Function
STRM-1 is a methyltransferase that catalyzes the transfer of a methyl group from S-adenosyl-methionine to the C-4 position of A-ring sterols, such as lathosterone (5alpha-cholest-7-en-3-one). This methylation reaction renders these sterols unsuitable as precursors for the synthesis of dafachronic acids. Dafachronic acids are hormones that act as ligands for the nuclear hormone receptor (NHR) daf-12, suppressing dauer formation and promoting reproductive growth. By reducing the biosynthesis of dafachronic acids, STRM-1 can effectively regulate dauer larva formation.