FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\Idgf4
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General Information
Symbol
Dmel\Idgf4
Species
D. melanogaster
Name
Imaginal disc growth factor 4
Annotation Symbol
CG1780
Feature Type
FlyBase ID
FBgn0026415
Gene Model Status
Stock Availability
Gene Summary
Cooperates with insulin-like peptides to stimulate the proliferation, polarization and motility of imaginal disk cells. May act by stabilizing the binding of insulin-like peptides to its receptor through a simultaneous interaction with both molecules to form a multiprotein signaling complex. (UniProt, Q9W303)
Contribute a Gene Snapshot for this gene.
Also Known As

DmIDGF4, IDGF

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
1-30
RefSeq locus
NC_004354 REGION:9927973..9930948
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (10 terms)
Molecular Function (3 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR011583
NOT enables chitinase activity
inferred from key residues
Biological Process (6 terms)
Terms Based on Experimental Evidence (4 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from mutant phenotype
inferred from direct assay
involved_in wound healing
inferred from mutant phenotype
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR001223
inferred from biological aspect of ancestor with PANTHER:PTN000126545
Cellular Component (1 term)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from high throughput direct assay
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000126545
non-traceable author statement
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the glycosyl hydrolase 18 family. IDGF subfamily. (Q9W303)
Summaries
Gene Group (FlyBase)
IMAGINAL DISC GROWTH FACTORS -
The Imaginal Disc Growth Factors (IDGF) belong to the 18-glycosylhydrolase family. IDGFs possess a single glyco18 domain which is catalytically inactive and may act as a chitin binding module. (Adapted from FBrf0231276 and FBrf0230884).
Protein Function (UniProtKB)
Cooperates with insulin-like peptides to stimulate the proliferation, polarization and motility of imaginal disk cells. May act by stabilizing the binding of insulin-like peptides to its receptor through a simultaneous interaction with both molecules to form a multiprotein signaling complex.
(UniProt, Q9W303)
Gene Model and Products
Number of Transcripts
3
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Idgf4 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 Q9W303)

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 5.51

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

Annotated transcripts do not represent all supported alternative splices within 5' UTR.

Gene model reviewed during 5.55

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0071393
1514
442
FBtr0071394
1541
442
FBtr0343030
1807
442
Additional Transcript Data and Comments
Reported size (kB)

1.500 (longest cDNA)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0071328
48.6
442
7.98
FBpp0071329
48.6
442
7.98
Polypeptides with Identical Sequences

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

442 aa isoforms: Idgf4-PA, Idgf4-PB, Idgf4-PC
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Post Translational Modification

Glycosylated.

(UniProt, Q9W303)
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\Idgf4 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).

-0.84

Transcript Expression
No Assay Recorded
Stage
Tissue/Position (including subcellular localization)
Reference
expression microarray
Stage
Tissue/Position (including subcellular localization)
Reference
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
organism

Comment: maternally deposited

Additional Descriptive Data

Idgf4 transcripts are expressed at all stages tested on northern blots but most heavily in mid-larval stages. Idgf4 transcripts are present in the yolk cytoplasm in the early embryo but are excluded from the blastoderm as it cellularizes. During gastrulation, transcripts are observed in rows parallel to the major invaginations including the ventral furrow, the cephalic furrow, and the anterior and posterior midgut invaginations. In late embryos, Idgf4 transcripts are observed in yolk cells, fat body, salivary glands, and in the tracheal system. In third instar larvae, Idgf4 transcripts are strongly expressed in fat body, the ring gland, and in lymph glands. Expression is also observed in the optic lobes, the central brain, and in imaginal discs. Duing oogenesis, Idgf4 transcripts are present in nurse cells and in the oocyte. While the patterns of expression of the four Idgf genes are in general very similar, they are differentially expressed in the larval salivary glands. Levels of Idgf2 and Idgf4 are generally higher than Idgf1 and Idgf3.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
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\Idgf4 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
Flygut - An atlas of the Drosophila adult midgut
Images
FlyExpress - Embryonic expression images (BDGP data)
  • Stages(s) 1-3
  • Stages(s) 4-6
  • Stages(s) 7-8
  • Stages(s) 9-10
  • Stages(s) 11-12
  • Stages(s) 13-16
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 2 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 5 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Idgf4
Transgenic constructs containing regulatory region of Idgf4
Aberrations (Deficiencies and Duplications) ( 1 )
Inferred from experimentation ( 1 )
Inferred from location ( 7 )
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) (7)
5 of 14
Yes
No
5 of 14
Yes
No
5 of 14
Yes
No
4 of 14
No
No
4 of 14
No
No
1  
1 of 14
No
No
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) (7)
4 of 14
Yes
No
4 of 14
Yes
No
4 of 14
Yes
No
3 of 14
No
No
3 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Mus musculus (laboratory mouse) (10)
5 of 14
Yes
No
5 of 14
Yes
No
5 of 14
Yes
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
3 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (6)
3 of 13
Yes
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
Yes
Danio rerio (Zebrafish) (9)
5 of 14
Yes
No
5 of 14
Yes
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
3 of 14
No
No
2 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (39)
4 of 14
Yes
No
4 of 14
Yes
No
4 of 14
Yes
No
4 of 14
Yes
No
4 of 14
Yes
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 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
No
2 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (29)
12 of 12
Yes
Yes
11 of 12
No
Yes
Arabidopsis thaliana (thale-cress) (9)
4 of 13
Yes
No
4 of 13
Yes
No
4 of 13
Yes
No
4 of 13
Yes
No
4 of 13
Yes
No
4 of 13
Yes
No
4 of 13
Yes
No
3 of 13
No
No
2 of 13
No
No
Saccharomyces cerevisiae (Brewer's yeast) (1)
4 of 13
Yes
No
Schizosaccharomyces pombe (Fission yeast) (0)
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Idgf4. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (20)
11 of 13
6 of 13
6 of 13
6 of 13
6 of 13
6 of 13
6 of 13
6 of 13
6 of 13
5 of 13
5 of 13
5 of 13
4 of 13
3 of 13
3 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 ( 1 )
    Human Ortholog
    Disease
    Evidence
    References
    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
    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
    BioGRID - A database of protein and genetic interactions.
    DroID - A comprehensive database of gene and protein interactions.
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    External Data
    Linkouts
    Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    X
    Recombination map
    1-30
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    9A3-9A3
    Limits computationally determined from genome sequence between P{EP}nejEP1149&P{EP}nejEP1179 and P{EP}α-Man-IEP1628&P{EP}α-Man-IEP1307
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (6)
    Genomic Clones (23)
    cDNA Clones (188)
     

    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
          Relationship to Other Genes
          Source for database merge of
          Additional comments
          Nomenclature History
          Source for database identify of
          Nomenclature comments
          Etymology
          Synonyms and Secondary IDs (10)
          Reported As
          Secondary FlyBase IDs
          • FBgn0026066
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 73 )
          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.
          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
          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
          BioGRID - A database of protein and genetic interactions.
          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
          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)
          MIST (protein-protein) - An integrated Molecular Interaction Database
          Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
          References (92)