The function of OR5AN1 (olfactory receptor family 5 subfamily AN member 1, ENSG00000176495) is as follows. Odorant receptor for musk, which specifically recognizes muscone, musk xylol, and musk ketone (PubMed:24361078, PubMed:25901328, PubMed:27098692). Ligand-binding causes a conformation change that triggers signaling via G(s)-class of G alpha protein GNAL, activating adenylyl cyclase (Probable). {ECO:0000269|PubMed:24361078, ECO:0000269|PubMed:25901328, ECO:0000269|PubMed:27098692, ECO:0000305}.