MeCP2 plays a crucial role in regulating gene expression through binding to methylated DNA, which is essential for normal neurological function. Mutations in MeCP2 are linked to Rett syndrome, a severe neurodevelopmental disorder primarily affecting females, highlighting MeCP2′s importance in maintaining cognitive and motor functions. MeCP2 is predominantly located in the nucleus, where MeCP2 interacts with methylated DNA and various corepressor complexes, including mSin3A and histone deacetylases, to mediate transcriptional repression. This nuclear localization enables MeCP2 to effectively regulate gene expression in response to DNA methylation changes, which are critical for neuronal development and plasticity. MeCP2′s ability to bind tightly to methylated regions of the genome underscores MeCP2′s significance in epigenetic regulation and potential impact on various neurological disorders when dysregulated.