FB2025_05 , released December 11, 2025
Gene: Dmel\Vha26
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General Information
Symbol
Dmel\Vha26
Species
D. melanogaster
Name
Vacuolar H+-ATPase 26kD subunit
Annotation Symbol
CG1088
Feature Type
FlyBase ID
FBgn0283535
Gene Model Status
Stock Availability
Gene Summary
Vacuolar H[+]-ATPase 26kD subunit (Vha26) encodes the E subunit of the V1 domain of the vacuolar ATPase that is required for the morphology of tracheal cells. [Date last reviewed: 2019-09-26] (FlyBase Gene Snapshot)
Also Known As

Vacuolar H+-ATPase 26kD E subunit, oak gall, vATPase, ATP6V1E1

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-47.5
RefSeq locus
NT_033777 REGION:5591763..5595356
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (9 terms)
Molecular Function (1 term)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
Biological Process (4 terms)
Terms Based on Experimental Evidence (3 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from high throughput mutant phenotype
inferred from mutant phenotype
inferred from high throughput mutant phenotype
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred by curator from GO:0033181
inferred from electronic annotation with InterPro:IPR002842
Cellular Component (4 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
located_in plasma membrane
inferred from high throughput direct assay
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
Protein Family (UniProt)
Belongs to the V-ATPase E subunit family. (P54611)
Catalytic Activity (EC/Rhea)
proton-transporting ATPase activity, rotational mechanism
RHEA 57721:
Summaries
Gene Snapshot
Vacuolar H[+]-ATPase 26kD subunit (Vha26) encodes the E subunit of the V1 domain of the vacuolar ATPase that is required for the morphology of tracheal cells. [Date last reviewed: 2019-09-26]
Gene Group (FlyBase)
VACUOLAR ATPASE V1 DOMAIN NON-CATALYTIC SUBUNITS -
The V1 domain of V-ATPases is a peripheral membrane domain composed of eight different subunits (A-H) that are expressed as multiple isoforms in a tissue-specific manner. The V1 domain is responsible for ATP hydrolysis. The non-catalytic V1 subunits do not hydrolyze ATP directly but provide regulatory functions and/or interact with the V0 domain. (Adapted from PMID:20450191 and FBrf0188241).
Protein Function (UniProtKB)
Subunit of the V1 complex of vacuolar(H+)-ATPase (V-ATPase), a multisubunit enzyme composed of a peripheral complex (V1) that hydrolyzes ATP and a membrane integral complex (V0) that translocates protons (By similarity). V-ATPase is responsible for acidifying and maintaining the pH of intracellular compartments and in some cell types, is targeted to the plasma membrane, where it is responsible for acidifying the extracellular environment (By similarity).
(UniProt, P54611)
Gene Model and Products
Number of Transcripts
3
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Vha26 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 P54611)

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 5.46

Gene model reviewed during 5.56

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0078701
2269
226
FBtr0078700
2171
226
FBtr0346137
2926
226
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
FBpp0078350
26.1
226
5.96
FBpp0078349
26.1
226
5.96
Polypeptides with Identical Sequences

The group(s) of polypeptides indicated below share identical sequence to each other.

226 aa isoforms: Vha26-PA, Vha26-PB, Vha26-PC
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Subunit Structure (UniProtKB)

V-ATPase is a heteromultimeric enzyme made up of two complexes: the ATP-hydrolytic V1 complex and the proton translocation V0 complex (By similarity). The V1 complex consists of three catalytic AB heterodimers that form a heterohexamer, three peripheral stalks each consisting of EG heterodimers, one central rotor including subunits D and F, and the regulatory subunits C and H (By similarity). The proton translocation complex V0 consists of the proton transport subunit a, a ring of proteolipid subunits c9c'', rotary subunit d, subunits e and f, and the accessory subunits VhaAC45 and ATP6AP2 (By similarity).

(UniProt, P54611)
Crossreferences
InterPro - A database of protein families, domains and functional sites
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\Vha26 using the Feature Mapper tool.

External Data
Crossreferences
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).

-0.81

Transcript Expression
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
located_in plasma membrane
inferred from high throughput direct assay
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Vha26 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
BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
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
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 4 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 6 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Vha26
Transgenic constructs containing regulatory region of Vha26
Aberrations (Deficiencies and Duplications) ( 2 )
Inferred from experimentation ( 2 )
Inferred from location ( 5 )
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) (2)
14 of 14
Yes
Yes
1  
12 of 14
No
Yes
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (2)
14 of 14
Yes
Yes
12 of 14
No
Yes
Mus musculus (laboratory mouse) (2)
13 of 14
Yes
Yes
12 of 14
No
Yes
Xenopus tropicalis (Western clawed frog) (1)
8 of 13
Yes
Yes
Danio rerio (Zebrafish) (2)
14 of 14
Yes
Yes
13 of 14
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (6)
14 of 14
Yes
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
Anopheles gambiae (African malaria mosquito) (1)
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (3)
13 of 13
Yes
Yes
12 of 13
No
Yes
12 of 13
No
Yes
Saccharomyces cerevisiae (Brewer's yeast) (1)
12 of 13
Yes
Yes
Schizosaccharomyces pombe (Fission yeast) (1)
12 of 12
Yes
Yes
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Vha26. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
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 ( 1 )
    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
    RNA-protein
    Physical Interaction
    Assay
    References
    RNA-RNA
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    Interaction Browsers

    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
    Subunit Structure (UniProtKB)
    V-ATPase is a heteromultimeric enzyme made up of two complexes: the ATP-hydrolytic V1 complex and the proton translocation V0 complex (By similarity). The V1 complex consists of three catalytic AB heterodimers that form a heterohexamer, three peripheral stalks each consisting of EG heterodimers, one central rotor including subunits D and F, and the regulatory subunits C and H (By similarity). The proton translocation complex V0 consists of the proton transport subunit a, a ring of proteolipid subunits c9c'', rotary subunit d, subunits e and f, and the accessory subunits VhaAC45 and ATP6AP2 (By similarity).
    (UniProt, P54611 )
    Linkouts
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    KEGG Metabolic Pathways - A collection of manually drawn metabolic pathway maps representing knowledge of molecular interaction, reaction and relation networks.
    External Data
    Linkouts
    KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3R
    Recombination map
    3-47.5
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    83B4-83B4
    Limits computationally determined from genome sequence between P{PZ}Snr101319&P{PZ}Itp-r83A05616 and P{lacW}Atus1938
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    83B1-83B4
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (6)
    Genomic Clones (13)
     

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

    cDNA Clones (226)
     

    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
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          Nonsense-mediated mRNA decay (NMD) down-regulates a distinct splice isoform(s) of this gene.

          dsRNA made from templates generated with primers directed against Vha26 that is transfected into S2 treated with Listeria monocytogenes reveals Vha26 to be involved in Listeria monocytogenes entry and vacuolar escape.

          Transcription unit identified during molecular analysis of the noi gene region.

          Isolated using a M.sexta V-ATPase E-subunit cDNA.

          Vha26 has been cloned and characterised.

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: Vha26 BcDNA:GH03683

          Source for merge of: Vha26 anon-83Bb

          Source for merge of: Vha26 oak-gall

          Additional comments

          Source for merge of Vha26 BcDNA:GH03683 was sequence comparison ( date:990717 ).

          Nomenclature History
          Source for database identify of

          Source for identity of: Vha26 CG1088

          Nomenclature comments
          Etymology
          Synonyms and Secondary IDs (19)
          Reported As
          Symbol Synonym
          BcDNA.GH03683
          BcDNA:GH03683
          VhaE
          anon-83Bb
          chr3R:1419698..1419836
          oak-gall
          Name Synonyms
          E subunit
          Vacuolar H+ATPase subunit E
          Vacuolar H+-ATPase 26 kD E subunit
          Vacuolar H+-ATPase 26kD subunit
          vacuolar ATP synthase subunit E
          Secondary FlyBase IDs
          • FBgn0015324
          • FBgn0024707
          • FBgn0264655
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 49 )
          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
          UniProt/TrEMBL - Automatically annotated and unreviewed 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.
          BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
          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
          InterPro - A database of protein families, domains and functional sites
          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
          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
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          KEGG Metabolic Pathways - A collection of manually drawn metabolic pathway maps representing knowledge of molecular interaction, reaction and relation networks.
          KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
          MIST (protein-protein) - An integrated Molecular Interaction Database
          References (120)