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General Information
Symbol
Dmel\Con
Species
D. melanogaster
Name
Connectin
Annotation Symbol
CG7503
Feature Type
FlyBase ID
FBgn0005775
Gene Model Status
Stock Availability
Gene Snapshot
Connectin (Con) encodes a transmembrane homophilic cell adhesion protein involved in axon guidance and target recognition. [Date last reviewed: 2019-03-07]
Also Known As

conn

Key Links
Genomic Location
Cytogenetic map
Sequence location
3L:4,936,758..5,079,033 [-]
Recombination map

3-13

RefSeq locus
NT_037436 REGION:4936758..5079033
Sequence
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
GO Summary Ribbons
Protein Family (UniProt)
-
Molecular Function (GO)
[Detailed GO annotations]
Experimental Evidence
-
Predictions / Assertions
-
Summaries
Protein Function (UniProtKB)
Cell adhesion protein involved in target recognition during neuromuscular development. Mediates homophilic cellular adhesion.
(UniProt, Q01819)
Summary (Interactive Fly)
Gene Model and Products
Number of Transcripts
2
Number of Unique Polypeptides
1

Please see the GBrowse view of Dmel\Con or the JBrowse view of Dmel\Con 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
Comments on Gene Model

Gene model reviewed during 5.41

Gene model reviewed during 5.45

Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0073375
3758
691
FBtr0309972
5588
691
Additional Transcript Data and Comments
Reported size (kB)

5 (northern blot)

5.0 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
RefSeq ID
GenBank
FBpp0073231
77.2
691
7.05
FBpp0301699
77.2
691
7.05
Polypeptides with Identical Sequences

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

691 aa isoforms: Con-PA, Con-PB
Additional Polypeptide Data and Comments
Reported size (kDa)

682 (aa); 72 (kD predicted)

682 (aa); 76 (kD)

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\Con using the Feature Mapper tool.

External Data
Crossreferences
Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
Linkouts
Gene Ontology (7 terms)
Molecular Function (0 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (0 terms)
Biological Process (3 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
Cellular Component (4 terms)
Terms Based on Experimental Evidence (3 terms)
CV Term
Evidence
References
inferred from direct assay
inferred from direct assay
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
traceable author statement
Expression Data
Expression Summary Ribbons
Colored tiles in ribbon indicate that expression data has been curated by FlyBase for that anatomical location. Colorless tiles indicate that there is no curated data for that location.
For complete stage-specific expression data, view the modENCODE Development RNA-Seq section under High-Throughput Expression below.
Transcript Expression
No Assay Recorded
Stage
Tissue/Position (including subcellular localization)
Reference
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Expression pattern inferred from unspecified enhancer trap line.

Con transcripts are first detected at stage 10 in a subset of the cells that will give rise to the visceral mesoderm. There is expression in the presumptive foregut and hindgut mesoderm and in a segmentally repeated subset of the presumptive midgut visceral mesoderm. At late stage 11, transcripts appear in the CNS and in the somatic mesoderm. The initial expression in the somatic mesoderm is strong in the thoracic segments and relatively weak in the abdominal segments. By stage 14, the intensity differences in staining of the somatic mesoderm have subsided by there are differences in the arrangement of staining cells in the thoracic and abdominal segments. In the CNS, the initially uniform staining is succeeded by a more modulated pattern. Differences appear by stage 14 and by stage 16, there is strong staining in the anterior CNS, including the brain lobes and the thoracic neuromeres but little labeling in the abdominal neuromeres. Labelling is also seen in gnathal sense organs.

Con is expressed on the surface of eight muscles, the motoneurons that innervate them, and several glial cells along the pathways leading to them. Expression is also observed in a subset of CNS neurons and in the visceral mesoderm.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
No Assay Recorded
Stage
Tissue/Position (including subcellular localization)
Reference
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Con is expressed on the surface of eight muscles, the motoneurons that innervate them, and several glial cells along the pathways leading to them. During synapse formation, Con protein localizes to the synaptic sites and afterwards it largely disappears. Expression is also observed in a subset of neurons and glia in the CNS, in the dorsal cluster of the PNS and in the visceral mesoderm.

Con protein is present along cell membranes and is thought to be attached to the membrane by a P1 anchor.

Marker for
 
Subcellular Localization
CV Term
Evidence
References
inferred from direct assay
inferred from direct assay
Expression Deduced from Reporters
Reporter: P{lacZCon.1-35}
Stage
Tissue/Position (including subcellular localization)
Reference
Reporter: P{lacZCon.1}
Stage
Tissue/Position (including subcellular localization)
Reference
Reporter: P{lacZCon.4-35}
Stage
Tissue/Position (including subcellular localization)
Reference
Reporter: P{lacZCon.4}
Stage
Tissue/Position (including subcellular localization)
Reference
High-Throughput Expression Data
Associated Tools

GBrowse - Visual display of RNA-Seq signals

View Dmel\Con in GBrowse 2
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
FLIGHT - Cell culture data for RNAi and other high-throughput technologies
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, and Transgenic Constructs
Classical and Insertion Alleles ( 14 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 10 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Con
Transgenic constructs containing regulatory region of Con
Deletions and Duplications ( 5 )
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 v7.1)
Homo sapiens (Human) (6)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
 
Model Organism Orthologs (via DIOPT v7.1)
Mus musculus (laboratory mouse) (7)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
Yes
Rattus norvegicus (Norway rat) (6)
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
Xenopus tropicalis (Western clawed frog) (8)
1 of 12
Yes
Yes
1 of 12
Yes
Yes
1 of 12
Yes
No
1 of 12
Yes
No
1 of 12
Yes
No
1 of 12
Yes
Yes
1 of 12
Yes
No
1 of 12
Yes
No
Danio rerio (Zebrafish) (15)
1 of 15
Yes
Yes
1 of 15
Yes
Yes
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
Yes
1 of 15
Yes
No
1 of 15
Yes
Yes
1 of 15
Yes
No
1 of 15
Yes
No
Caenorhabditis elegans (Nematode, roundworm) (7)
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
No
1 of 15
Yes
Yes
1 of 15
Yes
No
1 of 15
Yes
No
Arabidopsis thaliana (thale-cress) (0)
No records found.
Saccharomyces cerevisiae (Brewer's yeast) (0)
No records found.
Schizosaccharomyces pombe (Fission yeast) (0)
No records found.
Orthologs in Drosophila Species (via OrthoDB v9.1) ( EOG09190579 )
Organism
Common Name
Gene
AAA Syntenic Ortholog
Multiple Dmel Genes in this Orthologous Group
Drosophila melanogaster
fruit fly
Drosophila suzukii
Spotted wing Drosophila
Drosophila simulans
Drosophila sechellia
Drosophila erecta
Drosophila yakuba
Drosophila ananassae
Drosophila pseudoobscura pseudoobscura
Drosophila willistoni
Drosophila virilis
Drosophila mojavensis
Drosophila grimshawi
Orthologs in non-Drosophila Dipterans (via OrthoDB v9.1) ( EOG091503U9 )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Musca domestica
House fly
Glossina morsitans
Tsetse fly
Lucilia cuprina
Australian sheep blowfly
Mayetiola destructor
Hessian fly
Aedes aegypti
Yellow fever mosquito
Aedes aegypti
Yellow fever mosquito
Anopheles darlingi
American malaria mosquito
Anopheles darlingi
American malaria mosquito
Anopheles gambiae
Malaria mosquito
Anopheles gambiae
Malaria mosquito
Culex quinquefasciatus
Southern house mosquito
Culex quinquefasciatus
Southern house mosquito
Orthologs in non-Dipteran Insects (via OrthoDB v9.1) ( None identified )
No non-Dipteran orthologies identified
Orthologs in non-Insect Arthropods (via OrthoDB v9.1) ( None identified )
No non-Insect Arthropod orthologies identified
Orthologs in non-Arthropod Metazoa (via OrthoDB v9.1) ( None identified )
No non-Arthropod Metazoa orthologies identified
Paralogs
Paralogs (via DIOPT v7.1)
Drosophila melanogaster (Fruit fly) (37)
3 of 10
3 of 10
3 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
2 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
1 of 10
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Model Summary Ribbon
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Interaction
    References
    Disease Associations of Human Orthologs (via DIOPT v7.1 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
    esyN Network Diagram
    Show neighbor-neighbor interactions:
    Select Layout:
    Legend:
    Protein
    RNA
    Selected Interactor(s)
    Interactions Browser

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    esyN Network Diagram
    esyN Network Key:
    Suppression
    Enhancement

    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.
    InterologFinder - Protein-protein interactions (PPI) from both known and predicted PPI data sets.
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    External Data
    Linkouts
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3L
    Recombination map

    3-13

    Cytogenetic map
    Sequence location
    3L:4,936,758..5,079,033 [-]
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    64C2-64C5
    Limits computationally determined from genome sequence between P{PZ}l(3)rG166rG166 and P{PZ}sinu06524
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    64C3-64C5
    (determined by in situ hybridisation)
    64C-64C
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (15)
    Genomic Clones (74)
    cDNA Clones (375)
     

    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 GBrowse for alignment of the cDNAs and ESTs to the gene model.

    cDNA clones, fully sequences
    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)
    Other clones
    RNAi and Array Information
    Linkouts
    DRSC - Results frm RNAi screens
    GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
    Antibody Information
    Laboratory Generated Antibodies
     

    polyclonal

    Commercially Available Antibodies
     
    Developmental Studies Hybridoma Bank - Monoclonal antibodies for use in research
    Other Information
    Relationship to Other Genes
    Source for database identify of
    Source for database merge of
    Additional comments
    Other Comments

    Ectopic expression of Con in all muscles causes SNa motorneurons to often inappropriately innervate a neighbouring non-target muscle that ectopically expresses Con. The ectopic synapse formation is dependent on the endogenous Con expression on the SNa motoneurons. Results show that Con can function as an attractive and homophilic target recognition molecule in vivo. Con has a specific function during SNb pathfinding.

    The pattern of expression of Con protein during embryogenesis has been analysed.

    Con functions as a repulsive signal for SNb growth cones in vivo, Con has a specific and robust repulsive function during motoneuron growth cone guidance and synapse formation.

    In pros mutants, where innervation of muscles fails, connectin is expressed on muscle surface begins in same developmental pattern as in wild type.

    Con gene product plays a role in neuromuscular connectivity.

    A chromatin immunopurification approach isolated the Connectin gene as a binding site for Ubx in vivo. The product is predicted to be a cell surface molecule containing leucine rich repeats and can mediate cell-cell adhesion.

    Con is a novel cell adhesion molecule whose expression suggests a role in target recognition.

    The genes encoding the 35 and 48 transcripts, Con and T48 respectively, are good candidates for the target genes directly regulated by the homeotic gene Ubx.

    Cloned as a potential Ubx target gene.

    Origin and Etymology
    Discoverer
    Etymology
    Identification
    External Crossreferences and Linkouts ( 42 )
    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/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
    Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
    Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
    Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
    Flygut - An atlas of the Drosophila adult midgut
    GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
    KEGG Genes - Molecular building blocks of life in the genomic space.
    modMine - A data warehouse for the modENCODE project
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    DroID - A comprehensive database of gene and protein interactions.
    DRSC - Results frm RNAi screens
    Developmental Studies Hybridoma Bank - Monoclonal antibodies for use in research
    FLIGHT - Cell culture data for RNAi and other high-throughput technologies
    FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
    FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
    FlyMine - An integrated database for Drosophila genomics
    Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
    InterologFinder - Protein-protein interactions (PPI) from both known and predicted PPI data sets.
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Synonyms and Secondary IDs (11)
    Datasets (0)
    Study focus (0)
    Experimental Role
    Project
    Project Type
    Title
    References (155)