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General Information
Symbol
Dmel\Ir8a
Species
D. melanogaster
Name
Ionotropic receptor 8a
Annotation Symbol
CG32704
Feature Type
FlyBase ID
FBgn0052704
Gene Model Status
Stock Availability
Gene Snapshot
Ionotropic receptor 8a (Ir8a) encodes a member of the Ionotropic Receptor (IR) family of variant ionotropic glutamate receptors. It functions as a co-receptor together with ligand-specific IRs (in a probable heterotetrameric complex) to detect diverse organic acids. [Date last reviewed: 2019-03-07]
Key Links
Genomic Location
Cytogenetic map
Sequence location
X:9,232,726..9,236,585 [-]
Recombination map
1-27
Sequence
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
GO Summary Ribbons
Protein Family (UniProt)
-
Summaries
Gene Group (FlyBase)
ANTENNAL IONOTROPIC CO-RECEPTORS -
Ionotropic Receptors (IR) co-receptors are part of the IR family. They are broadly, but selectively, expressed in antennal sensory neurons in Drosophila. Some antenneal IRs only form functional odor-responsive ion channels as a heteromeric complex with an IR co-receptor. (Adapted from FBrf0222310).
Summary (Interactive Fly)
Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the GBrowse view of Dmel\Ir8a or the JBrowse view of Dmel\Ir8a for information on other features

To submit a correction to a gene model please use the Contact FlyBase form

Protein Domains (via Pfam)
Isoform displayed:
Pfam protein domains
InterPro name
classification
start
end
Protein Domains (via SMART)
Isoform displayed:
SMART protein domains
InterPro name
classification
start
end
Comments on Gene Model
Gene model reviewed during 5.52
Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0071333
2811
936
Additional Transcript Data and Comments
Reported size (kB)
Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
RefSeq ID
GenBank
FBpp0071268
106.3
936
5.53
Polypeptides with Identical Sequences

There is only one protein coding transcript and one polypeptide associated with this gene

Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Linkouts
Sequences Consistent with the Gene Model
Nucleotide / Polypeptide Records
 
Mapped Features

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\Ir8a using the Feature Mapper tool.

External Data
Crossreferences
Linkouts
Gene Ontology (28 terms)
Molecular Function (9 terms)
Terms Based on Experimental Evidence (5 terms)
CV Term
Evidence
References
inferred from direct assay
inferred from direct assay
contributes_tocontributes_to olfactory receptor activity
inferred from direct assay
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN001826301
(assigned by GO_Central )
inferred from electronic annotation with InterPro:IPR001320, InterPro:IPR019594
(assigned by InterPro )
Biological Process (11 terms)
Terms Based on Experimental Evidence (8 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR001508
(assigned by InterPro )
inferred from biological aspect of ancestor with PANTHER:PTN001826301
(assigned by GO_Central )
inferred from biological aspect of ancestor with PANTHER:PTN001826301
(assigned by GO_Central )
Cellular Component (8 terms)
Terms Based on Experimental Evidence (5 terms)
CV Term
Evidence
References
inferred from direct assay
inferred from direct assay
inferred from direct assay
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000437926
(assigned by GO_Central )
inferred from biological aspect of ancestor with PANTHER:PTN001826301
(assigned by GO_Central )
inferred from biological aspect of ancestor with PANTHER:PTN001826301
(assigned by GO_Central )
Expression Data
Expression Summary Ribbons
Colored tiles in ribbon indicate that expression data has been curated by FlyBase for that anatomical location. Colorless tiles indicate that there is no curated data for that location.
For complete stage-specific expression data, view the modENCODE Development RNA-Seq section under High-Throughput Expression below.
Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
RT-PCR
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Ir8a transcript is expressed in the neurons of the sensillum coeloconicum of antennal segment 3 located throughout the antenna and around the sacculus.
Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
western blot
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Ir8a protein is expressed in the cell body and dendritic ends of a subset of neurons of sensillum coeloconicum of antennal segment 3 and in the neurons of the grooved sensillum of sacculus, which project to the third chamber of the sacculus. A subset of the sensilla coeloconicum labeled with Ir8a also expresses Ir25a.
Marker for
 
Subcellular Localization
CV Term
Evidence
References
inferred from direct assay
inferred from direct assay
inferred from direct assay
Expression Deduced from Reporters
Reporter: P{Ir8a-GAL4.A}
Stage
Tissue/Position (including subcellular localization)
Reference
Reporter: P{Ir8a-GAL4.Ab}
Stage
Tissue/Position (including subcellular localization)
Reference
Reporter: P{Ir8a-GAL4.M}
Stage
Tissue/Position (including subcellular localization)
Reference
High-Throughput Expression Data
Associated Tools

GBrowse - Visual display of RNA-Seq signals

View Dmel\Ir8a in GBrowse 2
RNA-Seq by Region - Search RNA-Seq expression levels by exon or genomic region
Reference
See Gelbart and Emmert, 2013 for analysis details and data files for all genes.
Developmental Proteome: Life Cycle
Developmental Proteome: Embryogenesis
External Data and Images
Linkouts
FLIGHT - Cell culture data for RNAi and other high-throughput technologies
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, and Transgenic Constructs
Classical and Insertion Alleles ( 2 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 13 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Ir8a
Transgenic constructs containing regulatory region of Ir8a
Deletions and Duplications ( 0 )
Phenotypes
Orthologs
Human Orthologs (via DIOPT v7.1)
Homo sapiens (Human) (14)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
2 of 15
No
Yes
2 of 15
No
Yes
1 of 15
No
No
 
1 of 15
No
No
 
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
 
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
Model Organism Orthologs (via DIOPT v7.1)
Mus musculus (laboratory mouse) (12)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
2 of 15
No
Yes
2 of 15
Yes
Yes
Mmus\Gria1
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
Rattus norvegicus (Norway rat) (10)
1 of 13
Yes
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
Yes
Yes
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
Yes
Xenopus tropicalis (Western clawed frog) (3)
1 of 12
Yes
Yes
1 of 12
Yes
Yes
1 of 12
Yes
No
Danio rerio (Zebrafish) (15)
2 of 15
Yes
No
2 of 15
Yes
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
Yes
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (6)
2 of 15
Yes
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
Arabidopsis thaliana (thale-cress) (20)
4 of 9
Yes
No
4 of 9
Yes
No
4 of 9
Yes
No
4 of 9
Yes
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
3 of 9
No
No
2 of 9
No
No
2 of 9
No
No
Saccharomyces cerevisiae (Brewer's yeast) (0)
No records found.
Schizosaccharomyces pombe (Fission yeast) (0)
No records found.
Orthologs in Drosophila Species (via OrthoDB v9.1) ( EOG0919021G )
Organism
Common Name
Gene
AAA Syntenic Ortholog
Multiple Dmel Genes in this Orthologous Group
Drosophila melanogaster
fruit fly
Drosophila suzukii
Spotted wing Drosophila
Drosophila simulans
Drosophila sechellia
Drosophila erecta
Drosophila yakuba
Drosophila ananassae
Drosophila pseudoobscura pseudoobscura
Drosophila persimilis
Drosophila willistoni
Drosophila virilis
Drosophila mojavensis
Drosophila grimshawi
Orthologs in non-Drosophila Dipterans (via OrthoDB v9.1) ( EOG09150260 )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Musca domestica
House fly
Glossina morsitans
Tsetse fly
Lucilia cuprina
Australian sheep blowfly
Mayetiola destructor
Hessian fly
Mayetiola destructor
Hessian fly
Aedes aegypti
Yellow fever mosquito
Anopheles darlingi
American malaria mosquito
Anopheles gambiae
Malaria mosquito
Culex quinquefasciatus
Southern house mosquito
Orthologs in non-Dipteran Insects (via OrthoDB v9.1) ( EOG090W01YB )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Bombyx mori
Silkmoth
Danaus plexippus
Monarch butterfly
Heliconius melpomene
Postman butterfly
Apis florea
Little honeybee
Apis mellifera
Western honey bee
Bombus impatiens
Common eastern bumble bee
Bombus terrestris
Buff-tailed bumblebee
Linepithema humile
Argentine ant
Megachile rotundata
Alfalfa leafcutting bee
Nasonia vitripennis
Parasitic wasp
Dendroctonus ponderosae
Mountain pine beetle
Tribolium castaneum
Red flour beetle
Pediculus humanus
Human body louse
Rhodnius prolixus
Kissing bug
Cimex lectularius
Bed bug
Acyrthosiphon pisum
Pea aphid
Zootermopsis nevadensis
Nevada dampwood termite
Orthologs in non-Insect Arthropods (via OrthoDB v9.1) ( EOG090X01VZ )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Strigamia maritima
European centipede
Orthologs in non-Arthropod Metazoa (via OrthoDB v9.1) ( None identified )
No non-Arthropod Metazoa orthologies identified
Paralogs
Paralogs (via DIOPT v7.1)
Drosophila melanogaster (Fruit fly) (24)
3 of 10
3 of 10
3 of 10
3 of 10
3 of 10
3 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Model Summary Ribbon
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Interaction
    References
    Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
     
    Disease Associations of Human Orthologs (via DIOPT v7.1 and OMIM)
    Note that ortholog calls supported by only 1 or 2 algorithms (DIOPT score < 3) are not shown.
    Homo sapiens (Human)
    Gene name
    Score
    OMIM
    OMIM Phenotype
    DO term
    Complementation?
    Transgene?
    Functional Complementation Data
    Functional complementation data is computed by FlyBase using a combination of the orthology data obtained from DIOPT and OrthoDB and the allele-level genetic interaction data curated from the literature.
    Interactions
    Summary of Physical Interactions
    esyN Network Diagram
    Show neighbor-neighbor interactions:
    Select Layout:
    Legend:
    Protein
    RNA
    Selected Interactor(s)
    Interactions Browser

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    esyN Network Diagram
    esyN Network Key:
    Suppression
    Enhancement

    Please look at the allele data for full details of the genetic interactions
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Linkouts
    DroID - A comprehensive database of gene and protein interactions.
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Gene Group - Pathway Membership (FlyBase)
    External Data
    Linkouts
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    X
    Recombination map
    1-27
    Cytogenetic map
    Sequence location
    X:9,232,726..9,236,585 [-]
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    8D2-8D2
    Limits computationally determined from genome sequence between P{EP}EP1450&P{EP}EP1356 and P{EP}EP912EP912
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (8)
    Genomic Clones (12)
     

    Please Note FlyBase no longer curates genomic clone accessions so this list may not be complete

    cDNA Clones (1)
     

    Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see GBrowse for alignment of the cDNAs and ESTs to the gene model.

    cDNA clones, fully sequences
    BDGP DGC clones
      Other clones
        Drosophila Genomics Resource Center cDNA clones

        For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.

          cDNA Clones, End Sequenced (ESTs)
          BDGP DGC clones
            Other clones
              RNAi and Array Information
              Linkouts
              DRSC - Results frm RNAi screens
              GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
              Antibody Information
              Laboratory Generated Antibodies
               
              polyclonal
              Commercially Available Antibodies
               
              Other Information
              Relationship to Other Genes
              Source for database identify of
              Source for identity of: Ir8a CG32704
              Source for database merge of
              Source for merge of: CG12122 CG12666
              Additional comments
              Annotations CG12122 and CG12666 merged as CG32704 in release 3 of the genome annotation.
              Other Comments
              v is required for Ir64a protein trafficking and stability.
              Origin and Etymology
              Discoverer
              Etymology
              Identification
              External Crossreferences and Linkouts ( 19 )
              Sequence Crossreferences
              NCBI Gene - Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.
              GenBank Protein - A collection of sequences from several sources, including translations from annotated coding regions in GenBank, RefSeq and TPA, as well as records from SwissProt, PIR, PRF, and PDB.
              RefSeq - A comprehensive, integrated, non-redundant, well-annotated set of reference sequences including genomic, transcript, and protein.
              UniProt/TrEMBL - Automatically annotated and unreviewed records of protein sequence and functional information
              Other crossreferences
              Flygut - An atlas of the Drosophila adult midgut
              GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
              KEGG Genes - Molecular building blocks of life in the genomic space.
              modMine - A data warehouse for the modENCODE project
              Linkouts
              DroID - A comprehensive database of gene and protein interactions.
              DRSC - Results frm RNAi screens
              FLIGHT - Cell culture data for RNAi and other high-throughput technologies
              FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
              FlyMine - An integrated database for Drosophila genomics
              Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
              MIST (protein-protein) - An integrated Molecular Interaction Database
              Synonyms and Secondary IDs (9)
              Datasets (0)
              Study focus (0)
              Experimental Role
              Project
              Project Type
              Title
              References (62)