FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\eEF1α1
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General Information
Symbol
Dmel\eEF1α1
Species
D. melanogaster
Name
eukaryotic translation elongation factor 1 alpha 1
Annotation Symbol
CG8280
Feature Type
FlyBase ID
FBgn0284245
Gene Model Status
Stock Availability
Gene Summary
This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis. (UniProt, P08736)
Contribute a Gene Snapshot for this gene.
Also Known As

Ef1alpha48D, EF-1α, Ef1α48D, EF1α, l(2)00248

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-65
RefSeq locus
NT_033778 REGION:11891135..11895762
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (7 terms)
Molecular Function (3 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR000795
inferred from biological aspect of ancestor with PANTHER:PTN000561878
inferred from electronic annotation with InterPro:IPR004539
inferred from biological aspect of ancestor with PANTHER:PTN000562490
inferred from sequence or structural similarity
Biological Process (3 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from mutant phenotype
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000562490
inferred from electronic annotation with InterPro:IPR004539
inferred from sequence or structural similarity
involved_in translation
inferred from biological aspect of ancestor with PANTHER:PTN000561878
Cellular Component (1 term)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from sequence or structural similarity
Protein Family (UniProt)
Belongs to the TRAFAC class translation factor GTPase superfamily. Classic translation factor GTPase family. EF-Tu/EF-1A subfamily. (P08736)
Catalytic Activity (EC/Rhea)
GTPase activity
RHEA 19669:
Summaries
Gene Group (FlyBase)
CYTOPLASMIC TRANSLATION ELONGATION FACTORS -
Cytoplasmic (or eukaryotic) translation elongation factors function in the chain elongation stage of ribosome-mediated polypeptide synthesis in the cytoplasm. (Adapted from FBrf0233552).
TRANSLATIONAL GTPASES -
Translational GTPases are a family of GTPases that facilitate and control protein synthesis on the ribosome. (Adapted from PMID:26971860).
Protein Function (UniProtKB)
This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis.
(UniProt, P08736)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
Ef1α1: Elongation factor 1α #1
Encodes an α unit of the heterotrimeric protein, elongation factor 1, which promotes the binding of aminoacyl-tRNA to ribosomes. Originally isolated on the basis of its displaying 5 to 10 fold overexpression in females versus males. Ef1α1 is expressed throughout development. The rate of protein synthesis in Drosophila declines with age; this has been attributed to impaired binding of aminoacyl-tRNA to ribosomes, which is promoted by elongation- factor 1 (EF1); transcription of elongation factor-1 mRNA shown to decrease with age; by fifteen days following emergence the level of EF1 mRNA is but a few percent that of newly emerged adults (Webster and Webster, 1984, Mech. Ageing Dev. 24: 335-42). Transformation with Ef1α1 under the control of heat shock promoter increased the mean life span from 38.2 to 45.1 days at 25 and from 21.1 to 29.8 days at 29 (Shepherd et al.).
Gene Model and Products
Number of Transcripts
4
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\eEF1α1 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 P08736)

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

Gene model reviewed during 5.45

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

Gene model reviewed during 5.55

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0088035
2029
463
FBtr0331927
2278
463
FBtr0345022
1979
463
FBtr0345023
2076
463
Additional Transcript Data and Comments
Reported size (kB)

2.0 (unknown)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0087142
50.3
463
9.60
FBpp0304260
50.3
463
9.60
Polypeptides with Identical Sequences

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

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\eEF1α1 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).

-1.70

Transcript Expression
dot blot
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Ef1α48D transcript is expressed in all developmental stages. Expression in females is 5 to 10-fold higher than in males.

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

Isolated from a pullout assay for proteins contained in clots from larval hemolymph and identified by mass spec.

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\eEF1α1 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
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 17 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 12 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of eEF1α1
Transgenic constructs containing regulatory region of eEF1α1
Aberrations (Deficiencies and Duplications) ( 32 )
Inferred from experimentation ( 32 )
Gene partially disrupted in
Inferred from location ( 9 )
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) (17)
12 of 14
Yes
No
11 of 14
No
Yes
9 of 14
No
Yes
4 of 14
No
No
4 of 14
No
No
4 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
3  
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
5  
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (9)
12 of 14
Yes
Yes
12 of 14
Yes
No
11 of 14
No
Yes
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Mus musculus (laboratory mouse) (8)
12 of 14
Yes
Yes
11 of 14
No
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (11)
11 of 13
Yes
Yes
10 of 13
No
No
6 of 13
No
Yes
6 of 13
No
No
6 of 13
No
Yes
3 of 13
No
No
2 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Danio rerio (Zebrafish) (16)
13 of 14
Yes
Yes
12 of 14
No
Yes
12 of 14
No
No
8 of 14
No
Yes
4 of 14
No
No
4 of 14
No
No
3 of 14
No
No
2 of 14
No
Yes
1 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
Caenorhabditis elegans (Nematode, roundworm) (13)
14 of 14
Yes
Yes
13 of 14
No
Yes
3 of 14
No
No
3 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
Anopheles gambiae (African malaria mosquito) (11)
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (18)
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
12 of 13
Yes
Yes
4 of 13
No
No
2 of 13
No
Yes
1 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
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
No
Saccharomyces cerevisiae (Brewer's yeast) (10)
13 of 13
Yes
Yes
13 of 13
Yes
Yes
5 of 13
No
No
3 of 13
No
Yes
3 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
No
Schizosaccharomyces pombe (Fission yeast) (7)
12 of 12
Yes
Yes
12 of 12
Yes
Yes
12 of 12
Yes
Yes
4 of 12
No
No
3 of 12
No
No
1 of 12
No
Yes
1 of 12
No
No
Escherichia coli (enterobacterium) (4)
8 of 11
Yes
Yes
1 of 11
No
No
1 of 11
No
No
1 of 11
No
No
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:eEF1α1. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (17)
11 of 13
9 of 13
9 of 13
2 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
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 ( 2 )
    Modifiers Based on Experimental Evidence ( 1 )
    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
    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
    Linkouts
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    External Data
    Linkouts
    KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
    Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2R
    Recombination map
    2-65
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    48C5-48C5
    Limits computationally determined from genome sequence between P{EP}walEP825&P{PZ}wal02516 and P{PZ}Ef1α48D01275
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    48C5-48C6
    (determined by in situ hybridisation)
    50D5-50D7
    (determined by in situ hybridisation)
    48C1-50D7
    48C5--6 48C6--8 48C7--8 48D1--2
    48D-48D
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Notes

    Determined by deletion mapping.

    Stocks and Reagents
    Stocks (20)
    Genomic Clones (10)
     

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

    cDNA Clones (1986)
     

    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)
      BDGP DGC clones
      Other clones
      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

          Identification: Enhancer trap expression pattern survey for loci expressed in the ring gland.

          In a sample of 79 genes with multiple introns, 33 showed significant heterogeneity in G+C content among introns of the same gene and significant positive correspondence between the intron and the third codon position G+C content within genes. These results are consistent with selection adding against preferred codons at the start of genes.

          Expression of transcript changes with adult age.

          Expression of Ef1α100E or Ef1α48D is not associated with an extended longevity phenotype.

          The report (FBrf0050863) that expression of Ef1α48D correlates with longevity cannot be confirmed by a study of the expression of this gene and of Ef1α100E in lines with extended longevity.

          An important aging control may be exerted at the level of Ef1α48D transcription but heat induced expression of Ef1α48D does not cause increased levels of Ef1α48D mRNA or protein.

          Enhanced expression of Ef1α48D increases the lifespan of mated females and makes local changes within the bounds of tradeoffs that are given by a pre-existing physiological structure whose basic nature is not changed by the treatment.

          Ef1α48D is the housekeeping gene that is needed in all growing cells. Individuals transformed with a P-element containing Ef1α48D sequences under heat shock control have a longer lifespan than wild type flies.

          Encodes an α unit of the heterotrimeric protein, elongation factor 1, which promotes the binding of aminoacyl-tRNA to ribosomes. Originally isolated on the basis of its displaying 5 to 10 fold overexpression in females versus males. Ef1α1 is expressed throughout development. The rate of protein synthesis in Drosophila declines with age; this has been attributed to impaired binding of aminoacyl-tRNA to ribosomes, which is promoted by elongation-factor 1 (EF1); transcription of elongation factor-1 mRNA shown to decrease with age; by fifteen days following emergence the level of EF1 mRNA is but a few percent that of newly emerged adults (Webster and Webster, 1984). Transformation with Ef1α1 under the control of heat shock promoter increased the mean life span from 38.2 to 45.1 days at 25oC and from 21.1 to 29.8 days at 29oC (Shepherd, Walldorf, Hug and Gehring, 1989).

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: Ef1α48D l(2)k07303

          Source for merge of: Ef1α48D l(2)00248

          Additional comments

          The Ef1α48D gene may have been derived from the Ef1α100E gene by retroposition.

          The Ef1α48D gene may be derived from the Ef1α100E gene by retroposition.

          "l(2)00248" probably corresponds to "Ef1α48D"; the P{PZ} insertion in the "l(2)0024800248" allele maps only 42bp upstream of the transcription start of the CT24517 transcript of "Ef1α48D".

          Not allelic to shot.

          Nomenclature History
          Source for database identify of

          Source for identity of: eEF1α1 Ef1α48D

          Nomenclature comments
          Etymology
          Synonyms and Secondary IDs (60)
          Reported As
          Symbol Synonym
          EF1-α
          EF1α 48D
          Ef1alpha48E
          Ef1α1
          anon-EST:Liang-1.17
          anon-EST:Liang-2.46
          chr2R:7409490..7409690
          chr2R:7410009..7410129
          eEF1α
          l(2)01275
          Name Synonyms
          Elongation factor 1 alpha
          Elongation factor 1 alpha 48D
          Elongation factor 1alpha48D
          Elongation factor 1α48D
          Translational elongation factor1
          elongation factor 1-alpha F1
          elongation factor 1alpha48D
          eukaryotic translation elongation factor 1 alpha 1
          lethal (2) 00248
          Secondary FlyBase IDs
          • FBgn0000556
          • FBgn0010480
          • FBgn0022092
          • FBgn0010459
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 68 )
          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/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.
          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
          KEGG Genes - Molecular building blocks of life in the genomic space.
          MARRVEL_MODEL - MARRVEL (model organism gene)
          Linkouts
          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
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          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
          Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
          References (198)