DAF-12 nuclear receptor (DAF-12)

DAF-12 is a ligand-activated nuclear receptor in Caenorhabditis elegans and related nematodes that regulates entry into the dauer diapause, developmental timing, and lifespan in response to environmental and hormonal cues[1][3][4][7]. It is structurally and functionally homologous to vertebrate steroid hormone receptors, with both DNA- and ligand-binding domains[4][12]. Activated by endogenous steroidal signals known as dafachronic acids, DAF-12 controls gene networks essential for development, metabolism, aging, and stress responses[1][3][8]. In the presence of dafachronic acid ligands, DAF-12 acts as a transcriptional activator for genes promoting reproductive development; in their absence, it partners with co-repressors (such as DIN-1) to promote dauer formation and stress resistance[3][7][9]. DAF-12 is also studied as a therapeutic target in parasitic nematodes (like Strongyloides and hookworms), since its signaling is required for developmental switches necessary for parasite survival, making it a candidate for antiparasitic drug development[2][6].

Other names

abnormal dauer formation protein 12daf-12DAF12

Ligand-dependent transcriptional regulation (agonist binding—activation of gene expression; absence or antagonist binding—repression); Modulation of developmental and endocrine signaling pathways