FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\babo
Open Close
General Information
Symbol
Dmel\babo
Species
D. melanogaster
Name
baboon
Annotation Symbol
CG8224
Feature Type
FlyBase ID
FBgn0011300
Gene Model Status
Stock Availability
Enzyme Name (EC)
receptor protein serine/threonine kinase (2.7.11.30)
Gene Summary
baboon (babo) encodes the type I receptor for the activin-like ligands encoded by daw, Actβ and myo. There are three isoforms of the product of babo that differ only in their extracellular domain likely resulting in different ligand binding specificity. It can form a complex with the type II receptors put or wit in the presence of an activin like ligand. This results in the transcriptional regulation of activin responsive genes. [Date last reviewed: 2019-03-07] (FlyBase Gene Snapshot)
Also Known As

Atr-I, AtrI, Atr45A, Activin A receptor 45A, l(2)k16912

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-59
RefSeq locus
NT_033778 REGION:8952339..8962796
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (33 terms)
Molecular Function (8 terms)
Terms Based on Experimental Evidence (5 terms)
CV Term
Evidence
References
inferred from direct assay
inferred from physical interaction with UniProtKB:Q9V4F4
inferred from direct assay
inferred from physical interaction with FLYBASE:put; FB:FBgn0003169
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
Biological Process (22 terms)
Terms Based on Experimental Evidence (18 terms)
CV Term
Evidence
References
involved_in axon guidance
inferred from mutant phenotype
inferred from mutant phenotype
acts_upstream_of_positive_effect determination of adult lifespan
inferred from mutant phenotype
inferred from genetic interaction with FLYBASE:smo; FB:FBgn0003444
inferred from genetic interaction with FLYBASE:ptc; FB:FBgn0003892
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
involved_in neuron development
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from direct assay
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000583887
non-traceable author statement
inferred from biological aspect of ancestor with PANTHER:PTN000583887
Cellular Component (3 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 (3 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000583887
is_active_in plasma membrane
inferred from biological aspect of ancestor with PANTHER:PTN002758232
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. TGFB receptor subfamily. (A1Z7L8)
Catalytic Activity (EC/Rhea)
protein serine/threonine kinase activity
transmembrane receptor protein serine/threonine kinase activity
(1) L-seryl-[receptor-protein] + ATP = O-phospho-L-seryl-[receptor- protein] + ADP + H(+) (2.7.11.30)
(2) L-threonyl-[receptor-protein] + ATP = O-phospho-L-threonyl-[receptor- protein] + ADP + H(+) (2.7.11.30)
RHEA 18673:
Summaries
Gene Snapshot
baboon (babo) encodes the type I receptor for the activin-like ligands encoded by daw, Actβ and myo. There are three isoforms of the product of babo that differ only in their extracellular domain likely resulting in different ligand binding specificity. It can form a complex with the type II receptors put or wit in the presence of an activin like ligand. This results in the transcriptional regulation of activin responsive genes. [Date last reviewed: 2019-03-07]
Pathway (FlyBase)
ACTIVIN SIGNALING PATHWAY CORE COMPONENTS -
The activin signaling pathway is one of two branches of Transforming Growth Factor-β family signaling in Drosophila. The binding of an activin family dimer to a heterodimeric serine/threonine kinase receptor complex results in the phosphorylation of Smox, a members of the Smad family. Smox forms a complex with the co-Smad, Med. This complex translocates into the nucleus and regulates the transcription of target genes in concert with other nuclear cofactors. (Adapted from FBrf0236482.)
Gene Group (FlyBase)
TGF-BETA TYPE I RECEPTORS -
The Transforming Growth Factor-β Receptor (TGF-βR) family are transmembrane serine/threonine kinases. They form heterodimeric receptor complexes composed of type I and type II subunits. Upon ligand binding, the constitutively active type II receptor phosphorylates the type I receptor which, in turn, phosphorylates a member of the Smad family. (Adapted from FBrf0236482.)
Protein Function (UniProtKB)
Type I transmembrane receptor serine/threonine kinase involved in the activin-like TGF-beta signaling pathway (PubMed:10320478, PubMed:17119022, PubMed:18820452, PubMed:8289834). Forms a receptor complex with a type II transmembrane receptor serine/threonine kinase, and upon activation by an activin/TGF-beta-like ligand phosphorylates downstream receptor-regulated SMAD (R-SMAD) transcription factors, inducing their nuclear localization resulting in regulation of activin/TGF-beta-responsive genes (PubMed:10320478, PubMed:17119022, PubMed:18820452, PubMed:8289834). When part of a heteromeric complex with the type I receptor put/punt can be activated by the activin/TGF-beta-like ligands Actbeta/activin, daw/dawdle and possibly myo/myoglianin; ligand specificity is probably isoform-dependent (PubMed:17119022, PubMed:18820452, PubMed:8289834). Upon activation phosphorylates the R-SMAD Smox/SMAD2 to activate the canonical TGF-beta pathway (PubMed:10320478, PubMed:17119022, PubMed:18820452, PubMed:19766717, PubMed:9887103). Can also phosphorylate Mad, the R-SMAD of the dpp BMP-like signaling pathway, in response to daw signaling but to a lesser extent (PubMed:18820452, PubMed:22563507). Phosphorylation of Mad is competitively regulated by Smox/SMAD2 (PubMed:22563507). Positive regulator of cell proliferation, probably through activation of the SMAD2-dependent activin signaling pathway (PubMed:9887103). Required for normal proliferation of medulla neuroblasts and laminar precursor cells in the optic lobe (PubMed:18171686). Involved in regulation of the ecdysteroid hormone receptor EcR in neuronal cells throughout the central nervous system (PubMed:38913612). Involved in axonal and dendritic pruning and neural remodeling of mushroom body gamma neurons during metamorphosis through regulation of EcR (PubMed:12581521). Involved in differentiation of dorsal cluster and ellipsoid body adult-specific neurons prior to metamorphosis (PubMed:16437159). Required in motoneurons for axon guidance or outgrowth of ISNb and SNa axons (PubMed:17119022). Involved in regulation of wing growth (PubMed:18820452). Signaling by daw or myo is involved in lifespan determination through regulation of proteasome-mediated degradation of misfolded or damaged proteins (PubMed:29615416).
(UniProt, A1Z7L8)
Summary (Interactive Fly)

transmembrane protein - Type 1 activin-A-receptor for ligands Dawdle, Activin-β and Myoglianin - essential for proper pupation and adult viability - alternatively spliced into isoforms that differ only in their extracellular domain likely resulting in different ligand binding specificity

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

Please see the JBrowse view of Dmel\babo 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 A1Z7L8)

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 5.49

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0088659
4776
601
FBtr0088658
4839
622
FBtr0300599
4758
595
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
FBpp0087740
67.3
601
7.83
FBpp0087739
69.3
622
8.21
FBpp0289826
66.0
595
7.08
Polypeptides with Identical Sequences

None of the polypeptides share 100% sequence identity.

Additional Polypeptide Data and Comments
Reported size (kDa)

622, 601 (aa)

Comments

babo protein activates TGF-β/Activin response elements, but not BMP response elements, in in vitro assays. Activated babo protein phosphorylates the C-terminal SSXS motif of Smox protein. Med and Smox proteins form some complexes in the absence of activated babo protein, but the level of complex formation increases significantly in the presence of the activated babo protein. Smox protein also interacts transiently with putFBtr0091350:pb-XRbabo protein complexes.

External Data
Subunit Structure (UniProtKB)

Interacts with put; forms a heteromeric receptor complex that can bind the activin-type ligand Actbeta (PubMed:8289834). As part of the babo-put complex associates with Smox/SMAD2; dissociates upon phosphorylation of Smox (PubMed:10320478, PubMed:9887103).

(UniProt, A1Z7L8)
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\babo 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).

-1.92

Transcript Expression
expression microarray
Stage
Tissue/Position (including subcellular localization)
Reference
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
northern blot
Stage
Tissue/Position (including subcellular localization)
Reference

Comment: reference states 0-3 hr AEL

RT-PCR
Stage
Tissue/Position (including subcellular localization)
Reference
larval brain

Comment: isoform-specific expression

wing disc

Comment: isoform-specific expression

embryonic/larval fat body

Comment: isoform-specific expression

embryonic/larval gut

Comment: isoform-specific expression

Additional Descriptive Data

Isoform-specific expression for three splice variants of babo was demonstrated. One isoform is detected in brain and wing disc, one is detected predominantly in wing disc, and the third isoform is detected in fat body and gut but not brain or wing disc.

The 3.6 and 4.0 kb babo transcripts are found in 0-3 hr embryos, and in adult females.

The 4.9 kb babo transcript is expressed throughout development.

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
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\babo 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
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 32 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 42 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of babo
Transgenic constructs containing regulatory region of babo
Aberrations (Deficiencies and Duplications) ( 20 )
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
adult mushroom body & axon
antennal lobe & axon
axon & photoreceptor cell
axon & photoreceptor cell R7 (with babo32)
axon & photoreceptor cell R7 (with babo52)
axon & photoreceptor cell R8 (with babo32)
axon & photoreceptor cell R8 (with babo52)
calyx of mushroom body & axon
dorsal cluster neuron & axon | somatic clone
dorsal cluster neuron & neurite | somatic clone
gamma-lobe & dendrite | somatic clone
gamma-lobe & neuron | somatic clone
ganglion mother cell & larval optic lobe (with babo32)
ganglion mother cell & larval optic lobe (with babo52)
olfactory neuron & axon
olfactory neuron & dendrite
photoreceptor cell R7 & axon (with babo32)
photoreceptor cell R7 & axon (with babo52)
photoreceptor cell R8 & axon (with babo32)
photoreceptor cell R8 & axon (with babo52)
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (25)
12 of 14
Yes
Yes
1  
12 of 14
Yes
Yes
12 of 14
Yes
Yes
6 of 14
No
No
3  
6 of 14
No
No
5 of 14
No
No
5 of 14
No
No
1  
2 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
3  
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
3  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
9  
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) (14)
12 of 14
Yes
Yes
12 of 14
Yes
Yes
11 of 14
No
Yes
6 of 14
No
No
5 of 14
No
No
5 of 14
No
No
4 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
Yes
1 of 14
No
Yes
1 of 14
No
No
Mus musculus (laboratory mouse) (13)
12 of 14
Yes
Yes
12 of 14
Yes
Yes
12 of 14
Yes
Yes
6 of 14
No
No
5 of 14
No
No
5 of 14
No
No
5 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
Yes
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (20)
9 of 13
Yes
Yes
8 of 13
No
Yes
6 of 13
No
Yes
4 of 13
No
No
3 of 13
No
No
3 of 13
No
No
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
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
Danio rerio (Zebrafish) (21)
12 of 14
Yes
Yes
12 of 14
Yes
Yes
12 of 14
Yes
Yes
12 of 14
Yes
Yes
12 of 14
Yes
Yes
6 of 14
No
No
5 of 14
No
No
5 of 14
No
No
4 of 14
No
No
4 of 14
No
No
4 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
Caenorhabditis elegans (Nematode, roundworm) (11)
8 of 14
Yes
Yes
8 of 14
Yes
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) (13)
12 of 12
Yes
Yes
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (102)
1 of 13
Yes
Yes
1 of 13
Yes
Yes
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
Yes
1 of 13
Yes
Yes
1 of 13
Yes
Yes
1 of 13
Yes
Yes
1 of 13
Yes
Yes
1 of 13
Yes
Yes
1 of 13
Yes
Yes
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
Yes
1 of 13
Yes
No
1 of 13
Yes
Yes
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
Yes
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
Yes
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
Yes
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
Yes
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
Yes
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
Yes
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
Yes
1 of 13
Yes
Yes
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
Yes
1 of 13
Yes
Yes
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
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
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
Yes
1 of 13
Yes
Yes
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
Yes
1 of 13
Yes
Yes
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
Yes
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:babo. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (11)
9 of 13
9 of 13
3 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
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 ( 2 )
    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
    Subunit Structure (UniProtKB)
    Interacts with put; forms a heteromeric receptor complex that can bind the activin-type ligand Actbeta (PubMed:8289834). As part of the babo-put complex associates with Smox/SMAD2; dissociates upon phosphorylation of Smox (PubMed:10320478, PubMed:9887103).
    (UniProt, A1Z7L8 )
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    DroID - A comprehensive database of gene and protein interactions.
    MIST (genetic) - An integrated Molecular Interaction Database
    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.
    SignaLink - A signaling pathway resource with multi-layered regulatory networks.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2R
    Recombination map
    2-59
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    44F11-44F12
    Limits computationally determined from genome sequence between P{lacW}Dmnk16109&P{lacW}Gγ1k08017 and P{lacW}babok16912
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    44F11-44F12
    (determined by in situ hybridisation)
    45A1-45A2
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (35)
    Genomic Clones (16)
     

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

    cDNA Clones (81)
     

    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
      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

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

        babo is required for generating the normal number of medulla neuroblasts and laminar precursor cells in the developing optic lobe.

        babo is required in R7 neurons to mediate a normal preference for UV light.

        babo is required during the late larval stage for development of adult-specific neurons.

        dsRNA made from templates generated with primers directed against this gene tested in RNAi screen for effects on Kc167 and S2R+ cell morphology.

        babo/Smox mediated TGFΒ/Activin signalling mediates remodeling of mushroom body neurons via controlling EcR-B1 expression.

        ptc-smo signalling has a role in head morphogenesis to promote cell proliferation via activation of babo.

        Null mutations and germ line clone analysis demonstrate that babo is not required during embryogenesis but is essential for proper pupation and adult viability. The major defect in mutants is a reduction of cell proliferation within the primordia for adult structures.

        Activated babo cannot bind to or interact with Mad in tissue culture but can utilize Smox. In direction of increasing cytology: l(2)44Fc? babo+

        babo primarily regulates cell proliferation and has only minimal effects on patterning. The babo pathway is distinct from dpp/BMP signalling.

        Candidate gene for tibia length quantitative trait locus.

        The babo phenotype is larval to pupal lethal. Molecular analysis of a mutant line indicates the lethality is solely caused by the insertion of a P-element.

        Biochemical characterisation of babo, a receptor that binds activin only when coexpressed with type II receptors with which it forms a complex, demonstrates the structural and ligand-binding properties of babo are those of an activin type I receptor. These observations suggest that heteromeric kinase receptor structure is broadly conserved in metazoa.

        Relationship to Other Genes
        Source for database merge of

        Source for merge of: babo l(2)k16912 l(2)44Fd

        Source for merge of: babo Gprk3

        Additional comments
        Nomenclature History
        Source for database identify of
        Nomenclature comments
        Etymology
        Synonyms and Secondary IDs (25)
        Reported As
        Symbol Synonym
        Atf1
        Gprk3
        babo
        (Bretscher and O'Connor, 2025, Klimkowski Arango and Morgante, 2025, Lee et al., 2025, Sheng et al., 2025, Ell et al., 2024, Everman and Macdonald, 2024, Lauraine et al., 2024, Krejčová et al., 2023, Lassetter et al., 2023, Bilder et al., 2021, Evans et al., 2021, Everetts et al., 2021, Fabian et al., 2021, Furusawa and Emoto, 2021, Herrera et al., 2021, Hertenstein et al., 2021, Joseph and Lai, 2021, Kim and O'Connor, 2021, Ostalé et al., 2021, Lai et al., 2020, Mira and Morante, 2020, Port et al., 2020, Rathore et al., 2020, Upadhyay et al., 2020, Hudry et al., 2019, Moss-Taylor et al., 2019, Raza et al., 2019, Wang et al., 2019, Zhu et al., 2019, Gene Disruption Project members, 2018-, Hoyer et al., 2018, Kanai et al., 2018, Ma et al., 2018, Muñoz-Soriano et al., 2018, Setiawan et al., 2018, Song et al., 2018, Jeibmann et al., 2017, Katti et al., 2017, Makhijani et al., 2017, Song et al., 2017, Transgenic RNAi Project members, 2017-, Feoktistov and Herman, 2016, Sarov et al., 2016, Shen et al., 2016, Bornstein et al., 2015, Kanoh et al., 2015, Lengil et al., 2015, Ugrankar et al., 2015, Cantera et al., 2014, Sopko et al., 2014, Ting et al., 2014, Ting et al., 2014, Bai et al., 2013, Hevia and de Celis, 2013, Kniss et al., 2013, Marinho et al., 2013, Peterson and O'Connor, 2013, Yu et al., 2013, Boulanger et al., 2012, Japanese National Institute of Genetics, 2012.5.21, Peterson et al., 2012, Takaesu et al., 2012, Awasaki et al., 2011, Awasaki et al., 2011, Boulanger et al., 2011, Clark et al., 2011, Dworkin et al., 2011, Hadjieconomou et al., 2011, Cook et al., 2010.2.12, Ellis et al., 2010, Rallis et al., 2010, Hartmann et al., 2009, Jensen et al., 2009, Pentek et al., 2009, Ng, 2008, Schuldiner et al., 2008, Zhu et al., 2008, Barrio et al., 2007, Goold and Davis, 2007, Herrero et al., 2007, Li et al., 2007, Ramel et al., 2007, Shi et al., 2007, Ting et al., 2007, Xing et al., 2007, Dworkin and Gibson, 2006, Dworkin and Gibson., 2006, Serpe and O'Connor, 2006, Takaesu et al., 2006, Bunt and Hime, 2004, Stanyon et al., 2004, Yang et al., 2004)
        l(2)44Fd
        Secondary FlyBase IDs
        • FBgn0004835
        • FBgn0015469
        • FBgn0021802
        Datasets (0)
        Study focus (0)
        Experimental Role
        Project
        Project Type
        Title
        Study result (0)
        Result
        Result Type
        Title
        External Crossreferences and Linkouts ( 63 )
        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.
        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
        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
        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
        KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
        MIST (genetic) - An integrated Molecular Interaction Database
        MIST (protein-protein) - An integrated Molecular Interaction Database
        SignaLink - A signaling pathway resource with multi-layered regulatory networks.
        References (281)