OR9K2 is an olfactory receptor protein that functions as an odorant receptor. Based on limited published evidence, OR9K2 exhibits odorant binding and olfactory receptor activity at the plasma membrane, contributing to sensory perception of smell through standard G-protein coupled receptor mechanisms. A rare variant in OR9K2 was identified in individuals with autism spectrum disorder 1, though the authors note further validation is required to establish any association between OR9K2 variants and ASD pathogenesis.