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General Information
Symbol
Dmel\tsl
Species
D. melanogaster
Name
torso-like
Annotation Symbol
CG6705
Feature Type
FlyBase ID
FBgn0003867
Gene Model Status
Stock Availability
Gene Snapshot
torso-like (tsl) encodes a protein present in many organs. In particular it is produced and secreted by two cell clusters in the egg chamber, initially anchored at the vitelline membrane and then translocated to the oocyte plasma membrane where it is required for the activation of the receptor encoded by tor. [Date last reviewed: 2019-03-14]
Key Links
Genomic Location
Cytogenetic map
Sequence location
3R:21,778,114..21,782,536 [-]
Recombination map

3-73

RefSeq locus
NT_033777 REGION:21778114..21782536
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
Pathway (FlyBase)
Torso Signaling Pathway Core Components -
The formation of Drosophila embryonic termini is controlled by the localized activation of Torso (tor) receptor tyrosine kinase. The Torso signaling pathway acts via the canonical Ras/Raf/MAP kinase cascade. (Adapted from FBrf0157176.)
Gene Group (FlyBase)
UNCLASSIFIED RECEPTOR LIGANDS -
Receptor ligands are endogenous polypeptides that bind transmembrane cell surface receptors to elicit a cellular response.
Protein Function (UniProtKB)
Probable ligand that binds to the torso receptor. Implicated in a receptor tyrosine kinase signaling pathway that specifies terminal cell fate.
(UniProt, P40689)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
tsl: torsolike
Maternal-effect lethal. Anterior- and posteriormost structures (labrum, dorsal bridge, telson, eighth and part of seventh abdominal segments) deleted in embryos produced by homozygous mothers. tsl pole cells transplanted into wildtype hosts produce normal progeny, whereas the reciprocal transplant produces tsl embryos.
Summary (Interactive Fly)

torso pathway - perforin-like protein - localized determinant of terminal pattern formation - produced and secreted by two cell clusters in the egg chamber - initially anchored at the vitelline membrane and then translocated to the oocyte plasma membrane where it is required for the Track-mediated activation of Torso

Gene Model and Products
Number of Transcripts
3
Number of Unique Polypeptides
1

Please see the GBrowse view of Dmel\tsl or the JBrowse view of Dmel\tsl 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 5.47

Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0084164
1871
353
FBtr0084165
1375
353
FBtr0334312
2059
353
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
FBpp0083562
41.2
353
9.58
FBpp0083563
41.2
353
9.58
FBpp0306427
41.2
353
9.58
Polypeptides with Identical Sequences

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

353 aa isoforms: tsl-PA, tsl-PB, tsl-PC
Additional Polypeptide Data and Comments
Reported size (kDa)

356 (aa); 42 (kD predicted)

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\tsl 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 (12 terms)
Molecular Function (2 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from direct assay
Terms Based on Predictions or Assertions (0 terms)
Biological Process (9 terms)
Terms Based on Experimental Evidence (9 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (0 terms)
Cellular Component (1 term)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (0 terms)
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
antennal anlage

Comment: reported as procephalic ectoderm anlage

central brain anlage

Comment: reported as procephalic ectoderm anlage

dorsal head epidermis anlage

Comment: reported as procephalic ectoderm anlage

visual anlage

Comment: reported as procephalic ectoderm anlage

antennal primordium

Comment: reported as procephalic ectoderm primordium

central brain primordium

Comment: reported as procephalic ectoderm primordium

visual primordium

Comment: reported as procephalic ectoderm primordium

dorsal head epidermis primordium

Comment: reported as procephalic ectoderm primordium

lateral head epidermis primordium

Comment: reported as procephalic ectoderm primordium

ventral head epidermis primordium

Comment: reported as procephalic ectoderm primordium

Additional Descriptive Data

In stage S10 egg chambers, tsl expression is seen specifically in border cells and in posterior follicle cells. Early in oogenesis at stage S3, expression is seen in two follicle cells at each end of the egg chamber and later in a large number of anterior cells which were identified at the centripetally migrating follicle cells.

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

tsl is detected at the prothoracic gland and in the corpora cardiaca, but not in the corpus allatum.

Immunostaining withaffinity purified antisera indicates that tsl protein is restricted to the anterior and posterior ends of the inner vitelline membrane of the eggshell.

The pattern of tsltranscript and protein accumulation coincide, with the exception of a slightdelay in protein accumulation. During stage 4 of embryogenesis, tsl protein isdetected at the anterior and posterior poles, at 0-17% and 83-100% egg length.At the contracted germ band stage, tsl protein is present in the centralnervous system and in the tracheal system.

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\tsl 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
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Flygut - An atlas of the Drosophila adult midgut
Images
FlyExpress - Embryonic expression images (BDGP data)
  • Stages(s) 7-8
  • Stages(s) 9-10
  • Stages(s) 11-12
  • Stages(s) 13-16
Alleles, Insertions, and Transgenic Constructs
Classical and Insertion Alleles ( 24 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 18 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of tsl
Transgenic constructs containing regulatory region of tsl
Deletions and Duplications ( 8 )
Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Lethality
Allele
Sterility
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
Orthologs
Human Orthologs (via DIOPT v7.1)
Homo sapiens (Human) (0)
No records found.
Model Organism Orthologs (via DIOPT v7.1)
Mus musculus (laboratory mouse) (0)
No records found.
Rattus norvegicus (Norway rat) (0)
No records found.
Xenopus tropicalis (Western clawed frog) (0)
No records found.
Danio rerio (Zebrafish) (0)
No records found.
Caenorhabditis elegans (Nematode, roundworm) (0)
No records found.
Arabidopsis thaliana (thale-cress) (0)
No records found.
Saccharomyces cerevisiae (Brewer's yeast) (0)
No records found.
Schizosaccharomyces pombe (Fission yeast) (0)
No records found.
Orthologs in Drosophila Species (via OrthoDB v9.1) ( EOG09190ABK )
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 erecta
Drosophila yakuba
Drosophila ananassae
Drosophila pseudoobscura pseudoobscura
Drosophila persimilis
Drosophila willistoni
Drosophila virilis
Drosophila mojavensis
Drosophila grimshawi
Drosophila grimshawi
Orthologs in non-Drosophila Dipterans (via OrthoDB v9.1) ( EOG091507CE )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Musca domestica
House fly
Glossina morsitans
Tsetse fly
Lucilia cuprina
Australian sheep blowfly
Mayetiola destructor
Hessian fly
Aedes aegypti
Yellow fever mosquito
Anopheles darlingi
American malaria mosquito
Anopheles gambiae
Malaria mosquito
Culex quinquefasciatus
Southern house mosquito
Orthologs in non-Dipteran Insects (via OrthoDB v9.1) ( EOG090W09UB )
Organism
Common Name
Gene
Multiple Dmel Genes in this Orthologous Group
Bombyx mori
Silkmoth
Danaus plexippus
Monarch butterfly
Apis florea
Little honeybee
Apis mellifera
Western honey bee
Bombus impatiens
Common eastern bumble bee
Bombus terrestris
Buff-tailed bumblebee
Linepithema humile
Argentine ant
Megachile rotundata
Alfalfa leafcutting bee
Nasonia vitripennis
Parasitic wasp
Dendroctonus ponderosae
Mountain pine beetle
Dendroctonus ponderosae
Mountain pine beetle
Tribolium castaneum
Red flour beetle
Pediculus humanus
Human body louse
Rhodnius prolixus
Kissing bug
Cimex lectularius
Bed bug
Acyrthosiphon pisum
Pea aphid
Zootermopsis nevadensis
Nevada dampwood termite
Orthologs in non-Insect Arthropods (via OrthoDB v9.1) ( EOG090X09Q8 )
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) (0)
No records found.
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
    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
    esyN Network Diagram
    Interactions Browser
    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
    BioGRID - A database of protein and genetic interactions.
    DroID - A comprehensive database of gene and protein interactions.
    InterologFinder - Protein-protein interactions (PPI) from both known and predicted PPI data sets.
    MIST (genetic) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Torso Signaling Pathway Core Components -
    The formation of Drosophila embryonic termini is controlled by the localized activation of Torso (tor) receptor tyrosine kinase. The Torso signaling pathway acts via the canonical Ras/Raf/MAP kinase cascade. (Adapted from FBrf0157176.)
    Metabolic Pathways
    External Data
    Linkouts
    KEGG Pathways - Wiring diagrams of molecular interactions, reactions and relations.
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3R
    Recombination map

    3-73

    Cytogenetic map
    Sequence location
    3R:21,778,114..21,782,536 [-]
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    93F9-93F10
    Limits computationally determined from genome sequence between P{PZ}InR05545 and P{PZ}tsl00617
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    93F6-93F14
    (determined by in situ hybridisation)
    93F-93F
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (14)
    Genomic Clones (16)
     

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

    cDNA Clones (104)
     

    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)
    BDGP DGC clones
    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 database merge of
    Additional comments
    Other Comments

    fs(1)N and fs(1)M3 are necessary for extracellular accumulation of tsl.

    tsl expressed in the germ line cells is fully functional in the mechanism of tor activation.

    In a sample of 79 genes with multiple introns, 33 showed significant heterogeneity in G+C content among introns of the same gene and significant positive correspondence between the intron and the third codon position G+C content within genes. These results are consistent with selection adding against preferred codons at the start of genes.

    tsl is involved in the directed intercalation of cells during germ band extension.

    tsl encodes a protein that is secreted and whose transcription is restricted to specialized categories of follicle cells localised at poles of the egg chamber. tsl is follicle cell-dependent.

    "Splice" phenotype of torNRE dependent on tll, trk and tsl.

    The role of tsl in the regulation of run mRNA expression in the early embryo has been investigated.

    tsl gene product has been isolated and characterised.

    The maternal terminal system is necessary to activate tll expression in the terminal caps.

    tsl mutants exhibit deletion of the acron and telson.

    Mature follicles are immunologically stained for asymmetric distribution of ecdysteroid-related antigen. During late oogenesis localisation of the antigen changes dramatically suggesting the antigen plays a role in early embryogenesis and, perhaps, in pattern formation.

    tsl function is required in subpopulations of follicle cells located at the poles of the oocyte.

    Origin and Etymology
    Discoverer
    Etymology
    Identification
    External Crossreferences and Linkouts ( 43 )
    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/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
    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
    Flygut - An atlas of the Drosophila adult midgut
    GenomeRNAi - A database for cell-based and in vivo RNAi phenotypes and reagents
    iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
    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
    SignaLink - A signaling pathway resource with multi-layered regulatory networks.
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    DPiM - Drosophila Protein interaction map
    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
    FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
    FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
    FlyMine - An integrated database for Drosophila genomics
    Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
    InterologFinder - Protein-protein interactions (PPI) from both known and predicted PPI data sets.
    KEGG Pathways - Wiring diagrams of molecular interactions, reactions and relations.
    MIST (genetic) - An integrated Molecular Interaction Database
    Synonyms and Secondary IDs (11)
    Reported As
    Secondary FlyBase IDs
      Datasets (0)
      Study focus (0)
      Experimental Role
      Project
      Project Type
      Title
      References (175)