Summary of DNMT3A

This gene encodes an enzyme that is involved in DNA methylation. DNA methylation is needed for determining whether the instructions in a particular segment of DNA are carried out or suppressed, regulating reactions involving proteins and fats, and controlling the processing of chemicals. It is associated with cancer (R).


Required for genome-wide de novo methylation and is essential for the establishment of DNA methylation patterns during development. DNA methylation is coordinated with methylation of histones. It modifies DNA in a non-processive manner and also methylates non-CpG sites. May preferentially methylate DNA linker between 2 nucleosomal cores and is inhibited by histone H1. Plays a role in paternal and maternal imprinting. Required for methylation of most imprinted loci in germ cells. Acts as a transcriptional corepressor for ZBTB18. Recruited to trimethylated 'Lys-36' of histone H3 (H3K36me3) sites. Can actively repress transcription through the recruitment of HDAC activity.

Protein names

Recommended name:


Alternative name(s):

DNA methyltransferase HsaIIIA

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Top Gene-Substance Interactions

DNMT3A Interacts with These Diseases

Substances That Increase DNMT3A

Substances That Decrease DNMT3A

Advanced Summary

Conditions with Increased Gene Activity

Conditions with Decreased Gene Activity