an ubiquitous DNA methyltransferase that methylates CpG residues. Preferentially methylates hemimethylated DNA. It is responsible for maintaining methylation patterns established in development, and may play an active role in DNA damage repair. Mediates transcriptional repression by direct binding to HDAC2. Its abundance is reduced to non detectable levels at the G0 phase of the cell cycle and is dramatically induced upon entrance into the S-phase of the cell cycle. Interacts with HDAC1 and with PCNA. Forms a complex with DMAP1 and HDAC2, with direct interaction. Forms also a stable complex with E2F1, BB1 and HDAC1. Binds MBD2 and MBD3. Three isoforms of the human protein produced by alternative splicing have been described. Note: This description may include information from UniProtKB.
Protein type: Amino Acid Metabolism - cysteine and methionine; Cell development/differentiation; EC 188.8.131.52; Methyltransferase; Methyltransferase, DNA; Transcription regulation
Molecular Function: DNA (cytosine-5-)-methyltransferase activity; DNA binding; DNA-methyltransferase activity; protein binding
Biological Process: DNA methylation; maintenance of DNA methylation; negative regulation of gene expression, epigenetic; negative regulation of histone H3-K9 methylation; positive regulation of histone H3-K4 methylation; Ras protein signal transduction
Alt. Names/Synonyms: AIM; CXXC finger protein 9; CXXC-type zinc finger protein 9; CXXC9; DNA (cytosine-5)-methyltransferase 1; DNA (cytosine-5-)-methyltransferase 1; DNA methyltransferase 1; DNA methyltransferase HsaI; DNA MTase HsaI; DNMT; DNMT1; FLJ16293; M.HsaI; MCMT; MGC104992