Reviewed, UniProtKB/Swiss-Prot Q9W5G6 (OR1A_DROME)

Names and origin

Protein names

Recommended name:
    Putative odorant receptor 1a

Gene names

Name:	Or1a
ORF Names:	CG17885

Organism

Drosophila melanogaster (Fruit fly) [Complete proteome]

Taxonomic identifier

7227 [NCBI]

Taxonomic lineage

Eukaryota › Metazoa › Arthropoda › Hexapoda › Insecta › Pterygota › Neoptera › Endopterygota › Diptera › Brachycera › Muscomorpha › Ephydroidea › Drosophilidae › Drosophila › Sophophora

Protein attributes

Sequence length	392 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at transcript level.

General annotation (Comments)

Function	Complexes with Or83b to form odorant-sensing units, providing sensitive and prolonged odorant signaling and calcium permeability. They are necessary and sufficient to promote functional reconstitution of odor-evoked signaling in sensory neurons that normally respond only to carbon dioxide By similarity.
Subunit structure	Interacts with Or83b. Complexes exist early in the endomembrane system in olfactory sensory neurons (OSNs), coupling these complexes to the conserved ciliary trafficking pathway By similarity.
Subcellular location	Cell membrane; Multi-pass membrane protein By similarity.
Miscellaneous	The atypical heteromeric and topological design of the odorant receptors appears to be an insect-specific solution for odor recognition, making the OR/Or83b complex an attractive target for the development of highly selective insect repellents to disrupt olfactory-mediated host-seeking behaviors of insect disease vectors. Odor-evoked OR currents are independent of known G-protein-coupled second messenger pathways.
Sequence similarities	Belongs to the odorant-gated ionic channel family.

Ontologies

Keywords
Biological process	Olfaction Sensory transduction
Cellular component	Cell membrane Membrane
Domain	Transmembrane
Molecular function	G-protein coupled receptor Receptor Transducer
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	G-protein coupled receptor protein signaling pathway Non-traceable author statement. Source: UniProtKB olfactory behavior Inferred from mutant phenotype. Source: FlyBase sensory perception of smell Non-traceable author statement. Source: UniProtKB
Cellular component	integral to membrane Non-traceable author statement. Source: UniProtKB plasma membrane Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	odorant binding Inferred from electronic annotation. Source: InterPro olfactory receptor activity Non-traceable author statement. Source: UniProtKB
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 392	392	Putative odorant receptor 1a		PRO_0000174224
Regions
	Topological domain	1 – 39	39	Cytoplasmic Potential
	Transmembrane	40 – 60	21	1 Potential
	Topological domain	61 – 75	15	Extracellular Potential
	Transmembrane	76 – 92	17	2 Potential
	Topological domain	93 – 125	33	Cytoplasmic Potential
	Transmembrane	126 – 146	21	3 Potential
	Topological domain	147 – 177	31	Extracellular Potential
	Transmembrane	178 – 198	21	4 Potential
	Topological domain	199 – 256	58	Cytoplasmic Potential
	Transmembrane	257 – 277	21	5 Potential
	Topological domain	278 – 287	10	Extracellular Potential
	Transmembrane	288 – 308	21	6 Potential
	Topological domain	309 – 359	51	Cytoplasmic Potential
	Transmembrane	360 – 380	21	7 Potential
	Topological domain	381 – 392	12	Extracellular Potential

Sequences

	Sequence		Length	Mass (Da)
	Q9W5G6-1 [UniParc]. Last modified June 1, 2001. Version 2. Checksum: 98DADF7B62E0E7DC	FASTA	392	44,960
	10 20 30 40 50 60 MSKLIEVFLG NLWTQRFTFA RMGLDLQPDK KGNVLRSPLL YCIMCLTTSF ELCTVCAFMV 70 80 90 100 110 120 QNRNQIVLCS EALMHGLQMV SSLLKMAIFL AKSHDLVDLI QQIQSPFTEE DLVGTEWRSQ 130 140 150 160 170 180 NQRGQLMAAI YFMMCAGTSV SFLLMPVALT MLKYHSTGEF APVSSFRVLL PYDVTQPHVY 190 200 210 220 230 240 AMDCCLMVFV LSFFCCSTTG VDTLYGWCAL GVSLQYRRLG QQLKRIPSCF NPSRSDFGLS 250 260 270 280 290 300 GIFVEHARLL KIVQHFNYSF MEIAFVEVVI ICGLYCSVIC QYIMPHTNQN FAFLGFFSLV 310 320 330 340 350 360 VTTQLCIYLF GAEQVRLEAE RFSRLLYEVI PWQNLPPKHR KLFLFPIERA QRETVLGAYF 370 380 390 FELGRPLLVW IFRTAGSFTT LMNALYAKYE TH

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"The genome sequence of Drosophila melanogaster." Adams M.D., Celniker S.E., Holt R.A., Evans C.A., Gocayne J.D., Amanatides P.G., Scherer S.E., Li P.W., Hoskins R.A., Galle R.F., George R.A., Lewis S.E., Richards S., Ashburner M., Henderson S.N., Sutton G.G., Wortman J.R., Yandell M.D. , Zhang Q., Chen L.X., Brandon R.C., Rogers Y.-H.C., Blazej R.G., Champe M., Pfeiffer B.D., Wan K.H., Doyle C., Baxter E.G., Helt G., Nelson C.R., Miklos G.L.G., Abril J.F., Agbayani A., An H.-J., Andrews-Pfannkoch C., Baldwin D., Ballew R.M., Basu A., Baxendale J., Bayraktaroglu L., Beasley E.M., Beeson K.Y., Benos P.V., Berman B.P., Bhandari D., Bolshakov S., Borkova D., Botchan M.R., Bouck J., Brokstein P., Brottier P., Burtis K.C., Busam D.A., Butler H., Cadieu E., Center A., Chandra I., Cherry J.M., Cawley S., Dahlke C., Davenport L.B., Davies P., de Pablos B., Delcher A., Deng Z., Mays A.D., Dew I., Dietz S.M., Dodson K., Doup L.E., Downes M., Dugan-Rocha S., Dunkov B.C., Dunn P., Durbin K.J., Evangelista C.C., Ferraz C., Ferriera S., Fleischmann W., Fosler C., Gabrielian A.E., Garg N.S., Gelbart W.M., Glasser K., Glodek A., Gong F., Gorrell J.H., Gu Z., Guan P., Harris M., Harris N.L., Harvey D.A., Heiman T.J., Hernandez J.R., Houck J., Hostin D., Houston K.A., Howland T.J., Wei M.-H., Ibegwam C., Jalali M., Kalush F., Karpen G.H., Ke Z., Kennison J.A., Ketchum K.A., Kimmel B.E., Kodira C.D., Kraft C.L., Kravitz S., Kulp D., Lai Z., Lasko P., Lei Y., Levitsky A.A., Li J.H., Li Z., Liang Y., Lin X., Liu X., Mattei B., McIntosh T.C., McLeod M.P., McPherson D., Merkulov G., Milshina N.V., Mobarry C., Morris J., Moshrefi A., Mount S.M., Moy M., Murphy B., Murphy L., Muzny D.M., Nelson D.L., Nelson D.R., Nelson K.A., Nixon K., Nusskern D.R., Pacleb J.M., Palazzolo M., Pittman G.S., Pan S., Pollard J., Puri V., Reese M.G., Reinert K., Remington K., Saunders R.D.C., Scheeler F., Shen H., Shue B.C., Siden-Kiamos I., Simpson M., Skupski M.P., Smith T.J., Spier E., Spradling A.C., Stapleton M., Strong R., Sun E., Svirskas R., Tector C., Turner R., Venter E., Wang A.H., Wang X., Wang Z.-Y., Wassarman D.A., Weinstock G.M., Weissenbach J., Williams S.M., Woodage T., Worley K.C., Wu D., Yang S., Yao Q.A., Ye J., Yeh R.-F., Zaveri J.S., Zhan M., Zhang G., Zhao Q., Zheng L., Zheng X.H., Zhong F.N., Zhong W., Zhou X., Zhu S.C., Zhu X., Smith H.O., Gibbs R.A., Myers E.W., Rubin G.M., Venter J.C. Science 287:2185-2195(2000) [PubMed: 10731132] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: Berkeley.
[2]	"Annotation of the Drosophila melanogaster euchromatic genome: a systematic review." Misra S., Crosby M.A., Mungall C.J., Matthews B.B., Campbell K.S., Hradecky P., Huang Y., Kaminker J.S., Millburn G.H., Prochnik S.E., Smith C.D., Tupy J.L., Whitfield E.J., Bayraktaroglu L., Berman B.P., Bettencourt B.R., Celniker S.E., de Grey A.D.N.J. , Drysdale R.A., Harris N.L., Richter J., Russo S., Schroeder A.J., Shu S.Q., Stapleton M., Yamada C., Ashburner M., Gelbart W.M., Rubin G.M., Lewis S.E. Genome Biol. 3:RESEARCH0083.1-RESEARCH0083.22(2002) [PubMed: 12537572] [Abstract] Cited for: GENOME REANNOTATION.
+	Additional computationally mapped references.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AE014298 Genomic DNA. Translation: AAF45495.2.
RefSeq	NP_525029.2.
UniGene	Dm.5720
3D structure databases
ModBase	Search...
Genome annotation databases
Ensembl	FBgn0029521. Drosophila melanogaster. [Contig view]
GeneID	30978.
KEGG	dme:Dmel_CG17885.
NMPDR	fig|7227.3.peg.15883.
Organism-specific databases
FlyBase	FBgn0029521. Or1a.
Phylogenomic databases
HOGENOM	Q9W5G6.
OMA	Q9W5G6. VWIFRTA.
Enzyme and pathway databases
BioCyc	DMEL-XXX-02:DMEL-XXX-02-000014-MON.
Gene expression databases
ArrayExpress	Q9W5G6.
GermOnline	CG17885. Drosophila melanogaster.
Family and domain databases
InterPro	IPR004117. 7tm6_olfct_rcpt. [Graphical view]
PANTHER	PTHR21137. 7tm6_olfct_rcpt. 1 hit.
Pfam	PF02949. 7tm_6. 1 hit. [Graphical view]
ProtoNet	Search...
Other Resources
NextBio	771287.

Entry information

Entry name

OR1A_DROME

Accession

Primary (citable) accession number: Q9W5G6

Entry history

Integrated into UniProtKB/Swiss-Prot:	December 1, 2000
Last sequence update:	June 1, 2001
Last modified:	June 16, 2009
This is version 64 of the entry and version 2 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

Drosophila annotation project