OR5A1
Identifiers
Aliases	OR5A1, OR11-249, OR5A1P, OST181, olfactory receptor family 5 subfamily A member 1
External IDs	MGI: 2153205 HomoloGene: 17342 GeneCards: OR5A1
Gene location (Human) Chr. Chromosome 11 (human)[1] Band 11q12.1 Start 59,436,469 bp[1] End 59,451,380 bp[1]
Gene location (Mouse) Chr. Chromosome 19 (mouse)[2] Band 19|19 A Start 12,095,360 bp[2] End 12,100,567 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in organ system reproductive system reproductive organ gonad male reproductive system testicle Top expressed in respiratory epithelium peripheral nervous system olfactory epithelium blastocyst More reference expression data BioGPS More reference expression data
Gene ontology Molecular function G protein-coupled receptor activity odorant binding olfactory receptor activity signal transducer activity Cellular component integral component of membrane plasma membrane membrane Biological process sensory perception of smell signal transduction response to stimulus detection of chemical stimulus involved in sensory perception of smell G protein-coupled receptor signaling pathway Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 219982 258677 Ensembl ENSG00000172320 ENSMUSG00000067522 UniProt Q8NGJ0 Q8VFV2 RefSeq (mRNA) NM_001004728 NM_146682 RefSeq (protein) NP_001004728 NP_666893 Location (UCSC) Chr 11: 59.44 – 59.45 Mb Chr 19: 12.1 – 12.1 Mb PubMed search [3] [4]
Wikidata
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Olfactory receptor 5A1 is a protein that in humans is encoded by the OR5A1 gene.^[5]

Olfactory receptors interact with odorant molecules in the nose, to initiate a neuronal response that triggers the perception of a smell. The olfactory receptor proteins are members of a large family of G-protein-coupled receptors (GPCR) arising from single coding-exon genes. Olfactory receptors share a 7-transmembrane domain structure with many neurotransmitter and hormone receptors and are responsible for the recognition and G protein-mediated transduction of odorant signals. The olfactory receptor gene family is the largest in the genome. The nomenclature assigned to the olfactory receptor genes and proteins for this organism is independent of other organisms.^[5]

Genetic differences

A single-nucleotide polymorphism in the OR5A1 receptor (rs6591536^[6]) causes very significant differences in the odor perception of beta-ionone, both in sensitivity and also in subjective quality. Individuals who contain at least one G allele are sensitive to beta-ionone and perceive a pleasant floral scent, while individuals who are homozygous AA are ~100 times less sensitive and at higher concentrations perceive a pungent sour/vinegar odor instead.^[7]

See also

• Olfactory receptor

References

Further reading

External links

• OR5A1+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

This article incorporates text from the United States National Library of Medicine, which is in the public domain.