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General Information
Symbol
Dmel\RhoGAP18B
Species
D. melanogaster
Name
Rho GTPase activating protein at 18B
Annotation Symbol
CG42274
Feature Type
FlyBase ID
FBgn0261461
Gene Model Status
Stock Availability
Gene Snapshot
Rho GTPase activating protein at 18B (RhoGAP18B) encodes a protein that can act as a GTPase activating protein for several Rho GTPase and is involved in the regulation of actin dynamics. [Date last reviewed: 2019-08-01]
Also Known As
whir, white rabbit
Key Links
Genomic Location
Cytogenetic map
Sequence location
X:19,136,107..19,167,082 [-]
Recombination map
1-62
Sequence
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
GO Summary Ribbons
Gene Group (FlyBase)
Protein Family (UniProt)
-
Molecular Function (GO)
[Detailed GO annotations]
Experimental Evidence
Predictions / Assertions
-
Summaries
Gene Group (FlyBase)
RHO GTPASE ACTIVATING PROTEINS -
RhoGAPs are GTPase activating proteins for Rho family GTPases. (Adapted from PMID:15731001 and FBrf0158741).
Gene Model and Products
Number of Transcripts
5
Number of Unique Polypeptides
3

Please see the GBrowse view of Dmel\RhoGAP18B or the JBrowse view of Dmel\RhoGAP18B 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 5.55
Gene model reviewed during 5.42
Low-frequency RNA-Seq exon junction(s) not annotated.
Annotated transcripts do not represent all possible combinations of alternative exons and/or alternative promoters.
Transposon in 3' UTR.
Gene model reviewed during 5.49
Gene model reviewed during 5.56
Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0299622
2208
468
FBtr0299623
4695
1317
FBtr0299624
3931
752
FBtr0299625
1689
468
FBtr0339261
1787
468
Additional Transcript Data and Comments
Reported size (kB)
Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
RefSeq ID
GenBank
FBpp0288897
52.2
468
8.27
FBpp0288898
147.3
1317
6.87
FBpp0288899
84.5
752
4.85
FBpp0288900
52.2
468
8.27
FBpp0308368
52.2
468
8.27
Polypeptides with Identical Sequences

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

Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Crossreferences
InterPro - A database of protein families, domains and functional sites
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\RhoGAP18B 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 (2 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from physical interaction with FLYBASE:Rac1; FB:FBgn0010333
inferred from physical interaction with FLYBASE:Cdc42; FB:FBgn0010341
inferred from physical interaction with FLYBASE:Rho1; FB:FBgn0014020
Terms Based on Predictions or Assertions (0 terms)
Biological Process (4 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000571279
(assigned by GO_Central )
inferred from electronic annotation with InterPro:IPR000198, InterPro:IPR008936
(assigned by InterPro )
Cellular Component (1 term)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000571279
(assigned by GO_Central )
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
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
organism

Comment: maternally deposited

northern blot
Stage
Tissue/Position (including subcellular localization)
Reference
RT-PCR
Stage
Tissue/Position (including subcellular localization)
Reference
adult head

Comment: isoforms RA, RC and RD

Additional Descriptive Data
Expression in stage P3 pupal leg discs is ubiquitous.
RhoGAP18B isoform RD is detected in both adult head and body whereas isoform RA is just detected in the body and isoform RC predominantly in the adult head.
Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

GBrowse - Visual display of RNA-Seq signals

View Dmel\RhoGAP18B 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
BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
FLIGHT - Cell culture data for RNAi and other high-throughput technologies
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Images
Alleles, Insertions, and Transgenic Constructs
Classical and Insertion Alleles ( 58 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 13 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of RhoGAP18B
Transgenic constructs containing regulatory region of RhoGAP18B
Deletions and Duplications ( 0 )
Phenotypes
Orthologs
Human Orthologs (via DIOPT v7.1)
Homo sapiens (Human) (5)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
2 of 15
Yes
Yes
2 of 15
Yes
Yes
2 of 15
Yes
No
2 of 15
Yes
Yes
1 of 15
No
No
Model Organism Orthologs (via DIOPT v7.1)
Mus musculus (laboratory mouse) (5)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
2 of 15
Yes
Yes
2 of 15
Yes
Yes
2 of 15
Yes
No
2 of 15
Yes
Yes
1 of 15
No
No
Rattus norvegicus (Norway rat) (5)
2 of 13
Yes
Yes
2 of 13
Yes
Yes
2 of 13
Yes
Yes
1 of 13
No
No
1 of 13
No
No
Xenopus tropicalis (Western clawed frog) (3)
1 of 12
Yes
Yes
1 of 12
Yes
Yes
1 of 12
Yes
No
Danio rerio (Zebrafish) (8)
2 of 15
Yes
No
2 of 15
Yes
Yes
2 of 15
Yes
Yes
2 of 15
Yes
Yes
2 of 15
Yes
Yes
1 of 15
No
No
1 of 15
No
No
Caenorhabditis elegans (Nematode, roundworm) (3)
1 of 15
Yes
No
1 of 15
Yes
Yes
1 of 15
Yes
No
Arabidopsis thaliana (thale-cress) (1)
1 of 9
Yes
Yes
Saccharomyces cerevisiae (Brewer's yeast) (5)
2 of 15
Yes
No
1 of 15
No
Yes
1 of 15
No
No
1 of 15
No
No
1 of 15
No
No
Schizosaccharomyces pombe (Fission yeast) (4)
2 of 12
Yes
Yes
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
Orthologs in Drosophila Species (via OrthoDB v9.1) ( EOG0919047J )
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 sechellia
Drosophila erecta
Drosophila yakuba
Drosophila ananassae
Drosophila pseudoobscura pseudoobscura
Drosophila pseudoobscura pseudoobscura
Drosophila persimilis
Drosophila willistoni
Drosophila virilis
Drosophila mojavensis
Drosophila grimshawi
Drosophila grimshawi
Orthologs in non-Drosophila Dipterans (via OrthoDB v9.1) ( None identified )
No non-Drosophilid orthologies identified
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) ( EOG090X022Y )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Daphnia pulex
Water flea
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) (8)
2 of 10
2 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
Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
 
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
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
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
Gene Group - Pathway Membership (FlyBase)
External Data
Linkouts
Genomic Location and Detailed Mapping Data
Chromosome (arm)
X
Recombination map
1-62
Cytogenetic map
Sequence location
X:19,136,107..19,167,082 [-]
FlyBase Computed Cytological Location
Cytogenetic map
Evidence for location
18A3-18A4
Limits computationally determined from genome sequence between P{EP}CG7326EP1133 and P{EP}CG7502EP1326
Experimentally Determined Cytological Location
Cytogenetic map
Notes
References
Experimentally Determined Recombination Data
Location
Left of (cM)
Right of (cM)
Notes
Stocks and Reagents
Stocks (48)
Genomic Clones (27)
cDNA Clones (132)
 

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)
    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
     
    Commercially Available Antibodies
     
    Other Information
    Relationship to Other Genes
    Source for database identify of
    Source for identity of: whir 5-131
    Source for database merge of
    Source for merge of: RhoGAP18B CG7502
    Source for merge of: RhoGAP18B whir
    Source for merge of: CG7481 CG7531
    Source for merge of: RhoGAP18B CG17015
    Additional comments
    Annotations CG7481 and CG7502 merged as CG42274 in release 5.8 of the genome annotation.
    Annotations CG7481, CG17015 and CG7531 merged as CG7481 in release 3 of the genome annotation.
    Source for merge of CG7481 CG7531 was a shared cDNA ( date:010720 ).
    Other Comments
    Different isoforms of RhoGAP18B act via inhibiting distinct Rho-family GTPases to regulate actin dynamics.
    RhoGAP18B is transcribed from at least two promoters separated by approximately 11kb.
    RhoGAP18B mutants exhibit strong resistance to the sedating effects of ethanol.
    Mutants show resistance to the behavioral effects of nicotine and altered responses to ethanol.
    dsRNA made from templates generated with primers directed against this gene tested in RNAi screen for effects on Kc167 and S2R+ cell morphology.
    RNAi screen using dsRNA made from templates generated with primers directed against this gene causes a phenotype when assayed in Kc167 and S2R+ cells: increased or polarized (uneven) accumulation of F-actin.
    Mutants are resistant to the behavioral effects of both nicotine and ethanol. Mutants show a strongly accentuated and prolonged startle response, suggesting that they are more sensitive to the sensory input of the alcohol smell, or more responsive to it.
    Origin and Etymology
    Discoverer
    Etymology
    Named 'white rabbit' for its diverse role in regulating responses to abused drugs as described in the song 'White Rabbit' by Jefferson Airplane.
    Identification
    External Crossreferences and Linkouts ( 69 )
    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 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/TrEMBL - Automatically annotated and unreviewed records of protein sequence and functional information
    Other crossreferences
    BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
    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
    FlyMine - An integrated database for Drosophila genomics
    GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
    InterPro - A database of protein families, domains and functional sites
    KEGG Genes - Molecular building blocks of life in the genomic space.
    modMine - A data warehouse for the modENCODE project
    Linkouts
    DroID - A comprehensive database of gene and protein interactions.
    DRSC - Results frm RNAi screens
    FLIGHT - Cell culture data for RNAi and other high-throughput technologies
    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 (70)