Microtubule-associated protein tau gene promoter (MAPT promoter)

The Microtubule-associated protein tau (MAPT) gene promoter is the primary regulatory DNA sequence that controls the expression of the tau protein, predominantly within the central nervous system. Tau is a critical protein involved in stabilizing neuronal microtubules; however, its pathological aggregation into neurofibrillary tangles is a defining characteristic of Alzheimer's disease and other tauopathies (Gao et al., 2005, Journal of Biological Chemistry). The MAPT promoter is characterized as a TATA-less, GC-rich region containing multiple binding sites for transcription factors like Sp1 and AP-2, which drive its neuronal expression (PubMed ID: 15800010). By targeting this regulatory region, researchers aim to lower the total concentration of tau protein in the brain, thereby reducing the substrate available for toxic aggregation. Emerging therapeutic strategies include the use of engineered zinc finger protein transcription factors (ZFP-TFs) and CRISPR-based interference (CRISPRi) to selectively repress MAPT transcription (Sangamo Therapeutics, 2020). These approaches represent an upstream intervention compared to traditional antibodies or antisense oligonucleotides that target the protein or mRNA directly.

Other names

Tau promoterMAPT regulatory regionTau gene regulatory DNAMAPT 5-prime regulatory sequence

Transcriptional repression via epigenetic modulation or steric hindrance of RNA polymerase binding to reduce tau protein production.