OR5A1

Olfactory receptor 5A1 is a protein that in humans is encoded by the OR5A1 gene.[4]

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]
RNA expression pattern 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 • cell 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	n/a
UniProt	Q8NGJ0	Q8VFV2
RefSeq (mRNA)	NM_001004728	NM_146682
RefSeq (protein)	NP_001004728	NP_666893
Location (UCSC)	Chr 11: 59.44 – 59.45 Mb	n/a
PubMed search	[2]	[3]
Wikidata
View/Edit Human View/Edit Mouse

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.[4]

Genetic differences

A single-nucleotide polymorphism in the OR5A1 receptor (rs6591536[5]) 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.[6]

See also

• Olfactory receptor

References

1. GRCh38: Ensembl release 89: ENSG00000172320 - Ensembl, May 2017
2. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
3. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
4. "Entrez Gene: OR5A1 olfactory receptor, family 5, subfamily A, member 1".
5. "rs6591536". SNPedia.
6. Jaeger SR, McRae JF, Bava CM, Beresford MK, Hunter D, Jia Y, Chheang SL, Jin D, Peng M, Gamble JC, Atkinson KR, Axten LG, Paisley AG, Tooman L, Pineau B, Rouse SA, Newcomb RD (2013). "A Mendelian Trait for Olfactory Sensitivity Affects Odor Experience and Food Selection". Current Biology. 23 (16): 1601–1605. doi:10.1016/j.cub.2013.07.030. PMID 23910657.

Further reading

• Fuchs T, Malecova B, Linhart C, et al. (2003). "DEFOG: a practical scheme for deciphering families of genes". Genomics. 80 (3): 295–302. doi:10.1006/geno.2002.6830. PMID 12213199.
• Malnic B, Godfrey PA, Buck LB (2004). "The human olfactory receptor gene family". Proc. Natl. Acad. Sci. U.S.A. 101 (8): 2584–9. doi:10.1073/pnas.0307882100. PMC 356993. PMID 14983052.

External links

• OR5A1+protein,+human at the US 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.