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Ir100a Ionotropic receptor 100a [ Drosophila melanogaster (fruit fly) ]

Gene ID: 43753, updated on 6-Jul-2026
Official Symbol
Ir100aprovided by FlyBase
Official Full Name
Ionotropic receptor 100aprovided by FlyBase
Primary source
FLYBASE:FBgn0039879
Locus tag
Dmel_CG11575
See related
AllianceGenome:FB:FBgn0039879
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Drosophila melanogaster
Lineage
Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Hexapoda; Insecta; Pterygota; Neoptera; Endopterygota; Diptera; Brachycera; Muscomorpha; Ephydroidea; Drosophilidae; Drosophila; Sophophora
Also known as
100a; CG11575; DmelIR100a; Dmel\CG11575; IR100a
Summary
Predicted to enable ligand-gated monoatomic ion channel activity. Involved in sensory perception of taste. Predicted to be located in membrane. Is expressed in dorsal cibarial sense organ neurons; labral sense organ neurons; larval gustatory receptor neuron of the dorsal pharyngeal sense organ; larval gustatory receptor neuron of the posterior pharyngeal sense organ; and posterior pharyngeal sense organ. [provided by Alliance of Genome Resources, Jul 2025]
Orthologs
Try the new Gene page
Try the new Transcripts and proteins table
See Ir100a in Genome Data Viewer
Location:
100D2-100D2; 3-102 cM
Exon count:
1
Annotation release Status Assembly Chr Location
Release 6.54 current Release 6 plus ISO1 MT (GCF_000001215.4) 3R NT_033777.3 (31800963..31802774)
Release 5.57 previous assembly Release 5 (GCF_000001215.2) 3R NT_033777.2 (27626685..27628496)

Chromosome 3R - NT_033777.3Genomic Context describing neighboring genes Neighboring gene fat facets Neighboring gene Methylcrotonoyl-CoA carboxylase 1 Neighboring gene ATP-dependent chromatin assembly factor large subunit Neighboring gene uncharacterized protein Neighboring gene uncharacterized protein Neighboring gene Riboflavin transporter

Gene Ontology Provided by FlyBase

Function Evidence Code Pubs
enables ligand-gated monoatomic ion channel activity ISM
Inferred from Sequence Model
more info
PubMed 
Process Evidence Code Pubs
involved_in detection of chemical stimulus ISS
Inferred from Sequence or Structural Similarity
more info
PubMed 
involved_in detection of chemical stimulus involved in sensory perception IEA
Inferred from Electronic Annotation
more info
 
involved_in monoatomic ion transmembrane transport IEA
Inferred from Electronic Annotation
more info
 
involved_in sensory perception of taste IEP
Inferred from Expression Pattern
more info
PubMed 
Component Evidence Code Pubs
located_in membrane ISM
Inferred from Sequence Model
more info
PubMed 
located_in plasma membrane IEA
Inferred from Electronic Annotation
more info
 
Preferred Names
ionotropic receptor 100a
Names
CG11575-PA
Ir100a-PA

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Genome Annotation

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference assembly

Genomic

  1. NT_033777.3 Reference assembly

    Range
    31800963..31802774
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_143641.1NP_651898.2  ionotropic receptor 100a

    See identical proteins and their annotated locations for NP_651898.2

    Status: REVIEWED

    UniProtKB/TrEMBL
    Q9V9T2
    Related
    FBpp0085205, FBtr0085846
    Conserved Domains (2) summary
    pfam00060
    Location:439580
    Lig_chan; Ligand-gated ion channel
    cl21456
    Location:210255
    Periplasmic_Binding_Protein_Type_2; Type 2 periplasmic binding fold superfamily