Methyl-CpG-binding domain protein 1 (MBD1) is a member of a family of mammalian proteins that specifically bind methylated regions of DNA. It is a transcriptional repressor that binds CpG islands in promoters where the DNA is methylated at position 5 of cytosine within CpG dinucleotides. Binding is abolished by the presence of 7-mG that is produced by DNA damage by methylmethanesulfonate (MMS). MBD1 acts as a transcriptional repressor and plays a role in gene silencing by recruiting AFT7IP, which in turn recruits factors such as the histone methyltransferase SETDB1. Isoform 1 and isoform 2 can also repress transcription from unmethylated promoters.
Protein Aliases: CXXC-type zinc finger protein 3; methyl-CpG binding domain protein 1 isoform PCM1; Methyl-CpG-binding domain protein 1; Methyl-CpG-binding protein MBD1; Protein containing methyl-CpG-binding domain 1; the regulator of fibroblast growth factor 2 (FGF-2) transcription
Gene Aliases: CXXC3; MBD1; PCM1; RFT
UniProt ID: (Human) Q9UIS9
Entrez Gene ID: (Human) 4152