FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\nub
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General Information
Symbol
Dmel\nub
Species
D. melanogaster
Name
nubbin
Annotation Symbol
CG34395
Feature Type
FlyBase ID
FBgn0085424
Gene Model Status
Stock Availability
Gene Summary
nubbin (nub) encodes a POU/homeodomain transcription factor that is expressed in the nascent wing primordium and is required for wing formation. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

Pdm1, pdm-1, Pdm, POU domain protein 1, dPOU-19

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-47
RefSeq locus
NT_033779 REGION:12587625..12628135
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (15 terms)
Molecular Function (6 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
Biological Process (7 terms)
Terms Based on Experimental Evidence (6 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
Cellular Component (2 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
located_in nucleus
inferred from direct assay
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
Protein Family (UniProt)
Belongs to the POU transcription factor family. Class-2 subfamily. (P31368)
Summaries
Gene Snapshot
nubbin (nub) encodes a POU/homeodomain transcription factor that is expressed in the nascent wing primordium and is required for wing formation. [Date last reviewed: 2019-03-14]
Gene Group (FlyBase)
POU HOMEOBOX TRANSCRIPTION FACTORS -
POU homeobox transcription factors are sequence-specific DNA binding proteins that regulate transcription. They are characterized by a POU-specific domain N-terminal to a homeodomain. POU proteins can bind as homodimers or heterodimers to DNA. (Adapted from FBrf0232555 and PMID:18797923).
Protein Function (UniProtKB)
DNA-binding regulatory protein implicated in early development. Involved in neuronal cell fate decision. Repressed directly or indirectly by the BX-C homeotic proteins.
(UniProt, P31368)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
nub: nubbin
Wings very small, opaque, curved spoonlike up or down; inflated at eclosion. Wing margins interrupted. Only one vein (L2 or L3) present. Halteres somewhat reduced. Viability excellent. RK1.
nub2
Wings small and spoonlike but less extreme than nub. Patches of dried blood on wings. Veins L1 to L4 almost indiscernible; L5 and alula frequently absent. Viability and fertility excellent. RK1.
nub62d
Wings very small and spoonlike. RK1.
Summary (Interactive Fly)

transcription factor - homeodomain and pou domain - involved in cell fate determination of a subset of temporally determined neural subtypes - morphology of sensory neurons is diversified through a series of suppressive transcriptional interactions involving Nubbin and Pdm2, Cut and transcription factors Scalloped and Vestigial - Nubbin and Teashirt mark barriers to clonal growth along the proximal-distal axis of the wing

Gene Model and Products
Number of Transcripts
3
Number of Unique Polypeptides
2

Please see the JBrowse view of Dmel\nub 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 P31368)

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

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0112642
4497
961
FBtr0112643
3267
601
FBtr0342628
2829
601
Additional Transcript Data and Comments
Reported size (kB)

3.3, 2.9, 2.8 (northern blot)

3.1 (northern blot)

4.9, 3.1, 2.6 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0111554
103.9
961
6.71
FBpp0111555
65.2
601
9.35
FBpp0309559
65.2
601
9.35
Polypeptides with Identical Sequences

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

601 aa isoforms: nub-PD, nub-PE
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments

nub protein was shown to be a weak octamer-dependent activator of transcription when expressed in yeast and is thought to require additional coactivators to function efficiently.

The pdm2 and nub proteins are most closely related to the human OCT1 and OCT2 proteins and most resemble class II POU proteins.

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\nub 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).

-0.51

Transcript Expression
No Assay Recorded
Stage
Tissue/Position (including subcellular localization)
Reference

Comment: reference states >=6 hr AEL

in situ
Stage
Tissue/Position (including subcellular localization)
Reference
antennal primordium

Comment: reported as procephalic ectoderm primordium

central brain primordium

Comment: reported as procephalic ectoderm primordium

visual primordium

Comment: reported as procephalic ectoderm primordium

dorsal head epidermis primordium

Comment: reported as procephalic ectoderm primordium

lateral head epidermis primordium

Comment: reported as procephalic ectoderm primordium

ventral head epidermis primordium

Comment: reported as procephalic ectoderm primordium

northern blot
Stage
Tissue/Position (including subcellular localization)
Reference

Comment: reference states 0-6 hr AEL

Comment: reference states 0-12 hr AEL

Additional Descriptive Data

Expression assayed at stages 9, 11, 13, and 17. Expression may be continuous between assayed stages in some tissues.

expressed first in SOP of this lineage expression subsequently decreases in presumptive glial cell, is re-established once gcm expression has been established, and then disappears by stage 16

Marker for
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
wing pouch

Comment: area that corresponds to distal region of wing

mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Antibody used is specific to the nub-PB and nub-PD epitopes.

nub marks the wing pouch and dorsal hinge.

Early in third instar, nub is expressed in a broad region from the pretarsus through the presumptive tarsal segments, up to the distal part of the dac domain in presumptive tarsal segment 2. By late third instar, nub expression disappears from the intersegmental region of true segments and the pretarsal region, remaining only in the joint-forming cells.

Between 4 and 12 hr APF, nub expression is proximally adjacent to EcollacZodd-rK111, which labels the proximal parts of all leg joints except those between tarsal subsegments.

nub protein is localized to proximal half of the true leg segments of leg discs; localization is proximal to that of bowl and TfAP-2.

tsh protein is expressed in the wing pouch and distal wing hinge, but not in the presumptive notum. Expression is mutually exclusive with that of tsh.

Expression first seen in the wing disc during middle to late second instar in an area that corresponds to the distal region of the wing. The nub domain is a bit broader than the rn domain.

Markers that uniquely identify the cells of the NB3-7 lineage were used to examine the serotonin expressing cell lineages.

Expression in procephalic neuroblasts stage 9-11: tritocerebrum - d1-6, v1, v5; deuterocerebrum - d1-8, v2-8; protocerebrum - ad1, ad2, ad4-9, ad12, ad15, ad17, av1, cd1-6, cd8-14, cd17, cd20, cd21, cv1, cv3-9, pd2, pd4, pd5, pd8, pd9, pd12, pd16, pv1-3

Protein is detected in ring pattern in proximal joint of third instar larval leg discs. At 34-38 hours after pupal formation protein is expressed in the tibial and not the tarsal leg joints in the proximal joint tissue and a subset of bristle lineage.

nub protein is expressed in the wing pouch region of the third instar wing disc.

nub is expressed in the lateral, but not the medial, of the paired ventro-lateral serotonergic neurons.

nub is expressed in early stages of the developing CNS in a highly dynamic pattern that includes roughly half of the neuroblasts and several ganglion mother cells. Here, nub and pdm2 are shown to be coexpressed in GMC4-2a but not in its progenitor neuroblast or its mature progeny.

Marker for
Subcellular Localization
CV Term
Evidence
References
located_in nucleus
inferred from direct assay
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\nub 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) 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 ( 20 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 27 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of nub
Transgenic constructs containing regulatory region of nub
Aberrations (Deficiencies and Duplications) ( 13 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Lethality
Allele
Sterility
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (84)
8 of 14
Yes
Yes
1  
7 of 14
No
Yes
6 of 14
No
Yes
1  
2 of 14
No
No
2 of 14
No
No
1  
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
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
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
2  
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
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 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  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1  
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
2  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
Yes
1  
1 of 14
No
No
1 of 14
No
No
2  
1 of 14
No
No
1 of 14
No
No
1  
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
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1  
1 of 14
No
No
0  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
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
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (25)
7 of 14
Yes
Yes
7 of 14
Yes
Yes
6 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
1 of 14
No
Yes
1 of 14
No
No
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
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
Mus musculus (laboratory mouse) (25)
8 of 14
Yes
Yes
7 of 14
No
Yes
6 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
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
0  
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
Xenopus tropicalis (Western clawed frog) (69)
7 of 13
Yes
Yes
6 of 13
No
Yes
4 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
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
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
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
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
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
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
Danio rerio (Zebrafish) (32)
7 of 14
Yes
Yes
5 of 14
No
Yes
5 of 14
No
Yes
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
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
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
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (30)
3 of 14
Yes
Yes
2 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
No
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
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) (33)
10 of 12
Yes
Yes
1 of 12
No
No
Arabidopsis thaliana (thale-cress) (9)
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
Saccharomyces cerevisiae (Brewer's yeast) (1)
1 of 13
Yes
No
Schizosaccharomyces pombe (Fission yeast) (0)
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:nub. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (32)
7 of 13
5 of 13
4 of 13
3 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 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 ( 1 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    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.
    Homo sapiens (Human)
    Gene name
    Score
    OMIM
    OMIM Phenotype
    DO term
    Complementation?
    Transgene?
    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
    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.
    SignaLink - A signaling pathway resource with multi-layered regulatory networks.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2L
    Recombination map
    2-47
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    33F1-33F2
    Limits computationally determined from genome sequence between P{lacW}bunk00612&P{EP}EP682EP682 and P{lacW}l(2)k07015k07015&P{PZ}l(2)rK639rK639
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    33F-33F
    (determined by in situ hybridisation)
    33F1-33F2
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (92)
    Genomic Clones (36)
    cDNA Clones (42)
     

    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
     
    Developmental Studies Hybridoma Bank - Monoclonal antibodies for use in research
    Cell Line Information
    Publicly Available Cell Lines
     
      Other Stable Cell Lines
       
        Other Comments

        nub/pdm2 and cas regulate late-born motor neuron identity within the NB7-1 lineage; nub/pdm2 specifies fourth-born U4 motor neuron identity, while nub/pdm2/cas together specify fifth-born U5 motor neuron identity.

        The embryonic CNS contains sequentially generated neuroblast sublineages that can be distinguished by their expression of either hb, nub or cas. hb and cas may directly silence nub expression in early and late developing sublineages, given that nub cis-regulatory DNA contains approximately 32 hb/cas-binding sites and its enhancer(s) are ectopically activated in cas- neuroblasts. Targeted misexpression of cas in all neuronal lineages reduces nub expression without altering hb expression. By ensuring correct POU gene expression boundaries hb and cas maintain temporal subdivisions in the cell-identity circuitry controlling CNS development.

        The POU domain protein encoded by nub contributes to the formation of a sharp dorsoventral boundary in the wing.

        The expression patterns of crustacean homologues of nub and ap support the hypothesis that insect wings evolved from gill-like appendages that were present in the aquatic ancestors of both crustaceans and insects.

        nub gene is important for correct proximal-distal specification of the growing wing imaginal disc.

        Incorrect specification of the proximal-distal axis of the growing wing imaginal disc due to mutations in nub leads to failures in growth along both the D-V and A-P axis.

        Isolated from a Drosophila 10-22 hour embryo cDNA expression library, using a 22bp sequence from the Cha upstream regulatory region as a probe. This 22bp sequence has been shown to be bound by specific binding factor(s) in embryo nuclear extracts.

        nub mutants do not interact genetically with mutations in ap, Bx, ct, sens, N, sd, Ser, wg, vg, wg. The mutant wing phenotype is distinct from those of ap, vg, sd and fu.

        nub is required for the normal growth and patterning of the wing. Mosaic analysis reveals a localized requirement for nub activity in the wing hinge.

        Within the hierarchy of genes expressed in GMC4-2a nub and pdm2 lie downstream of pros and ftz and upstream of eve.

        nub and pdm2 both contribute toward the development of a full complement of mature RP2 neurons by being expressed in and acting on ganglion mother cell 2a (GMC-2a), the RP2 progenitor cell. nub plays a quantitatively less important role than pdm2. nub and pdm2 act to specify GMC-2a cell identity and not merely act to positively regulate GMC-2a cell division.

        Proper spatial regulation of nub involves the interaction between the mesoderm and the endoderm, but uses a different genetic cascade than that regulating lab : dpp is not the signal that dictates central nub repression across germ layers.

        One of the homeodomain loci identified in a screen for genes encoding DNA binding proteins capable of binding to a consensus en binding site.

        nub is transcribed in elements of the developing nervous system suggesting a functional role in neurogenesis and neurospecification.

        nub contains a POU domain, and is expressed at maximum levels during early development.

        Relationship to Other Genes
        Source for database merge of

        Source for merge of: nub CG15488 CG15489

        Additional comments

        Annotations CG6246, CG15489 and CG15488 merged as CG34395 in release 5.2 of the genome annotation.

        Nomenclature History
        Source for database identify of

        Source for identity of: nub CG6246

        Nomenclature comments
        Etymology
        Synonyms and Secondary IDs (32)
        Reported As
        Symbol Synonym
        Pdm1/nubbin
        nub
        (Cruz et al., 2024, Dong et al., 2023, Floc'hlay et al., 2023, McQuarrie et al., 2023, Loker and Mann, 2022, Ray et al., 2022, Velten et al., 2022, Everetts et al., 2021, Kong et al., 2021, Loker et al., 2021, Mahmud et al., 2020, Nystrom et al., 2020, Port et al., 2020, Ahmad and Spens, 2019, Belmonte et al., 2019, Oberst et al., 2019, Sapar and Han, 2019, Shokri et al., 2019, Villanueva-Cañas et al., 2019, Aughey et al., 2018, Bischof et al., 2018, Tang et al., 2018, Croze et al., 2017, Karaiskos et al., 2017, Kojima, 2017, Transgenic RNAi Project members, 2017-, Bürglin and Affolter, 2016, Dantoft et al., 2016, Gabilondo et al., 2016, Duque and Sinha, 2015, Schertel et al., 2015, Ghavi-Helm et al., 2014, Marr et al., 2014, Neville et al., 2014, Shukla et al., 2014, Aleksic et al., 2013, Combs and Eisen, 2013, Dantoft et al., 2013, Herrera et al., 2013, Iyer et al., 2013, Li and Gilmour, 2013, Perea et al., 2013, Crombach et al., 2012, Hadar et al., 2012, Japanese National Institute of Genetics, 2012.5.21, Kao et al., 2012, Kim et al., 2012, Nfonsam et al., 2012, Zhou et al., 2012, Bellen et al., 2011, Lee et al., 2011, Liu et al., 2011, Matta et al., 2011, Schrider et al., 2011, Turchyn et al., 2011, Karlsson et al., 2010, Kazemian et al., 2010, Losada-Pérez et al., 2010, Wasbrough et al., 2010, Dichtel-Danjoy et al., 2009, Fang et al., 2009, Perea et al., 2009, Yamamoto et al., 2009.2.25, Segal et al., 2008, Takacs et al., 2008, Terriente et al., 2008, Yu and Small, 2008, Barrio et al., 2007, Ciechanska et al., 2007, Hueber et al., 2007, Zirin and Mann, 2007, Molnar and de Celis, 2006, Wheeler et al., 2006, Morrow et al., 2005, Berman et al., 2004, Grad et al., 2004, Kreiman, 2004, Averof and Cohen, 1997)
        twn
        Secondary FlyBase IDs
        • FBgn0032438
        • FBan0015488
        • FBgn0002970
        • FBan0006246
        • FBgn0032440
        • FBgn0004393
        Datasets (0)
        Study focus (0)
        Experimental Role
        Project
        Project Type
        Title
        Study result (0)
        Result
        Result Type
        Title
        External Crossreferences and Linkouts ( 61 )
        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
        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
        Developmental Studies Hybridoma Bank - Monoclonal antibodies for use in research
        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)
        Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
        MIST (protein-protein) - An integrated Molecular Interaction Database
        Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
        SignaLink - A signaling pathway resource with multi-layered regulatory networks.
        References (458)