XAB1 Proteins and Enzymes

The DNA methylation system is composed of methyl-CpG-binding proteins, as well as of DNA cytosine methyl transferases. Five methyl-CpG binding proteins were isolated: MeCP2, MBD1, MBD2, MBD3 and MBD4. MBD2 consists of two isoforms, MBD2a and MBD2b, which are generated from a single gene. MBD2a is a component of MeCP1, a large corepressor complex that represses transcription from densely methylated genes. Components of MeCP1 include MBD2, Mi-2, MTA2, MBD3 and HDAC1/2. MIZF and MBDin were ...