methyl group to the cytosine within a CpG site, forming 5-methylcytosine. When methylation accumulates in CpG-rich promoter regions, transcription is often reduced. This relationship makes methylation patterns useful for examining how cells regulate gene activity and how altered regulation may contribute to changes in cellular function.
CpG-rich promoter regions are important because their methylation state is closely associated with transcriptional activity. Comparing methylated and less methylated regions can reveal regulatory differences without changing the underlying DNA sequence. This provides a way to investigate epigenetic control, in which heritable or stable changes in gene regulation help distinguish cellular states.
Abnormal methylation can indicate that gene regulation has been disrupted. Because CpG methylation may reduce transcription in promoter regions, unusual patterns can point to changes in the activity of genes involved in cellular identity or development. Researchers therefore examine these patterns as markers of altered genome function rather than treating methylation as a simple sequence change.
Researchers consider both where CpG sites occur and whether they are methylated. Their distribution identifies genomic regions that may have regulatory importance, while methylation state provides information about gene-control activity. Comparing these features across cells or biological conditions can help characterize cellular identity, differentiation-related regulation, and disease-associated changes.
CpG methylation patterns provide markers for following regulatory states as cells acquire specialized identities. When patterns persist through biological contexts, they can support studies of epigenetic inheritance, while differences between cell types can illuminate differentiation. This approach focuses on transmitted or maintained gene-regulatory information rather than alterations to the DNA sequence itself.
CpG methylation patterns help researchers examine genomic imprinting, a context in which gene regulation is linked to parental origin, and they also provide markers for disease-associated changes. Studies of cancer and developmental disorders can compare methylation states to identify altered regulatory patterns, connecting CpG behavior with abnormal gene control and cellular function.