FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\rasp
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General Information
Symbol
Dmel\rasp
Species
D. melanogaster
Name
rasp
Annotation Symbol
CG11495
Feature Type
FlyBase ID
FBgn0024194
Gene Model Status
Stock Availability
Enzyme Name (EC)
protein S-acyltransferase (2.3.1.225)
Gene Summary
rasp (rasp) encodes an acyltransferase enzyme that adds essential N-terminal palmitate modifications to the secreted signaling domains of the products of hh and spi. The modification of the product of spi appears to increase the local concentration of the ligand by restricting its diffusion. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

ski, sightless, skinny hedgehog, sit, central missing

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-6
RefSeq locus
NT_037436 REGION:3162180..3163852
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (11 terms)
Molecular Function (3 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from direct assay
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
non-traceable author statement
inferred from biological aspect of ancestor with PANTHER:PTN000998821
Biological Process (6 terms)
Terms Based on Experimental Evidence (6 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (0 terms)
Cellular Component (2 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000328646
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the membrane-bound acyltransferase family. HHAT subfamily. (Q9VZU2)
Catalytic Activity (EC/Rhea)
protein-cysteine S-palmitoyltransferase activity
L-cysteinyl-[protein] + hexadecanoyl-CoA = S-hexadecanoyl-L-cysteinyl- [protein] + CoA (2.3.1.225)
RHEA 36683:
Summaries
Gene Snapshot
rasp (rasp) encodes an acyltransferase enzyme that adds essential N-terminal palmitate modifications to the secreted signaling domains of the products of hh and spi. The modification of the product of spi appears to increase the local concentration of the ligand by restricting its diffusion. [Date last reviewed: 2019-03-14]
Pathway (FlyBase)
HEDGEHOG PRODUCTION -
hh is synthesized as a precursor peptide that is subsequently cleaved and lipidated to produced the mature, functional ligand. hh is modified by the enzymatic addition of a palmityl residue at the N terminus. In a separate processing step, hh self-cleaves via an intein-like activity to remove the C-terminal domain. As part of this reaction, a cholesteryl residue is added to the C-terminus of the N-terminal domain. The active form of hh is lipophilic and requires addtional players for secretion/release from hh-producing cells. (Adapted from FBrf0230446 and PMID:22114141).
EGFR LIGAND PRODUCTION -
Factors required for the proteolytic cleavage and/or secretion of transforming growth factor-α-like Egfr ligands spi, Krn or grk.
Gene Group (FlyBase)
PALMITOYLTRANSFERASES -
Palmitoyltransferases catalyze the post-translational addition of a palmitate moiety to a cysteine residue through a covalent thioester bond. (Adapted from FBrf0210485).
Protein Function (UniProtKB)
Required in hedgehog (hh) expressing cells for production of appropriate signaling activity in embryos and in the imaginal precursors of adult tissues. Acts within the secretory pathway to catalyze N-terminal palmitoylation of Hh; this lipid modification is required for the embryonic and larval patterning activities of the Hh signal. Not required for Wg signaling.
(UniProt, Q9VZU2)
Summary (Interactive Fly)

acetyltransferase acting to acylate Hedgehog or to promote other modifications or trafficking events necessary for Hedgehog function - modifies Spitz to increase the local concentration of the ligand by restricting its diffusion

Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\rasp 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 Q9VZU2)

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 5.45

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0073029
1673
500
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
UniProt
RefSeq ID
GenBank
FBpp0072893
58.1
500
8.60
Polypeptides with Identical Sequences

There is only one protein coding transcript and one polypeptide associated with this gene

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\rasp 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).

-0.09

Transcript Expression
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\rasp 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 ( 24 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 7 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of rasp
Transgenic constructs containing regulatory region of rasp
Aberrations (Deficiencies and Duplications) ( 12 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Lethality
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (2)
14 of 14
Yes
Yes
6 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) (2)
13 of 14
Yes
Yes
6 of 14
No
Yes
Mus musculus (laboratory mouse) (2)
13 of 14
Yes
Yes
6 of 14
No
Yes
Xenopus tropicalis (Western clawed frog) (3)
7 of 13
Yes
Yes
6 of 13
No
Yes
3 of 13
No
Yes
Danio rerio (Zebrafish) (3)
14 of 14
Yes
Yes
7 of 14
No
Yes
6 of 14
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (3)
14 of 14
Yes
Yes
10 of 14
No
Yes
1 of 14
No
Yes
Anopheles gambiae (African malaria mosquito) (1)
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (1)
9 of 13
Yes
Yes
Saccharomyces cerevisiae (Brewer's yeast) (2)
9 of 13
Yes
Yes
9 of 13
Yes
Yes
Schizosaccharomyces pombe (Fission yeast) (1)
8 of 12
Yes
Yes
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:rasp. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 1 )
    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.
    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
    Interaction Browsers

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    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 (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    External Data
    Linkouts
    KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
    Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
    SignaLink - A signaling pathway resource with multi-layered regulatory networks.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3L
    Recombination map
    3-6
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    63B8-63B8
    Limits computationally determined from genome sequence between P{PZ}l(3)0680306803 and P{PZ}kst01318
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    63B11-63B13
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (9)
    Genomic Clones (21)
    cDNA Clones (9)
     

    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)
    BDGP DGC clones
      RNAi and Array Information
      Linkouts
      DRSC - Results frm RNAi screens
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          rasp is necessary for palmitoylation of spi protein.

          dsRNA made from templates generated with primers directed against this gene tested in RNAi screen for effects on Kc167 and S2R+ cell morphology.

          rasp-dependent fatty-acylation is necessary to generate a fully active hh.

          rasp is a component of the hh signaling pathway. It acts upstream of ptc and is required in hh protein secreting cells and not in cells that receive the hh protein signal.

          rasp is required for palmitoylation of hh protein (a modification vital for hh signaling activity in vivo).

          rasp is required for the activity of hh in the eye and wing imaginal discs.

          Animals lacking both maternal and zygotic rasp show a segment-polarity phenotype.

          Isolated in a screen for maternal effect lethal mutations that affect the process of segmentation.

          rasp mutants have a recessive lethal segment polarity phenotype. Embryos have a continuous lawn of denticles, residual head structures and dramatically reduced ellipsoid filzkorpers.

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: l(3)SG3 l(3)63Bg

          Additional comments

          Source for identity of sightless CG11495 was sequence comparison ( date:010728 ).

          Nomenclature History
          Source for database identify of

          Source for identity of: sightless CG11495

          Nomenclature comments
          Etymology

          Named "rasp" based on the mutant embryos resemblance to a coarse file.

          The gene is named "central missing" based on the mutant phenotype; large mutant clones in the wing result in a lack of the central elements of the wing.

          Synonyms and Secondary IDs (23)
          Reported As
          Secondary FlyBase IDs
          • FBgn0002450
          • FBgn0004562
          • FBgn0005227
          • FBgn0035406
          • FBgn0044333
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 38 )
          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
          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
          InterPro - A database of protein families, domains and functional sites
          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
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
          KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
          MIST (protein-protein) - An integrated Molecular Interaction Database
          Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
          SignaLink - A signaling pathway resource with multi-layered regulatory networks.
          References (78)