R-loop formation is a distinctive characteristic of unmethylated human CpG island promoters

PA Ginno, PL Lott, HC Christensen, I Korf, F Chédin - Molecular cell, 2012 - cell.com
CpG islands (CGIs) function as promoters for approximately 60% of human genes. Most of
these elements remain protected from CpG methylation, a prevalent epigenetic modification …

Protection of CpG islands from DNA methylation is DNA-encoded and evolutionarily conserved

HK Long, HW King, RK Patient, DT Odom… - Nucleic Acids …, 2016 - academic.oup.com
DNA methylation is a repressive epigenetic modification that covers vertebrate genomes.
Regions known as CpG islands (CGIs), which are refractory to DNA methylation, are often …

[HTML][HTML] CpG islands–'a rough guide'

RS Illingworth, AP Bird - FEBS letters, 2009 - Elsevier
Mammalian genomes are punctuated by DNA sequences containing an atypically high
frequency of CpG sites termed CpG islands (CGIs). CGIs generally lack DNA methylation …

DNA methylation of intragenic CpG islands depends on their transcriptional activity during differentiation and disease

DM Jeziorska, RJS Murray… - Proceedings of the …, 2017 - National Acad Sciences
The human genome contains∼ 30,000 CpG islands (CGIs). While CGIs associated with
promoters nearly always remain unmethylated, many of the∼ 9,000 CGIs lying within gene …

GC skew at the 5′ and 3′ ends of human genes links R-loop formation to epigenetic regulation and transcription termination

PA Ginno, YW Lim, PL Lott, I Korf, F Chédin - Genome research, 2013 - genome.cshlp.org
Strand asymmetry in the distribution of guanines and cytosines, measured by GC skew,
predisposes DNA sequences toward R-loop formation upon transcription. Previous work …

CpG islands influence chromatin structure via the CpG-binding protein Cfp1

JP Thomson, PJ Skene, J Selfridge, T Clouaire, J Guy… - Nature, 2010 - nature.com
CpG islands (CGIs) are prominent in the mammalian genome owing to their GC-rich base
composition and high density of CpG dinucleotides,. Most human gene promoters are …

DNA G‐quadruplex stability, position and chromatin accessibility are associated with CpG island methylation

M Jara‐Espejo, SR Line - The FEBS journal, 2020 - Wiley Online Library
CpG islands (CGI) are genomic regions associated with gene promoters and involved in
gene expression regulation. Despite their high CpG content and unlike bulk genomic DNA …

Genome-wide profiling of DNA methylation reveals a class of normally methylated CpG island promoters

L Shen, Y Kondo, Y Guo, J Zhang, L Zhang… - PLoS …, 2007 - journals.plos.org
The role of CpG island methylation in normal development and cell differentiation is of keen
interest, but remains poorly understood. We performed comprehensive DNA methylation …

Sequence determinants, function, and evolution of CpG islands

A Angeloni, O Bogdanovic - Biochemical Society Transactions, 2021 - portlandpress.com
In vertebrates, cytosine-guanine (CpG) dinucleotides are predominantly methylated, with∼
80% of all CpG sites containing 5-methylcytosine (5mC), a repressive mark associated with …

High-throughput engineering of a mammalian genome reveals building principles of methylation states at CG rich regions

AR Krebs, S Dessus-Babus, L Burger, D Schübeler - Elife, 2014 - elifesciences.org
The majority of mammalian promoters are CpG islands; regions of high CG density that
require protection from DNA methylation to be functional. Importantly, how sequence …