cpg islands การใช้

• This mechanism is important because it dictates the rarity of CpG islands.
• PRC2 is rectruited by many elements, including CpG islands.
• CpG islands also occur frequently in promoters for functional noncoding RNAs such as microRNAs.
• The methylation patterns of the E-cadherin 5 CpG island are not stable.
• Pioneer factors that bind to CpG islands and cysteine residues block access to methyltransferases.
• However, CpG islands appear to be excluded from this as they are normally unmethylated.
• About 70 % of human CpG island.
• Hypomethylation of CpG islands in promoters results in overexpression of the genes or gene sets affected.
• Around 60-70 % of human genes have a CpG island in their promoter region.
• The presence of multiple methylated CpG sites in CpG islands of promoters causes stable silencing of genes.
• DNA repair genes are frequently repressed in cancers due to hypermethylation of CpG islands within their promoters.
• A second underlying commonality in cancers is altered promoter hypermethylation of CpG islands ) than by mutations.
• Chloride channel 4 has an evolutionary conserved CpG island and is conserved in both mouse and hamster.
• Hypomethylation of CpG islands in promoters results in increased transcription of the genes or gene sets affected.
• Genes can be silenced by multiple methylation of CpG sites in the CpG islands of their promoters.
• Reciprocally, around 60-70 % of human genes have a CpG island in their promoter region.
• The majority of CpG islands are constitutively unmethylated and enriched for permissive chromatin modification such as H3K4 methylation.
• Overall, tumor samples with higher levels of CpG island hypermethylation had decreased TCF21 expression than normal controls.
• Genes may also have distant promoters ( distal promoters ) and these frequently contain CpG islands as well.
• On the other hand, hypomethylation of CpG islands in promoters can result in gene over-expression.