Description
SETMAR or SET domain and mariner transposase fusion gene is a nonhomologous end-joining repair protein that regulates genomic integration of exogenous DNA by opening chromatin and facilitating joining of DNA ends. SETMAR has histone methyltransferase activity and methylates Lys-4 and Lys-36 of histone H3. SETMAR also has DNA nicking activity and may play a role in DNA repair. Human Pso4 forms a stable complex with SETMAR that regulates Metnase function in DNA repair. SETMAR has sequence-specific DNA-binding activity and recognizes the 19-mer core of the 5-terminal inverted repeats (TIRs) of the Hsmar1 element