The gene Ras opposite is referred to in FlyBase by the symbol Dmel\Rop (CG15811, FBgn0004574). It is a protein_coding_gene from Drosophila melanogaster. Based on sequence similarity, it is predicted to have molecular function: SNARE binding. There is experimental evidence that it is involved in the biological process: synaptic transmission; response to light stimulus; neurotransmitter secretion; cytokinesis; regulation of pole plasm oskar mRNA localization; secretion by cell. 24 alleles are reported. The phenotypes of these alleles are annotated with: tracheal branch primordium; embryonic/first instar larval cuticle; central nervous system. It has 2 annotated transcripts and 2 annotated polypeptides. Protein features are: Sec1-like protein. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of high expression to a trough of moderately high expression. Peak expression observed at stages throughout embryogenesis, at stages throughout the larval period, at stages throughout the pupal period, in stages of adults of both sexes. Summary of FlyAtlas Anatomical Expression Data: Nearly all larval and adult tissues/organs expressed at moderate levels. Expression at high levels in the following post-embryonic organs or tissues: adult central nervous system. Expression at moderate levels in the following post-embryonic organs or tissues: adult head, adult eye, larval central nervous system, adult crop, larval/adult midgut, larval/adult hindgut, larval/adult Malpighian tubules, adult heart, larval fat body, larval/adult salivary gland, larval trachea, adult female reproductive system, adult male reproductive system, larval/adult carcass. Comments on Affy2 ProbeSet: ProbeSet 1627197_at completely aligns to an exonic region of the only FlyBase-annotated transcript isoform of Rop. Gene sequence location is 3L:4136359..4138996.
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Rop transcripts are expressed in the garland cells starting in stage 13 of embryogenesis. They are also observed in the CNS, the PNS, and the antenno-maxillary complex. The pattern is very similar to that of Ras64B. The probe used does not distinguish between the two transcripts.
Rop protein is detected throughout the embryo at low levels until stage 13, after which is appears at higher levels in some tissues. These include the epidermis, garland cells, gut, Malpighian tubules, salivary glands, and eventually in the axon tracts of the CNS and in the segmental and intersegmental nerves. In third instar larvae, Rop protein is found at high levels in the neuropil of the CNS, in the axon bundles and in their synapse rich termini (boutons). It is most abundant in the periphery of the boutons. Rop protein is observed at lower levels in the imaginal discs and muscles.
Summary of FlyAtlas Anatomical Expression Data: Nearly all larval and adult tissues/organs expressed at moderate levels. Expression at high levels in the following post-embryonic organs or tissues: adult central nervous system. Expression at moderate levels in the following post-embryonic organs or tissues: adult head, adult eye, larval central nervous system, adult crop, larval/adult midgut, larval/adult hindgut, larval/adult Malpighian tubules, adult heart, larval fat body, larval/adult salivary gland, larval trachea, adult female reproductive system, adult male reproductive system, larval/adult carcass.
[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
221.825
Larval Midgut
202.2
Larval Hindgut
307.7
Larval Malpighian Tubules
400.7
Larval Fat Body
127.8
Larval Salivary Gland
321.2
Larval Trachea
169.475
Larval Carcass
160.85
Adult Head
338.3
Adult Eye
370.575
Adult Brain
750
Adult Thoracic-Abdominal Ganglion
879.6
Adult Crop
173.1
Adult Midgut
257.7
Adult Hindgut
257.6
Adult Malpighian Tubules
292.5
Adult Fat Body
91.3
Adult Salivary Gland
202.4
Adult Heart
197.55
Adult VirginFemale Spermatheca
179.4
Adult InseminatedFemale Spermatheca
191.6
Adult Ovary
147.5
Adult Testis
104.7
Adult Male Accessory Gland
107
Adult Carcass
124.2
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
221.825
Larval Midgut
202.2
Larval Hindgut
307.7
Larval Malpighian Tubules
400.7
Larval Fat Body
127.8
Larval Salivary Gland
321.2
Larval Trachea
169.475
Larval Carcass
160.85
Adult Head
338.3
Adult Eye
370.575
Adult Brain
(750)
Adult Thoracic-Abdominal Ganglion
(879.6)
Adult Crop
173.1
Adult Midgut
257.7
Adult Hindgut
257.6
Adult Malpighian Tubules
292.5
Adult Fat Body
91.3
Adult Salivary Gland
202.4
Adult Heart
197.55
Adult VirginFemale Spermatheca
179.4
Adult InseminatedFemale Spermatheca
191.6
Adult Ovary
147.5
Adult Testis
104.7
Adult Male Accessory Gland
107
Adult Carcass
124.2
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
221.825
Larval Midgut
202.2
Larval Hindgut
307.7
Larval Malpighian Tubules
400.7
Larval Fat Body
127.8
Larval Salivary Gland
321.2
Larval Trachea
169.475
Larval Carcass
160.85
Adult Head
338.3
Adult Eye
370.575
Adult Brain
750
Adult Thoracic-Abdominal Ganglion
879.6
Adult Crop
173.1
Adult Midgut
257.7
Adult Hindgut
257.6
Adult Malpighian Tubules
292.5
Adult Fat Body
91.3
Adult Salivary Gland
202.4
Adult Heart
197.55
Adult VirginFemale Spermatheca
179.4
Adult InseminatedFemale Spermatheca
191.6
Adult Ovary
147.5
Adult Testis
104.7
Adult Male Accessory Gland
107
Adult Carcass
124.2
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
221.825
Larval Midgut
202.2
Larval Hindgut
307.7
Larval Malpighian Tubules
400.7
Larval Fat Body
127.8
Larval Salivary Gland
321.2
Larval Trachea
169.475
Larval Carcass
160.85
Adult Head
338.3
Adult Eye
370.575
Adult Brain
750
Adult Thoracic-Abdominal Ganglion
879.6
Adult Crop
173.1
Adult Midgut
257.7
Adult Hindgut
257.6
Adult Malpighian Tubules
292.5
Adult Fat Body
91.3
Adult Salivary Gland
202.4
Adult Heart
197.55
Adult VirginFemale Spermatheca
179.4
Adult InseminatedFemale Spermatheca
191.6
Adult Ovary
147.5
Adult Testis
104.7
Adult Male Accessory Gland
107
Adult Carcass
124.2
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
221.825
Larval Midgut
202.2
Larval Hindgut
307.7
Larval Malpighian Tubules
400.7
Larval Fat Body
127.8
Larval Salivary Gland
321.2
Larval Trachea
169.475
Larval Carcass
160.85
Adult Head
338.3
Adult Eye
370.575
Adult Brain
750
Adult Thoracic-Abdominal Ganglion
879.6
Adult Crop
173.1
Adult Midgut
257.7
Adult Hindgut
257.6
Adult Malpighian Tubules
292.5
Adult Fat Body
91.3
Adult Salivary Gland
202.4
Adult Heart
197.55
Adult VirginFemale Spermatheca
179.4
Adult InseminatedFemale Spermatheca
191.6
Adult Ovary
147.5
Adult Testis
104.7
Adult Male Accessory Gland
107
Adult Carcass
124.2
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
221.825
Larval Midgut
202.2
Larval Hindgut
307.7
Larval Malpighian Tubules
400.7
Larval Fat Body
127.8
Larval Salivary Gland
321.2
Larval Trachea
169.475
Larval Carcass
160.85
Adult Head
338.3
Adult Eye
370.575
Adult Brain
750
Adult Thoracic-Abdominal Ganglion
(879.6)
Adult Crop
173.1
Adult Midgut
257.7
Adult Hindgut
257.6
Adult Malpighian Tubules
292.5
Adult Fat Body
91.3
Adult Salivary Gland
202.4
Adult Heart
197.55
Adult VirginFemale Spermatheca
179.4
Adult InseminatedFemale Spermatheca
191.6
Adult Ovary
147.5
Adult Testis
104.7
Adult Male Accessory Gland
107
Adult Carcass
124.2
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
221.825
Larval Midgut
202.2
Larval Hindgut
307.7
Larval Malpighian Tubules
400.7
Larval Fat Body
127.8
Larval Salivary Gland
321.2
Larval Trachea
169.475
Larval Carcass
160.85
Adult Head
338.3
Adult Eye
370.575
Adult Brain
750
Adult Thoracic-Abdominal Ganglion
879.6
Adult Crop
173.1
Adult Midgut
257.7
Adult Hindgut
257.6
Adult Malpighian Tubules
292.5
Adult Fat Body
91.3
Adult Salivary Gland
202.4
Adult Heart
197.55
Adult VirginFemale Spermatheca
179.4
Adult InseminatedFemale Spermatheca
191.6
Adult Ovary
147.5
Adult Testis
104.7
Adult Male Accessory Gland
107
Adult Carcass
124.2
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
221.825
Larval Midgut
202.2
Larval Hindgut
307.7
Larval Malpighian Tubules
400.7
Larval Fat Body
127.8
Larval Salivary Gland
321.2
Larval Trachea
169.475
Larval Carcass
160.85
Adult Head
338.3
Adult Eye
370.575
Adult Brain
750
Adult Thoracic-Abdominal Ganglion
879.6
Adult Crop
173.1
Adult Midgut
257.7
Adult Hindgut
257.6
Adult Malpighian Tubules
292.5
Adult Fat Body
91.3
Adult Salivary Gland
202.4
Adult Heart
197.55
Adult VirginFemale Spermatheca
179.4
Adult InseminatedFemale Spermatheca
191.6
Adult Ovary
147.5
Adult Testis
104.7
Adult Male Accessory Gland
107
Adult Carcass
124.2
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 high expression to a trough of moderately high expression. Peak expression observed at stages throughout embryogenesis, at stages throughout the larval period, at stages throughout the pupal period, in stages of adults of both sexes.
[download data (TSV)]
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may not be complete
cDNA Clones ( 146 )
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.
The Rop protein plays a negative role in neurotransmitter release, in addition to its previously identified positive function possible by modulation of docking of synaptic vesicles or activation of a pre-fusion complex at the active zone.
Loss of Rop blocks the extracellular accumulation of secreted products and temperature sensitive Rop mutations disrupt synaptic transmission in adults. Rop mutant clones fail to develop.
Ras64B/Rop bidirectional promoter supports the transcription of both genes. Mobility shift assays indicate the binding of a single major protein complex to the Ras64B/Rop promoter.
A 3-5 fold induction of Rop protein in third instar larvae causes a dramatic decrease in neurotransmitter release. The number of spontaneous vesicle fusions is reduced by more than 50%, though calcium dependence of neurotransmitter release is not significantly altered.
Rop plays a negative role in neurotransmitter release in vivo possibly by modulating the docking of synaptic vesicles or activation of a pre-fusion complex at the active zone.
Rop is divergently transcribed from Ras64B, and the two transcription units are only 93 bases apart. Based on sequence similarities with related interacting proteins in yeast, it is suggested that Rop and Ras64B gene products are not simply coexpressed, but may interact with each other.
Munoz-Soriano et al., 2012, J. Mol. Neurosci. 48(1): 136--143
Septin 4, the Drosophila Ortholog of Human CDCrel-1, Accumulates in parkin Mutant Brains and is Functionally Related to the Nedd4 E3 Ubiquitin Ligase. [FBrf0219099]
Palgi et al., 2012, BMC Genomics 13: 134
Gene expression analysis of Drosophilaa Manf mutants reveals perturbations in membrane traffic and major metabolic changes. [FBrf0218515]
Koppen et al., 2011, Proteomics 11(22): 4397--4410
Proteomics analyses of microvesicles released by Drosophila Kc167 and S2 cells. [FBrf0216610]