FB2025_05 , released December 11, 2025
Gene: Dmel\Rh5
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General Information
Symbol
Dmel\Rh5
Species
D. melanogaster
Name
Rhodopsin 5
Annotation Symbol
CG5279
Feature Type
FlyBase ID
FBgn0014019
Gene Model Status
Stock Availability
Gene Summary
Rhodopsin 5 (Rh5) encodes a visual GPCR opsin that covalently binds the chromophore retinal. A photon of light stimulates the isomerization of retinal resulting in a conformational change in the product of Rh5 and signal activation. Its peak sensitivity is in the blue and it is expressed in a subclass of R8 photoreceptors. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

rhodopsin

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-45
RefSeq locus
NT_033779 REGION:12008153..12009832
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (15 terms)
Molecular Function (2 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN008398221
non-traceable author statement
inferred from sequence or structural similarity with FLYBASE:Rh3; FB:FBgn0003249
inferred from sequence or structural similarity with FLYBASE:Rh4; FB:FBgn0003250
inferred from sequence or structural similarity with FLYBASE:ninaE; FB:FBgn0002940
Biological Process (10 terms)
Terms Based on Experimental Evidence (6 terms)
CV Term
Evidence
References
inferred from mutant phenotype
involved_in phototransduction
inferred from genetic interaction with FLYBASE:ninaE; FB:FBgn0002940
inferred from direct assay
inferred from mutant phenotype
involved_in thermotaxis
inferred from mutant phenotype
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN008398221
involved_in phototransduction
non-traceable author statement
inferred from sequence or structural similarity with FLYBASE:Rh3; FB:FBgn0003249
inferred from sequence or structural similarity with FLYBASE:Rh4; FB:FBgn0003250
inferred from sequence or structural similarity with FLYBASE:ninaE; FB:FBgn0002940
inferred from biological aspect of ancestor with PANTHER:PTN008398221
non-traceable author statement
involved_in visual perception
inferred from electronic annotation with InterPro:IPR001760
Cellular Component (3 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
is_active_in rhabdomere
inferred from direct assay
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
is_active_in membrane
inferred from sequence or structural similarity with FLYBASE:ninaE; FB:FBgn0002940
inferred from sequence or structural similarity with FLYBASE:Rh3; FB:FBgn0003249
inferred from sequence or structural similarity with FLYBASE:Rh4; FB:FBgn0003250
is_active_in plasma membrane
inferred from biological aspect of ancestor with PANTHER:PTN008398221
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the G-protein coupled receptor 1 family. Opsin subfamily. (P91657)
Summaries
Gene Snapshot
Rhodopsin 5 (Rh5) encodes a visual GPCR opsin that covalently binds the chromophore retinal. A photon of light stimulates the isomerization of retinal resulting in a conformational change in the product of Rh5 and signal activation. Its peak sensitivity is in the blue and it is expressed in a subclass of R8 photoreceptors. [Date last reviewed: 2019-03-14]
Gene Group (FlyBase)
RHODOPSINS -
Rhodopsins, visual photoreceptors, are Class A GPCRs composed of the seven transmembrane protein (opsin) covalently linked to the chromophore retinal. A photon of light stimulates the isomerization of retinal resulting in a conformational change in opsin and activation of an intracellular heterotrimeric G protein. Different rhodopsins are activated at different peak wavelengths. (Adapted from FBrf0218480 & FBrf0217353).
Protein Function (UniProtKB)
Visual pigments are the light-absorbing molecules that mediate vision. They consist of an apoprotein, opsin, covalently linked to cis-retinal.
(UniProt, P91657)
Gene Model and Products
Number of Transcripts
2
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Rh5 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 P91657)

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

Gene model reviewed during 5.51

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0080291
1347
382
FBtr0342591
1572
382
Additional Transcript Data and Comments
Reported size (kB)

1.4 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0079875
42.7
382
7.83
FBpp0309539
42.7
382
7.83
Polypeptides with Identical Sequences

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

382 aa isoforms: Rh5-PA, Rh5-PB
Additional Polypeptide Data and Comments
Reported size (kDa)

382 (aa); 43 (kD predicted)

Comments
External Data
Post Translational Modification

Phosphorylated on some or all of the serine and threonine residues present in the C-terminal region.

(UniProt, P91657)
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\Rh5 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).

-0.40

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
Additional Descriptive Data

Eye-enriched transcripts determined by ratio of expression level in wild-type heads. versus expression level in so heads.

Rh5 is expressed in a subset of R8 photoreceptor cells. It is specifically expressed in R8 cells underlying Rh3-expressing R7 cells but never under Rh4-expressing R7 cells.

Rh5 transcripts are detected in RNA from adult heads but not bodies on northern blots.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Rh5 is expressed in 29% of R8 cells.

Rh5 begins to be expressed in larval photoreceptors at embryonic 16,17 and expression continues throughout the larval stages. Rh5 is expressed in 3-4 of the larval photoreceptors and the remaining photoreceptors express Rh6.

Rh5 expression is limited to a subset of the R8 photoreceptor cells. It was known previously that Rh3 is expressed in a subset of R7 photoreceptors cells. It was found here that there is a precise pairing of Rh3 and Rh5 expression within the R7 and R8 cells of individual ommatidia.

Marker for
Subcellular Localization
CV Term
Evidence
References
is_active_in rhabdomere
inferred from direct assay
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Rh5 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
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 9 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 19 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Rh5
Transgenic constructs containing regulatory region of Rh5
Aberrations (Deficiencies and Duplications) ( 1 )
Inferred from experimentation ( 1 )
Inferred from location ( 7 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (89)
5 of 14
Yes
No
1  
2 of 14
No
No
2  
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2  
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
2  
1 of 14
No
No
1  
1 of 14
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1 of 14
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1  
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1 of 14
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Yes
1  
1 of 14
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1 of 14
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Yes
1 of 14
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No
2  
1 of 14
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No
8  
1 of 14
No
No
1 of 14
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Yes
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1  
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1  
1 of 14
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1 of 14
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No
1 of 14
No
Yes
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (39)
5 of 14
Yes
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
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1 of 14
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Yes
1 of 14
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No
1 of 14
No
No
Mus musculus (laboratory mouse) (38)
5 of 14
Yes
No
1  
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
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Yes
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No
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No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (79)
2 of 13
Yes
No
2 of 13
Yes
No
2 of 13
Yes
No
2 of 13
Yes
No
2 of 13
Yes
No
2 of 13
Yes
No
2 of 13
Yes
No
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Yes
No
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Yes
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No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Danio rerio (Zebrafish) (185)
5 of 14
Yes
No
5 of 14
Yes
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
2 of 14
No
No
2 of 14
No
No
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No
No
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No
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Yes
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Yes
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Yes
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Yes
2 of 14
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Yes
2 of 14
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Yes
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Yes
2 of 14
No
Yes
1 of 14
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No
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Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (25)
1 of 14
Yes
No
1 of 14
Yes
No
1 of 14
Yes
No
1 of 14
Yes
No
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No
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No
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No
1 of 14
Yes
No
Anopheles gambiae (African malaria mosquito) (37)
12 of 12
Yes
Yes
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
1 of 12
No
No
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No
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No
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No
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No
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No
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No
No
1 of 12
No
No
1 of 12
No
No
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No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
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No
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No
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No
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Yes
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No
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No
No
Arabidopsis thaliana (thale-cress) (0)
Saccharomyces cerevisiae (Brewer's yeast) (0)
Schizosaccharomyces pombe (Fission yeast) (0)
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Rh5. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (32)
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Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 1 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 1 )
    Allele
    Disease
    Interaction
    References
    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.
    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
    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
    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
    Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2L
    Recombination map
    2-45
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    33B8-33B8
    Limits computationally determined from genome sequence between P{EP}MESK1EP980 and P{PZ}l(2)0181001810&P{EP}CG6785EP340
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    33B1-33B14
    33B5-33B6
    33B-33B
    (determined by in situ hybridisation)
    33B5-33B6
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (11)
    Genomic Clones (15)
     

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

    cDNA Clones (35)
     

    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)
    RNAi and Array Information
    Linkouts
    DRSC - Results frm RNAi screens
    Antibody Information
    Laboratory Generated Antibodies
     

    polyclonal

    Commercially Available Antibodies
     
    Cell Line Information
    Publicly Available Cell Lines
     
      Other Stable Cell Lines
       
        Other Comments

        Rh5 is required in TrpA1-expressing neurons (located in the brain, ventral nerve cord and body well) for the normal thermal preference for 18[o]C seen in late third-instar larvae exposed to a temperature gradient.

        dsRNA made from templates generated with primers directed against this gene used in a cell-based RNAi assay to identify components or modifiers of the JAK/STAT pathway.

        Shows particularly robust cycling of transcription in adult heads, as assessed by expression analysis using high density oligonucleotide arrays with probe generated during three 12-point time course experiments over the course of 6 days.

        Rh5, a rhodopsin expressed in a subset of R8 photoreceptor cells, has been cloned and characterised.

        Rh5 encodes a functional opsin (restores the light response in ninaE mutants) that is expressed in a subset of R8 photoreceptor cells.

        The Rh5 gene encodes a functional opsin, as demonstrated by electroretinogram analysis of ninaE mutant flies transformed with the Rh5 cDNA, under the control of the ninaE promoter.

        Relationship to Other Genes
        Source for database merge of
        Additional comments
        Nomenclature History
        Source for database identify of

        Source for identity of: Rh5 CG5279

        Nomenclature comments
        Etymology
        Synonyms and Secondary IDs (14)
        Reported As
        Symbol Synonym
        Rh5
        (Damulewicz and Mazzotta, 2025, McLamb et al., 2025, Lim-Kian-Siang et al., 2024, Bossen et al., 2023, Currier et al., 2023, Xiao et al., 2023, National Institute of Genetics Fly Stocks, 2022-, Ryu et al., 2022, Sebastian et al., 2022, Sorkaç et al., 2022, De and Chatterjee, 2021, Dombrovski and Condron, 2021, George and Stanewsky, 2021, Gowda et al., 2021, Kumar et al., 2021, Liu et al., 2021, Liu et al., 2021, Mishra et al., 2021, Montell, 2021, Pojer et al., 2021, Xiao and Xu, 2021, Chen and Desplan, 2020, Chen and Montell, 2020, Damulewicz et al., 2020, Delbare et al., 2020, Earl et al., 2020, Helfrich-Förster, 2020, Mazzotta et al., 2020, Sharkey et al., 2020, Tan et al., 2020, Alejevski et al., 2019, Dombrovski et al., 2019, Harbison et al., 2019, Hartenstein et al., 2019, Hawkes et al., 2019, Lehmann et al., 2019, Schlichting et al., 2019, Senthilan et al., 2019, Xie et al., 2019, Xu et al., 2019, Zahoor et al., 2019, Heinloth et al., 2018, Li et al., 2018, Ogueta et al., 2018, Song and Lee, 2018, Leung and Montell, 2017, Bernardo-Garcia et al., 2016, Crocker et al., 2016, Friedrich et al., 2016, Garbers and Wachtler, 2016, Mishra et al., 2016, Saint-Charles et al., 2016, Viets et al., 2016, Behnia and Desplan, 2015, Rister et al., 2015, Wernet et al., 2015, Hilbrant et al., 2014, Jagadish et al., 2014, Kunduri et al., 2014, Liu et al., 2014, Mahato et al., 2014, Wernet et al., 2014, Cordes et al., 2013, Farca-Luna and Sprecher, 2013, Johnston, 2013, Jukam et al., 2013, Jukam et al., 2013, Mishra et al., 2013, Pandey et al., 2013, Paulk et al., 2013, Rister et al., 2013, Schnaitmann et al., 2013, Thanawala et al., 2013, Yamanaka et al., 2013, Zhu, 2013, Pak et al., 2012, Senthilan et al., 2012, Sood et al., 2012, Szular et al., 2012, Terrell et al., 2012, Johnston et al., 2011, Luo et al., 2011, Napoletano et al., 2011, Rosenbaum et al., 2011, Sprecher et al., 2011, Yuan et al., 2011, Jukam and Desplan, 2010, McDonald et al., 2010, Mishra et al., 2010, Xiang et al., 2010, Bao and Friedrich, 2009, Birkholz et al., 2009, Birkholz et al., 2009, Edwards and Meinertzhagen, 2009, Hanai and Ishida, 2009, Hsiao et al., 2008, Miller et al., 2008, Ranade et al., 2008, Sprecher and Desplan, 2008, Jukam and Desplan, 2007, Landry et al., 2007, Pistillo and Desplan, 2007, Pistillo et al., 2007, Sprecher et al., 2007, Vasiliauskas et al., 2007, Vasiliauskas et al., 2007, Xie et al., 2007, Earl and Britt, 2006, Friedrich, 2006, Hummel and Klämbt, 2006, Mukherjee et al., 2006, Rosenbaum et al., 2006, Wernet et al., 2006, Hassan et al., 2005, Mikeladze-Dvali et al., 2005, Nelson et al., 2005, Yang et al., 2005)
        Secondary FlyBase IDs
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 45 )
          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
          Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
          Flygut - An atlas of the Drosophila adult midgut
          MIST (genetic) - An integrated Molecular Interaction Database
          MIST (protein-protein) - An integrated Molecular Interaction Database
          Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
          References (291)