A review published in the journal Molecular Biomedicine provides a comprehensive overview of the METTL family, a group of methyltransferase-like proteins crucial for cellular function. METTL family members are widely distributed across the cell nucleus, cytoplasm, and mitochondria. They play a vital role in regulating gene expression by transferring methyl groups to DNA, RNA, and proteins, thereby affecting processes such as DNA replication, transcription, and mRNA translation.