» Articles » PMID: 28473536

Impact of Cytosine Methylation on DNA Binding Specificities of Human Transcription Factors

Abstract

The majority of CpG dinucleotides in the human genome are methylated at cytosine bases. However, active gene regulatory elements are generally hypomethylated relative to their flanking regions, and the binding of some transcription factors (TFs) is diminished by methylation of their target sequences. By analysis of 542 human TFs with methylation-sensitive SELEX (systematic evolution of ligands by exponential enrichment), we found that there are also many TFs that prefer CpG-methylated sequences. Most of these are in the extended homeodomain family. Structural analysis showed that homeodomain specificity for methylcytosine depends on direct hydrophobic interactions with the methylcytosine 5-methyl group. This study provides a systematic examination of the effect of an epigenetic DNA modification on human TF binding specificity and reveals that many developmentally important proteins display preference for mCpG-containing sequences.

Citing Articles

Analysis of the Transcriptional Control of in Chicken: IRF1 and GATA1 as Negative Regulators.

Qiu L, Wang H, Li W, Yang T, Bai H, Chang G Animals (Basel). 2025; 15(5).

PMID: 40075948 PMC: 11898421. DOI: 10.3390/ani15050665.


HOXB13 in cancer development: molecular mechanisms and clinical implications.

Zhang J, Li Y, Peng B, Yang X, Chen M, Li Y Front Med. 2025; .

PMID: 40067581 DOI: 10.1007/s11684-024-1119-x.


Exploration of cfDNA landscape in NIPT and clinical utilities of cfDNA based gene expression inference in prenatal diagnostics.

Jia R, Zhu J, Zhang F, Sun Y, Zhang B, Du Y Front Genet. 2025; 16:1527884.

PMID: 40061129 PMC: 11885227. DOI: 10.3389/fgene.2025.1527884.


Epigenetic regulation of TDP-43: potential implications for amyotrophic lateral sclerosis.

Mengistu D, Terribili M, Pellacani C, Ciapponi L, Marzullo M Front Mol Med. 2025; 5:1530719.

PMID: 40017539 PMC: 11865237. DOI: 10.3389/fmmed.2025.1530719.


Epigenetic modifications in bladder cancer: crosstalk between DNA methylation and miRNAs.

Li W, Luo P, Chen Q, Cheng L, Gan L, Zhang F Front Immunol. 2025; 16:1518144.

PMID: 39981244 PMC: 11841399. DOI: 10.3389/fimmu.2025.1518144.


References
1.
Klose R, Sarraf S, Schmiedeberg L, McDermott S, Stancheva I, Bird A . DNA binding selectivity of MeCP2 due to a requirement for A/T sequences adjacent to methyl-CpG. Mol Cell. 2005; 19(5):667-78. DOI: 10.1016/j.molcel.2005.07.021. View

2.
Khund-Sayeed S, He X, Holzberg T, Wang J, Rajagopal D, Upadhyay S . 5-Hydroxymethylcytosine in E-box motifs ACAT|GTG and ACAC|GTG increases DNA-binding of the B-HLH transcription factor TCF4. Integr Biol (Camb). 2016; 8(9):936-45. PMC: 6289052. DOI: 10.1039/c6ib00079g. View

3.
Boyer L, Latek R, Peterson C . The SANT domain: a unique histone-tail-binding module?. Nat Rev Mol Cell Biol. 2004; 5(2):158-63. DOI: 10.1038/nrm1314. View

4.
Rhee H, Pugh B . Comprehensive genome-wide protein-DNA interactions detected at single-nucleotide resolution. Cell. 2011; 147(6):1408-19. PMC: 3243364. DOI: 10.1016/j.cell.2011.11.013. View

5.
Gaston K, Fried M . CpG methylation has differential effects on the binding of YY1 and ETS proteins to the bi-directional promoter of the Surf-1 and Surf-2 genes. Nucleic Acids Res. 1995; 23(6):901-9. PMC: 306783. DOI: 10.1093/nar/23.6.901. View