The gene Connectin is referred to in FlyBase by the symbol Dmel\Con (CG7503, FBgn0005775). It is a protein_coding_gene from Drosophila melanogaster. Its molecular function is unknown. There is experimental evidence that it is involved in the biological process: homophilic cell adhesion. 16 alleles are reported. The phenotypes of these alleles are annotated with: organ system; ISN innervated muscle of A1-7; hypodermal muscle of larval abdomen; embryonic/larval neuron; abdominal 7 longitudinal muscle; hypodermal muscle of larval abdominal 2; abdominal 4 ventral oblique muscle 4; abdominal 7 ventral longitudinal muscle 2; abdominal 1 ventral oblique muscle 4; organ system subdivision. It has 2 annotated transcripts and 2 annotated polypeptides. Protein features are: Cysteine-rich flanking region, C-terminal; Leucine-rich repeat; Leucine-rich repeat, typical subtype. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of moderately high expression to a trough of very low expression. Peak expression observed within 06-18 hour embryonic stages. Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: adult brain. Expression at moderate levels in the following post-embryonic organs or tissues: larval/adult central nervous system. Comments on Affy2 ProbeSet: ProbeSet 1639913_at completely aligns to an exonic region of the only FlyBase-annotated transcript isoform of Con. Gene sequence location is 3L:4936758..5079033.
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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.
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. 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 becomes localized to the neuromuscular junction after innervation. In pros mutants, where innervation fails, expression occurs at the correct developmental stage and localization to a putative neuromuscular junction still occurs.
Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: adult brain. Expression at moderate levels in the following post-embryonic organs or tissues: larval/adult central nervous system.
[download data (TSV)]
Guide to FlyAtlas expression level colors
No expression (0 - 9.999)
Low expression (10 - 99.999)
Moderate expression (100 - 499.999)
High level expression (500 - 999.999)
Very high expression (>999.999)
Linear, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
297.3
Larval Midgut
4.3
Larval Hindgut
3.1
Larval Malpighian Tubules
5
Larval Fat Body
4.9
Larval Salivary Gland
4.1
Larval Trachea
3.775
Larval Carcass
6.45
Adult Head
96.3
Adult Eye
71.725
Adult Brain
512.3
Adult Thoracic-Abdominal Ganglion
333.8
Adult Crop
12.4
Adult Midgut
4.7
Adult Hindgut
10
Adult Malpighian Tubules
5.2
Adult Fat Body
19.5
Adult Salivary Gland
21.2
Adult Heart
6.55
Adult VirginFemale Spermatheca
8.7
Adult InseminatedFemale Spermatheca
13.9
Adult Ovary
2
Adult Testis
2.1
Adult Male Accessory Gland
8.2
Adult Carcass
5.9
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
297.3
Larval Midgut
4.3
Larval Hindgut
3.1
Larval Malpighian Tubules
5
Larval Fat Body
4.9
Larval Salivary Gland
4.1
Larval Trachea
3.775
Larval Carcass
6.45
Adult Head
96.3
Adult Eye
71.725
Adult Brain
512.3
Adult Thoracic-Abdominal Ganglion
333.8
Adult Crop
12.4
Adult Midgut
4.7
Adult Hindgut
10
Adult Malpighian Tubules
5.2
Adult Fat Body
19.5
Adult Salivary Gland
21.2
Adult Heart
6.55
Adult VirginFemale Spermatheca
8.7
Adult InseminatedFemale Spermatheca
13.9
Adult Ovary
2
Adult Testis
2.1
Adult Male Accessory Gland
8.2
Adult Carcass
5.9
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
297.3
Larval Midgut
4.3
Larval Hindgut
3.1
Larval Malpighian Tubules
5
Larval Fat Body
4.9
Larval Salivary Gland
4.1
Larval Trachea
3.775
Larval Carcass
6.45
Adult Head
96.3
Adult Eye
71.725
Adult Brain
512.3
Adult Thoracic-Abdominal Ganglion
333.8
Adult Crop
12.4
Adult Midgut
4.7
Adult Hindgut
10
Adult Malpighian Tubules
5.2
Adult Fat Body
19.5
Adult Salivary Gland
21.2
Adult Heart
6.55
Adult VirginFemale Spermatheca
8.7
Adult InseminatedFemale Spermatheca
13.9
Adult Ovary
2
Adult Testis
2.1
Adult Male Accessory Gland
8.2
Adult Carcass
5.9
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
297.3
Larval Midgut
4.3
Larval Hindgut
3.1
Larval Malpighian Tubules
5
Larval Fat Body
4.9
Larval Salivary Gland
4.1
Larval Trachea
3.775
Larval Carcass
6.45
Adult Head
96.3
Adult Eye
71.725
Adult Brain
512.3
Adult Thoracic-Abdominal Ganglion
333.8
Adult Crop
12.4
Adult Midgut
4.7
Adult Hindgut
10
Adult Malpighian Tubules
5.2
Adult Fat Body
19.5
Adult Salivary Gland
21.2
Adult Heart
6.55
Adult VirginFemale Spermatheca
8.7
Adult InseminatedFemale Spermatheca
13.9
Adult Ovary
2
Adult Testis
2.1
Adult Male Accessory Gland
8.2
Adult Carcass
5.9
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
297.3
Larval Midgut
4.3
Larval Hindgut
3.1
Larval Malpighian Tubules
5
Larval Fat Body
4.9
Larval Salivary Gland
4.1
Larval Trachea
3.775
Larval Carcass
6.45
Adult Head
96.3
Adult Eye
71.725
Adult Brain
512.3
Adult Thoracic-Abdominal Ganglion
333.8
Adult Crop
12.4
Adult Midgut
4.7
Adult Hindgut
10
Adult Malpighian Tubules
5.2
Adult Fat Body
19.5
Adult Salivary Gland
21.2
Adult Heart
6.55
Adult VirginFemale Spermatheca
8.7
Adult InseminatedFemale Spermatheca
13.9
Adult Ovary
2
Adult Testis
2.1
Adult Male Accessory Gland
8.2
Adult Carcass
5.9
Expression Level Scale
None
Low
Moderate
High
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
297.3
Larval Midgut
4.3
Larval Hindgut
3.1
Larval Malpighian Tubules
5
Larval Fat Body
4.9
Larval Salivary Gland
4.1
Larval Trachea
3.775
Larval Carcass
6.45
Adult Head
96.3
Adult Eye
71.725
Adult Brain
512.3
Adult Thoracic-Abdominal Ganglion
333.8
Adult Crop
12.4
Adult Midgut
4.7
Adult Hindgut
10
Adult Malpighian Tubules
5.2
Adult Fat Body
19.5
Adult Salivary Gland
21.2
Adult Heart
6.55
Adult VirginFemale Spermatheca
8.7
Adult InseminatedFemale Spermatheca
13.9
Adult Ovary
2
Adult Testis
2.1
Adult Male Accessory Gland
8.2
Adult Carcass
5.9
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
297.3
Larval Midgut
4.3
Larval Hindgut
3.1
Larval Malpighian Tubules
5
Larval Fat Body
4.9
Larval Salivary Gland
4.1
Larval Trachea
3.775
Larval Carcass
6.45
Adult Head
96.3
Adult Eye
71.725
Adult Brain
512.3
Adult Thoracic-Abdominal Ganglion
333.8
Adult Crop
12.4
Adult Midgut
4.7
Adult Hindgut
10
Adult Malpighian Tubules
5.2
Adult Fat Body
19.5
Adult Salivary Gland
21.2
Adult Heart
6.55
Adult VirginFemale Spermatheca
8.7
Adult InseminatedFemale Spermatheca
13.9
Adult Ovary
2
Adult Testis
2.1
Adult Male Accessory Gland
8.2
Adult Carcass
5.9
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
297.3
Larval Midgut
4.3
Larval Hindgut
3.1
Larval Malpighian Tubules
5
Larval Fat Body
4.9
Larval Salivary Gland
4.1
Larval Trachea
3.775
Larval Carcass
6.45
Adult Head
96.3
Adult Eye
71.725
Adult Brain
512.3
Adult Thoracic-Abdominal Ganglion
333.8
Adult Crop
12.4
Adult Midgut
4.7
Adult Hindgut
10
Adult Malpighian Tubules
5.2
Adult Fat Body
19.5
Adult Salivary Gland
21.2
Adult Heart
6.55
Adult VirginFemale Spermatheca
8.7
Adult InseminatedFemale Spermatheca
13.9
Adult Ovary
2
Adult Testis
2.1
Adult Male Accessory Gland
8.2
Adult Carcass
5.9
Expression Level Scale
None
Low
Moderate
High
Very high
Heatmap
Tissue
Expression Level
Larval Central Nervous System
Larval Midgut
Larval Hindgut
Larval Malpighian Tubules
Larval Fat Body
Larval Salivary Gland
Larval Trachea
Larval Carcass
Adult Head
Adult Eye
Adult Brain
Adult Thoracic-Abdominal Ganglion
Adult Crop
Adult Midgut
Adult Hindgut
Adult Malpighian Tubules
Adult Fat Body
Adult Salivary Gland
Adult Heart
Adult VirginFemale Spermatheca
Adult InseminatedFemale Spermatheca
Adult Ovary
Adult Testis
Adult Male Accessory Gland
Adult Carcass
FlyAtlas Organ/Tissue Expression, larval vs. adult
Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of moderately high expression to a trough of very low expression. Peak expression observed within 06-18 hour embryonic stages.
[download data (TSV)]
Please Note FlyBase no
longer curates genomic clone accessions so this list
may not be complete
cDNA Clones ( 343 )
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.
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.
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.
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.
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.
Antagonistic regulation of apoptosis and differentiation by the cut transcription factor represents a tumor-suppressing mechanism in Drosophila. [FBrf0217859]
Carrasco-Rando et al., 2011, PLoS Genet. 7(7): e1002186
Drosophila araucan and caupolican integrate intrinsic and signalling inputs for the acquisition by muscle progenitors of the lateral transverse fate. [FBrf0214635]
Takemura et al., 2011, Curr. Biol. 21(24): 2077--2084
Cholinergic circuits integrate neighboring visual signals in a Drosophila motion detection pathway. [FBrf0217052]