The ZMYM5 gene encodes Zinc Finger, MYM-Type 5, a protein belonging to the MYM (myeloproliferative and mental retardation motif) family. The protein binds to DNA and functions as a DNA templated, RNA polymerase II transcription factor. Specifically, the protein has been found to bind to the transcription factor ERM and repress the expression of the PS1 reporter gene by attaching to the PS1 promoter region.