UNC79 subunit of NALCN channel complex (UNC79)

UNC79 is a large cytoplasmic scaffold protein required as an accessory subunit of the NALCN (sodium leak channel, nonselective) channel complex—sometimes called the NALCN channelosome—in excitable tissues such as neurons[2][3][5][7]. It forms a super-helical heterodimer with UNC80, which assembles with NALCN and FAM155A on the cytoplasmic side of the channel. UNC79 is crucial for the assembly, membrane localization, and functional modulation of NALCN, influencing persistent sodium leak currents that establish neuronal resting membrane potential, regulate neuronal excitability, and impact motor and circadian functions. Genetic loss or mutation of UNC79, NALCN, or UNC80 in mice is lethal, and in humans, variants in these genes cause neurodevelopmental channelopathies featuring hypotonia, intellectual disability, and motor impairments[2][3][5][7]. UNC79 supports the channel complex’s structure but is not itself a traditional druggable target; research on its role in disease and potential modulation is ongoing.

Other names

UNC79KIAA1409unc-79 homolog (C. elegans)

Not applicable for UNC79 specifically; for the complex: modulation of NALCN channel function via protein assembly and localization