– G-protein coupled receptor for 5-hydroxytryptamine (serotonin). Also functions as a receptor for various alkaloids and psychoactive substances. Ligand binding causes a conformation change that triggers signaling via guanine nucleotide-binding proteins (G proteins) and modulates the activity of down-stream effectors, such as adenylate cyclase. Signaling inhibits adenylate cyclase activity. HTR1F Protein, Human, Recombinant (His & SUMO) is expressed in E. coli expression system with N-10xHis-SUMO tag. The predicted molecular weight is 60.2 kDa and the accession number is P30939.