The gene G protein β-subunit 76C is referred to in FlyBase by the symbol Dmel\Gβ76C (CG8770, FBgn0004623). It is a protein_coding_gene from Drosophila melanogaster. There is experimental evidence that it has the molecular function: protein heterodimerization activity; GTPase activity. There is experimental evidence that it is involved in the biological process: rhodopsin mediated signaling pathway; activation of phospholipase C activity; phototransduction; deactivation of rhodopsin mediated signaling. 7 alleles are reported. The phenotype of these alleles is annotated with: photoreceptor cell. It has one annotated transcript and one annotated polypeptide. Protein features are: G-protein beta WD-40 repeat; G-protein, beta subunit; Guanine nucleotide-binding protein, beta subunit; WD40 repeat; WD40 repeat, conserved site; WD40-repeat-containing domain; WD40/YVTN repeat-like-containing domain. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of very high expression to a trough of extremely low expression. Peak expression observed during late pupal stages, in adult male stages. Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: adult head, adult eye. Expression at moderate levels in the following post-embryonic organs or tissues: adult brain. Comments on Affy2 ProbeSet: ProbeSet 1624519_at completely aligns to an exonic region of the only FlyBase-annotated transcript isoform of Gbeta76C. Gene sequence location is 3L:19680737..19683092.
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Gβ76C protein, Gα49B protein, and Gγ30A protein are all expressed in the same pattern supporting the hypothesis that Gγ30A is part of a heterotrimeric eye-specific G protein.
A monoclonal antibody generated against Gβ13F protein also recognizes Gβ76C protein. The antibody stains the brain neuropil and cortex, the eye, and the thoracic ganglion; the eye-specific staining is due to Gβ76C protein.
Gβ76C protein is localized to the photoreceptor cells of the retina. It is also detected in the lamina and the medulla, presumably in axons of the photoreceptor cells that project to these optic ganglia.
Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: adult head, adult eye. Expression at moderate levels in the following post-embryonic organs or tissues: adult brain.
[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
4.025
Larval Midgut
10.3
Larval Hindgut
9
Larval Malpighian Tubules
11.6
Larval Fat Body
10.2
Larval Salivary Gland
5.2
Larval Trachea
336.95
Larval Carcass
12.15
Adult Head
3759.1
Adult Eye
8830
Adult Brain
151.6
Adult Thoracic-Abdominal Ganglion
8
Adult Crop
10.3
Adult Midgut
15.8
Adult Hindgut
12.1
Adult Malpighian Tubules
9.7
Adult Fat Body
11.1
Adult Salivary Gland
6.8
Adult Heart
15.525
Adult VirginFemale Spermatheca
9.3
Adult InseminatedFemale Spermatheca
12.4
Adult Ovary
7.5
Adult Testis
8.8
Adult Male Accessory Gland
6
Adult Carcass
9.9
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
4.025
Larval Midgut
10.3
Larval Hindgut
9
Larval Malpighian Tubules
11.6
Larval Fat Body
10.2
Larval Salivary Gland
5.2
Larval Trachea
336.95
Larval Carcass
12.15
Adult Head
(3759.1)
Adult Eye
(8830)
Adult Brain
151.6
Adult Thoracic-Abdominal Ganglion
8
Adult Crop
10.3
Adult Midgut
15.8
Adult Hindgut
12.1
Adult Malpighian Tubules
9.7
Adult Fat Body
11.1
Adult Salivary Gland
6.8
Adult Heart
15.525
Adult VirginFemale Spermatheca
9.3
Adult InseminatedFemale Spermatheca
12.4
Adult Ovary
7.5
Adult Testis
8.8
Adult Male Accessory Gland
6
Adult Carcass
9.9
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
4.025
Larval Midgut
10.3
Larval Hindgut
9
Larval Malpighian Tubules
11.6
Larval Fat Body
10.2
Larval Salivary Gland
5.2
Larval Trachea
336.95
Larval Carcass
12.15
Adult Head
(3759.1)
Adult Eye
(8830)
Adult Brain
151.6
Adult Thoracic-Abdominal Ganglion
8
Adult Crop
10.3
Adult Midgut
15.8
Adult Hindgut
12.1
Adult Malpighian Tubules
9.7
Adult Fat Body
11.1
Adult Salivary Gland
6.8
Adult Heart
15.525
Adult VirginFemale Spermatheca
9.3
Adult InseminatedFemale Spermatheca
12.4
Adult Ovary
7.5
Adult Testis
8.8
Adult Male Accessory Gland
6
Adult Carcass
9.9
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
4.025
Larval Midgut
10.3
Larval Hindgut
9
Larval Malpighian Tubules
11.6
Larval Fat Body
10.2
Larval Salivary Gland
5.2
Larval Trachea
336.95
Larval Carcass
12.15
Adult Head
3759.1
Adult Eye
8830
Adult Brain
151.6
Adult Thoracic-Abdominal Ganglion
8
Adult Crop
10.3
Adult Midgut
15.8
Adult Hindgut
12.1
Adult Malpighian Tubules
9.7
Adult Fat Body
11.1
Adult Salivary Gland
6.8
Adult Heart
15.525
Adult VirginFemale Spermatheca
9.3
Adult InseminatedFemale Spermatheca
12.4
Adult Ovary
7.5
Adult Testis
8.8
Adult Male Accessory Gland
6
Adult Carcass
9.9
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
4.025
Larval Midgut
10.3
Larval Hindgut
9
Larval Malpighian Tubules
11.6
Larval Fat Body
10.2
Larval Salivary Gland
5.2
Larval Trachea
336.95
Larval Carcass
12.15
Adult Head
3759.1
Adult Eye
8830
Adult Brain
151.6
Adult Thoracic-Abdominal Ganglion
8
Adult Crop
10.3
Adult Midgut
15.8
Adult Hindgut
12.1
Adult Malpighian Tubules
9.7
Adult Fat Body
11.1
Adult Salivary Gland
6.8
Adult Heart
15.525
Adult VirginFemale Spermatheca
9.3
Adult InseminatedFemale Spermatheca
12.4
Adult Ovary
7.5
Adult Testis
8.8
Adult Male Accessory Gland
6
Adult Carcass
9.9
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
4.025
Larval Midgut
10.3
Larval Hindgut
9
Larval Malpighian Tubules
11.6
Larval Fat Body
10.2
Larval Salivary Gland
5.2
Larval Trachea
336.95
Larval Carcass
12.15
Adult Head
(3759.1)
Adult Eye
(8830)
Adult Brain
151.6
Adult Thoracic-Abdominal Ganglion
8
Adult Crop
10.3
Adult Midgut
15.8
Adult Hindgut
12.1
Adult Malpighian Tubules
9.7
Adult Fat Body
11.1
Adult Salivary Gland
6.8
Adult Heart
15.525
Adult VirginFemale Spermatheca
9.3
Adult InseminatedFemale Spermatheca
12.4
Adult Ovary
7.5
Adult Testis
8.8
Adult Male Accessory Gland
6
Adult Carcass
9.9
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
4.025
Larval Midgut
10.3
Larval Hindgut
9
Larval Malpighian Tubules
11.6
Larval Fat Body
10.2
Larval Salivary Gland
5.2
Larval Trachea
336.95
Larval Carcass
12.15
Adult Head
(3759.1)
Adult Eye
(8830)
Adult Brain
151.6
Adult Thoracic-Abdominal Ganglion
8
Adult Crop
10.3
Adult Midgut
15.8
Adult Hindgut
12.1
Adult Malpighian Tubules
9.7
Adult Fat Body
11.1
Adult Salivary Gland
6.8
Adult Heart
15.525
Adult VirginFemale Spermatheca
9.3
Adult InseminatedFemale Spermatheca
12.4
Adult Ovary
7.5
Adult Testis
8.8
Adult Male Accessory Gland
6
Adult Carcass
9.9
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
4.025
Larval Midgut
10.3
Larval Hindgut
9
Larval Malpighian Tubules
11.6
Larval Fat Body
10.2
Larval Salivary Gland
5.2
Larval Trachea
336.95
Larval Carcass
12.15
Adult Head
3759.1
Adult Eye
8830
Adult Brain
151.6
Adult Thoracic-Abdominal Ganglion
8
Adult Crop
10.3
Adult Midgut
15.8
Adult Hindgut
12.1
Adult Malpighian Tubules
9.7
Adult Fat Body
11.1
Adult Salivary Gland
6.8
Adult Heart
15.525
Adult VirginFemale Spermatheca
9.3
Adult InseminatedFemale Spermatheca
12.4
Adult Ovary
7.5
Adult Testis
8.8
Adult Male Accessory Gland
6
Adult Carcass
9.9
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 very high expression to a trough of extremely low expression. Peak expression observed during late pupal stages, in adult male stages.
[download data (TSV)]
Please Note FlyBase no
longer curates genomic clone accessions so this list
may not be complete
cDNA Clones ( 49 )
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.
dsRNA made from templates generated with primers against this gene tested in a cl-8 cell reporter assay to examine any role of Gβ76C in the hh signalling pathway.
Gβ76C is an eye specific G-protein β subunit which is essential for G-protein-receptor coupling in vivo. Mutants are also severely defective in the deactivation of the light response demonstrating an essential role for the Gβ76C subunit in terminating the active state of the signalling cascade.
An in situ 35S-labelled guanosine 5'-3-0-(thio)triphosphate (35S GTPγS) binding procedure can assay light stimulated G protein activity in eyes. Results demonstrate Gβ76C functions as the β subunit of a heterotrimeric G protein that couples photoactivation of rhodopsin to downstream components in the phototransduction cascade.