Metal regulatory transcription factor 1 (MTF1)

Metal regulatory transcription factor 1 (MTF1) is a zinc-dependent transcription factor responsible for sensing intracellular metal ion concentrations and regulating the expression of genes involved in metal homeostasis, including those for metallothioneins and zinc/copper transporters. MTF1 features multiple Cys2His2 zinc finger domains that mediate DNA binding to metal response elements (MREs) in gene promoters, and its activity increases in response to elevated levels of zinc and other heavy metals. MTF1 plays a central role in cellular adaptation to heavy metal stress, oxidative and hypoxic conditions, and is involved in regulation of immune response and metabolic genes, including those encoding insulin in pancreatic β-cells. Dysregulation of MTF1 has been implicated in cancer progression (notably hepatocellular carcinoma), neurodegenerative disease, metabolic syndromes, and inflammatory states. Though not currently a direct therapeutic target, its pathway and transcriptional effects are under investigation for disease-modifying approaches, particularly in metal-related pathologies and cancer[1][2][3][4][5][6].

Other names

Metal regulatory transcription factor 1MTF1MRE-binding transcription factorTranscription factor MTF-1ZRFMetal-responsive transcription factor 1Zinc regulatory factorMRE-binding transcription factor-1

Indirect modulation through changes in metal ion (zinc, copper, cadmium) levels. Activation or repression of metal-responsive gene transcription through MTF1’s zinc finger DNA-binding domain. Interference with MTF1’s interaction with coactivators or microRNA (e.g., miR-148a-3p in cancer cell regulation).