OR5AC2 is a human protein-coding gene that encodes an olfactory receptor belonging to the G‑protein coupled receptor (GPCR) superfamily. Olfactory receptors are responsible for the detection of odorant molecules in the nasal epithelium, initiating neuronal signaling pathways that result in the perception of smell.
Gene and protein characteristics
- Gene family – Member of the olfactory receptor (OR) family, specifically the “family 5, subfamily AC, member 2.”
- Genomic location – Reported in the NCBI Gene database as being situated on chromosome 11 in the human genome (exact cytogenetic band not specified in publicly available summaries).
- Protein structure – Predicted to have the typical seven transmembrane α‑helices characteristic of GPCRs, which span the cell membrane and interact with extracellular odorants.
- Expression – Primarily expressed in the olfactory epithelium of the nasal cavity, consistent with the expression pattern of other olfactory receptors.
- Function – Serves as a molecular receptor for one or more odorant molecules; however, the specific ligands and downstream signaling properties of OR5AC2 have not been experimentally determined. Many olfactory receptors, including OR5AC2, remain “orphan” receptors with unknown functional specificity.
Biological relevance
Olfactory receptors constitute the largest gene family in the human genome and contribute to the broad diversity of odor detection. While the overall role of OR5AC2 aligns with this general function, its individual contribution to odor discrimination and any potential extra‑nasal roles (e.g., in tissue-specific GPCR signaling) have not been documented in peer‑reviewed literature.
References and data sources
- National Center for Biotechnology Information (NCBI) Gene database – entry for OR5AC2 (Gene ID: 151010).
- UniProt Knowledgebase – entry for the protein product of OR5AC2 (accession number varies by isoform).
Note: Detailed functional studies, ligand identification, and phenotypic analyses for OR5AC2 are currently lacking; thus, the information presented reflects the extent of publicly curated genomic and proteomic records.
