ZBTB48 is a multifunctional zinc finger transcription factor that operates at the intersection of telomere maintenance, transcriptional regulation, and RNA metabolism. Structurally, it contains a BTB domain and C2H2-zinc fingers that enable direct binding to telomeric double-stranded TTAGGG repeats 1. Primary to its function, ZBTB48 acts as a negative regulator of telomere length by preferentially binding elongated telomeres with low shelterin complex occupancy and initiating telomere trimming to prevent aberrant lengthening 1. Beyond telomeric roles, ZBTB48 functions as a transcriptional activator binding promoter regions of select genes, notably MTFP1, which regulates mitochondrial fission 12. ZBTB48 also directly activates the B-cell-specific CIITA promoter, priming MHC class II gene expression through chr1 remodeling 3. Recently identified is its role in epitranscriptomic regulation: ZBTB48 recruits the m6A/m6Am demethylase FTO to target mRNAs, controlling substrate selectivity and modulating RNA decay rates 4. Additionally, ZBTB48 negatively regulates cell proliferation by activating ARF, a tumor suppressor isoform of CDKN2A. Clinically, ZBTB48 expression shows complex associations with cancer prognosis, with elevated expression correlating with poorer outcomes in hepatocellular and cervical carcinomas 56, suggesting roles in cancer progression.