FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\nAChRβ2
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General Information
Symbol
Dmel\nAChRβ2
Species
D. melanogaster
Name
nicotinic Acetylcholine Receptor β2
Annotation Symbol
CG6798
Feature Type
FlyBase ID
FBgn0004118
Gene Model Status
Stock Availability
Gene Summary
nicotinic Acetylcholine Receptor β2 (nAChRβ2) encodes a subunit of the nicotinic acetylcholine receptor, which is part of the superfamily of ligand-gated ion channels. These channels open to facilitate the passage of cations across synaptic membranes in response to the binding of their native ligand, acetylcholine. Mutations in nAChRβ2 have been associated with resistance phenotypes to several neonicotinoid insecticides. [Date last reviewed: 2018-09-06] (FlyBase Gene Snapshot)
Also Known As

SBD, Dβ2, nAcRbeta-96A, nAChR, second beta-like subunit of Drosophila

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-85
RefSeq locus
NT_033777 REGION:24509228..24515106
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (17 terms)
Molecular Function (5 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
Biological Process (6 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from expression pattern
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000434994
inferred from biological aspect of ancestor with PANTHER:PTN000434994
inferred from electronic annotation with InterPro:IPR006201
inferred from biological aspect of ancestor with PANTHER:PTN000434994
inferred from biological aspect of ancestor with PANTHER:PTN001054960
Cellular Component (6 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (6 terms)
CV Term
Evidence
References
is_active_in neuron projection
inferred from biological aspect of ancestor with PANTHER:PTN000434994
is_active_in plasma membrane
inferred from biological aspect of ancestor with PANTHER:PTN001054635
inferred from electronic annotation with InterPro:IPR002394
is_active_in synapse
inferred from biological aspect of ancestor with PANTHER:PTN000434994
Protein Family (UniProt)
Belongs to the ligand-gated ion channel (TC 1.A.9) family. Acetylcholine receptor (TC 1.A.9.1) subfamily. (P25162)
Summaries
Gene Snapshot
nicotinic Acetylcholine Receptor β2 (nAChRβ2) encodes a subunit of the nicotinic acetylcholine receptor, which is part of the superfamily of ligand-gated ion channels. These channels open to facilitate the passage of cations across synaptic membranes in response to the binding of their native ligand, acetylcholine. Mutations in nAChRβ2 have been associated with resistance phenotypes to several neonicotinoid insecticides. [Date last reviewed: 2018-09-06]
Gene Group (FlyBase)
NICOTINIC ACETYLCHOLINE RECEPTOR SUBUNITS -
Nicotinic ligand-gated ion channels (nAChR) mediate the fast actions of the acetylcholine (ACh). The non-selective ion channel is formed from five subunits arranged around a central pore. The ACh binding site is formed by two adjacent α subunits. Other regulatory subunits may modulate channel pharmacology and expression. (Adapted from FBrf0183743).
Protein Function (UniProtKB)
After binding acetylcholine, the AChR responds by an extensive change in conformation that affects all subunits and leads to opening of an ion-conducting channel across the plasma membrane.
(UniProt, P25162)
Gene Model and Products
Number of Transcripts
2
Number of Unique Polypeptides
2

Please see the JBrowse view of Dmel\nAChRβ2 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
Structure
Protein 3D structure   (Predicted by AlphaFold)   (AlphaFold entry P25162)

If you don't see a structure in the viewer, refresh your browser.
Model Confidence:
  • Very high (pLDDT > 90)
  • Confident (90 > pLDDT > 70)
  • Low (70 > pLDDT > 50)
  • Very low (pLDDT < 50)

AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.

Experimentally Determined Structures
Crossreferences
Comments on Gene Model

Low-frequency RNA-Seq exon junction(s) not annotated.

Gene model reviewed during 5.47

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0084681
1892
519
FBtr0084682
4018
304
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
UniProt
RefSeq ID
GenBank
Polypeptides with Identical Sequences

None of the polypeptides share 100% sequence identity.

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

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\nAChRβ2 using the Feature Mapper tool.

External Data
Crossreferences
Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
Linkouts
Expression Data
Testis-specificity index

The testis specificity index was calculated from modENCODE tissue expression data by Vedelek et al., 2018 to indicate the degree of testis enrichment compared to other tissues. Scores range from -2.52 (underrepresented) to 5.2 (very high testis bias).

-0.46

Transcript Expression
RT-PCR
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

nAcRβ-96A protein is expressed in the lobula, lobula plate, and medulla of the adult optic lobe. There is no expression in the lamina. The medulla is strongly labled in layers 1, 2, 4, 6, and 9; labeling is less intense in layers 3,5,8, and 10, and absent in layer 7.

Marker for
 
Subcellular Localization
CV Term
Evidence
References
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\nAChRβ2 in JBrowse
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
DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 21 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 11 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of nAChRβ2
Transgenic constructs containing regulatory region of nAChRβ2
Aberrations (Deficiencies and Duplications) ( 2 )
Inferred from experimentation ( 2 )
Inferred from location ( 6 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (27)
12 of 14
Yes
No
12 of 14
Yes
Yes
11 of 14
No
Yes
9 of 14
No
Yes
5 of 14
No
Yes
5 of 14
No
Yes
4 of 14
No
Yes
4 of 14
No
No
1  
4 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
5  
1 of 14
No
No
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (18)
12 of 14
Yes
No
12 of 14
Yes
Yes
11 of 14
No
Yes
8 of 14
No
Yes
6 of 14
No
Yes
5 of 14
No
Yes
4 of 14
No
Yes
4 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
Mus musculus (laboratory mouse) (18)
12 of 14
Yes
No
12 of 14
Yes
Yes
11 of 14
No
Yes
8 of 14
No
Yes
5 of 14
No
Yes
5 of 14
No
Yes
4 of 14
No
Yes
4 of 14
No
No
4 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (25)
9 of 13
Yes
No
6 of 13
No
No
6 of 13
No
Yes
5 of 13
No
Yes
3 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
No
2 of 13
No
No
2 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
Danio rerio (Zebrafish) (32)
12 of 14
Yes
Yes
12 of 14
Yes
Yes
11 of 14
No
Yes
11 of 14
No
No
9 of 14
No
Yes
5 of 14
No
Yes
4 of 14
No
Yes
4 of 14
No
Yes
4 of 14
No
Yes
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (64)
11 of 14
Yes
No
10 of 14
No
No
5 of 14
No
No
5 of 14
No
Yes
5 of 14
No
Yes
4 of 14
No
Yes
3 of 14
No
No
3 of 14
No
No
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (17)
11 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (0)
Saccharomyces cerevisiae (Brewer's yeast) (0)
Schizosaccharomyces pombe (Fission yeast) (0)
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:nAChRβ2. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (22)
11 of 13
11 of 13
11 of 13
9 of 13
5 of 13
4 of 13
3 of 13
3 of 13
3 of 13
3 of 13
2 of 13
2 of 13
2 of 13
2 of 13
2 of 13
2 of 13
2 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 6 )
    Modifiers Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Interaction
    References
    Disease Associations of Human Orthologs (via DIOPT v9.1 and OMIM)
    Note that ortholog calls supported by only 1 or 2 algorithms (DIOPT score < 3) are not shown.
    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
    Interaction Browsers

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    Interaction Browsers
    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.
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    External Data
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3R
    Recombination map
    3-85
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    96A5-96A5
    Limits computationally determined from genome sequence between P{PZ}crb07207&P{PZ}BRWD305842 and P{EP}CycB3EP3127
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    96A3-96A3
    (determined by in situ hybridisation)
    96A-96A
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (29)
    Genomic Clones (20)
    cDNA Clones (48)
     

    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 JBrowse for alignment of the cDNAs and ESTs to the gene model.

    cDNA clones, fully sequenced
    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)
    RNAi and Array Information
    Linkouts
    DRSC - Results frm RNAi screens
    Antibody Information
    Laboratory Generated Antibodies
    Commercially Available Antibodies
     
    Cell Line Information
    Publicly Available Cell Lines
     
      Other Stable Cell Lines
       
        Other Comments

        Acr96Ac is expressed at high levels during late embryonic and late pupal stages, the transcripts are localized in the CNS.

        Relationship to Other Genes
        Source for database merge of
        Additional comments
        Nomenclature History
        Source for database identify of

        Source for identity of: nAcRβ-96A CG6798

        Source for identity of: nAChRβ2 nAcRβ-96A

        Nomenclature comments

        Renamed genes encoding nicotinic Acetylcholine Receptors to give systematic nomenclature that better reflects usage in literature (e.g. FBrf0218556, FBrf0183743).

        Etymology
        Synonyms and Secondary IDs (25)
        Reported As
        Symbol Synonym
        AcrF
        nACR beta 96A
        nAChR-β96A
        Name Synonyms
        nicotinic Acetylcholine Receptor beta 96A
        nicotinic Acetylcholine Receptor β2
        nicotinic acetylcholine receptor β2
        second beta-like subunit of Drosophila
        Secondary FlyBase IDs
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 48 )
          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 Nucleotide - A collection of sequences from several sources, including GenBank, RefSeq, TPA, and PDB.
          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/GCRP - The gene-centric reference proteome (GCRP) provides a 1:1 mapping between genes and UniProt accessions in which a single 'canonical' isoform represents the product(s) of each protein-coding gene.
          UniProt/Swiss-Prot - Manually annotated and reviewed records of protein sequence and functional information
          Other crossreferences
          AlphaFold DB - AlphaFold provides open access to protein structure predictions for the human proteome and other key proteins of interest, to accelerate scientific research.
          DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
          EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
          FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
          FlyMine - An integrated database for Drosophila genomics
          KEGG Genes - Molecular building blocks of life in the genomic space.
          MARRVEL_MODEL - MARRVEL (model organism gene)
          Linkouts
          Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
          DroID - A comprehensive database of gene and protein interactions.
          DRSC - Results frm RNAi screens
          Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
          FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
          FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
          Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
          Flygut - An atlas of the Drosophila adult midgut
          FlyMet - A comprehensive tissue-specific metabolomics resource for Drosophila.
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          References (126)