FB2026_02 , released June 18, 2026
FB2026_02 , released June 18, 2026
Gene: Dmel\tok
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General Information
Symbol
Dmel\tok
Species
D. melanogaster
Name
tolkin
Annotation Symbol
CG6863
Feature Type
FlyBase ID
FBgn0004885
Gene Model Status
Stock Availability
Gene Summary
tolkin (tok) encodes a Zinc metallopeptidase with similar substrate specificity to the product of tld, which is its paralog. It cleaves the product of sog as well as the prodomains of several TGF-beta ligands. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

tlr, tolloid-related 1, tlr-1, tldr-1, tolloid-related

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-85
RefSeq locus
NT_033777 REGION:24719697..24749125
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 (4 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from direct assay
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
Biological Process (9 terms)
Terms Based on Experimental Evidence (7 terms)
CV Term
Evidence
References
involved_in axon guidance
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
involved_in protein processing
inferred from direct assay
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN001298759
involved_in protein processing
inferred from biological aspect of ancestor with PANTHER:PTN001298759
involved_in proteolysis
inferred from electronic annotation with InterPro:IPR001506, InterPro:IPR006026
Cellular Component (2 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from direct assay
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
located_in perikaryon
inferred from experiment
Gene Group (FlyBase)
Protein Family (UniProt)
-
Summaries
Gene Snapshot
tolkin (tok) encodes a Zinc metallopeptidase with similar substrate specificity to the product of tld, which is its paralog. It cleaves the product of sog as well as the prodomains of several TGF-beta ligands. [Date last reviewed: 2019-03-14]
Pathway (FlyBase)
POSITIVE REGULATORS OF BMP SIGNALING PATHWAY -
Positive regulators of Bone Morphogenetic Protein (BMP) signaling up-regulate the pathway, ultimately resulting in the increased nuclear activity of the Mad/Med transcription factor complex.
POSITIVE REGULATORS OF ACTIVIN SIGNALING PATHWAY -
Positive regulators of activin signaling up-regulate the pathway, ultimately resulting in the increased nuclear activity of the Smox/Med transcription factor complex.
Gene Group (FlyBase)
ASTACINS -
Astacins belong to MEROPS family M12, subfamily A, and also to the group of peptidases known as the "metzincins", due to a conserved methionine C-terminal to the zinc ligands. They are multi-domain metallopeptidases with manifold functions in metabolism. They are either secreted or membrane-anchored. (Adapted from FBrf0239469 and PMID:23092796.)
Protein Function (UniProtKB)
Metalloprotease which is required for cleavage of sli into slit N-product and slit C-product, ensuring correct slit N-product-mediated longitudinal axon guidance (PubMed:32994163). Also cleaves TGF-beta family ligands daw, Actbeta and myo and is required for normal guidance of motor axons to their muscle targets (PubMed:17119021). Cleavage of daw enhances its signaling activity (PubMed:17119021). Required during mid- to late-embryonic stages for defasciculation of motor axons (PubMed:16971470, PubMed:17119021). During pupal development, cleaves dorsal-ventral patterning protein sog which contributes to specification of the posterior crossvein in the wing (PubMed:15872004). Processes sog less efficiently than metalloprotease tld which also cleaves sog (PubMed:15872004). Promotes BMP signal transduction in the caudal visceral mesoderm, resulting in the translocation of Mad to the nucleus to promote stg transcription which allows for cell cycle progression and promotion of levels of cell death protein hid (PubMed:35709766). This leads to elimination of cells that lose access to substrate-derived FGF during migration (PubMed:35709766).
(UniProt, Q9VC47)
Summary (Interactive Fly)

BMP-1 homolog - a Zinc metallopeptidase with similar substrate specificity to tolloid, which is its paralog. Tok cleaves the Decapentaplegic inhibitor Short gastrulation as well as the prodomains of several TGF-beta ligands

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

Please see the JBrowse view of Dmel\tok 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 Q9VC47)

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

Low-frequency RNA-Seq exon junction(s) not annotated.

Gene model reviewed during 5.49

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0084690
5368
1464
FBtr0084689
5247
1464
FBtr0339252
5364
1464
Additional Transcript Data and Comments
Reported size (kB)

5.5 (northern blot)

5.4 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0084069
165.2
1464
6.26
FBpp0084068
165.2
1464
6.26
FBpp0308359
165.2
1464
6.26
Polypeptides with Identical Sequences

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

1464 aa isoforms: tok-PA, tok-PB, tok-PC
Additional Polypeptide Data and Comments
Reported size (kDa)

1464 (aa); 165 (kD predicted)

Comments
External Data
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\tok 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).

-0.71

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
northern blot
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

tok transcripts are expressed throughout development. They are first detected by in situ hybridization in the dorsal part of the blastoderm embryo. During germ band extension, tok is exressed near the mesectoderm. During stage 10, three faint lateral spots are observed in the thoracic segments. During dorsal closure, expression is seen in cells that will form the corpus allatum of the ring gland. Expression is also observed in a few cells in the CNS, a few of which were tentatively identified as RP neurons or just lateral to them. In later embryos, expression is observed in many large ventral cells in the nerve cord. In the larval brain, tok is expressed in distinct rings in both hemispheres, one of which corresponds to the outer proliferation center. tok stains most imaginal discs in their entirety with some areas staining more intensely than others. In the eye imaginal disc, the staining is located anterior to the morphogenetic furrow. A comparison of the expression patterns of tok, tld, and dpp is made.

tok transcripts are expressed throughout development with the highest levels in larvae and pupae. By in situ hybridization, they are first detected on the dorsal surface of late cellular blastoderm embryos. In early stages of germ band extension, they are detected in the anterior and posterior midgut invaginations and later in the visceral mesoderm and pharynx. At stage 10, expression is observed in patches of thoracic cells thought to be proneural clusters and later strong expression is observed in thoracic PNS cells. At stage 10-11, transient expression is observed in optic lobe precursor cells. During dorsal closure, cells that will form the corpus allatum express tok. At stage 17, tok expression is observed in the CNS, in thoracic clusters thought to be the basiconical sensillum and in the proventriculus. In third instar larvae, tok is expressed in all imaginal discs and in the proliferative regions of the optic lobes. In the eye discs, strong tok expression is only found anterior to the morphogenetic furrow. Complex patterns of staining are seen in the other discs. Expression also continues in the corpus allatum of the ring gland. With the exception of the ring gland, the pattern of tok is very similar to that of tld in larval tissues but tld is expressed at a significantly lower level.

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

JBrowse - Visual display of RNA-Seq signals

View Dmel\tok 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
BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
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
FlyExpress - Embryonic expression images (BDGP data)
  • Stages(s) 4-6
  • Stages(s) 7-8
  • Stages(s) 13-16
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 31 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 8 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of tok
Transgenic constructs containing regulatory region of tok
Aberrations (Deficiencies and Duplications) ( 4 )
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
Sterility
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
larval neuromuscular junction & abdominal dorsal acute muscle 1 (with tokD427)
larval neuromuscular junction & abdominal dorsal acute muscle 1 (with tokK788)
larval neuromuscular junction & abdominal dorsal acute muscle 2 (with tokD427)
larval neuromuscular junction & abdominal dorsal acute muscle 2 (with tokK788)
larval neuromuscular junction & abdominal dorsal oblique muscle 1 (with tokD427)
larval neuromuscular junction & abdominal dorsal oblique muscle 1 (with tokK788)
larval neuromuscular junction & abdominal dorsal oblique muscle 2 (with tokD427)
larval neuromuscular junction & abdominal dorsal oblique muscle 2 (with tokK788)
larval neuromuscular junction & abdominal lateral transverse muscle 1 (with tokD427)
larval neuromuscular junction & abdominal lateral transverse muscle 1 (with tokK788)
larval neuromuscular junction & abdominal lateral transverse muscle 2 (with tokD427)
larval neuromuscular junction & abdominal lateral transverse muscle 2 (with tokK788)
larval neuromuscular junction & abdominal lateral transverse muscle 3 (with tokD427)
larval neuromuscular junction & abdominal lateral transverse muscle 3 (with tokK788)
larval neuromuscular junction & abdominal lateral transverse muscle 4 (with tokD427)
larval neuromuscular junction & abdominal lateral transverse muscle 4 (with tokK788)
larval neuromuscular junction & abdominal ventral acute muscle 1 (with tokD427)
larval neuromuscular junction & abdominal ventral acute muscle 1 (with tokK788)
larval neuromuscular junction & abdominal ventral acute muscle 2 (with tokD427)
larval neuromuscular junction & abdominal ventral acute muscle 2 (with tokK788)
larval neuromuscular junction & abdominal ventral acute muscle 3 (with tokD427)
larval neuromuscular junction & abdominal ventral acute muscle 3 (with tokK788)
larval neuromuscular junction & abdominal ventral longitudinal muscle 1 (with tokD427)
larval neuromuscular junction & abdominal ventral longitudinal muscle 1 (with tokK788)
larval neuromuscular junction & abdominal ventral longitudinal muscle 2 (with tokD427)
larval neuromuscular junction & abdominal ventral longitudinal muscle 2 (with tokK788)
larval neuromuscular junction & abdominal ventral longitudinal muscle 3 (with tokD427)
larval neuromuscular junction & abdominal ventral longitudinal muscle 3 (with tokK788)
larval neuromuscular junction & abdominal ventral longitudinal muscle 4 (with tokD427)
larval neuromuscular junction & abdominal ventral longitudinal muscle 4 (with tokK788)
larval neuromuscular junction & abdominal ventral oblique muscle 4 (with tokD427)
larval neuromuscular junction & abdominal ventral oblique muscle 4 (with tokK788)
larval neuromuscular junction & abdominal ventral oblique muscle 5 (with tokD427)
larval neuromuscular junction & abdominal ventral oblique muscle 5 (with tokK788)
larval neuromuscular junction & abdominal ventral oblique muscle 6 (with tokD427)
larval neuromuscular junction & abdominal ventral oblique muscle 6 (with tokK788)
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (59)
12 of 14
Yes
Yes
11 of 14
No
Yes
2  
11 of 14
No
Yes
1  
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1  
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1  
1 of 14
No
No
1  
1 of 14
No
Yes
1 of 14
No
No
1  
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1  
1 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
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1  
1 of 14
No
No
1  
1 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
No
1  
1 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
No
1 of 14
No
No
1 of 14
No
Yes
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) (30)
12 of 14
Yes
No
11 of 14
No
No
11 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
Mus musculus (laboratory mouse) (31)
11 of 14
Yes
No
11 of 14
Yes
No
11 of 14
Yes
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
Xenopus tropicalis (Western clawed frog) (53)
8 of 13
Yes
No
8 of 13
Yes
No
7 of 13
No
Yes
2 of 13
No
No
2 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
Danio rerio (Zebrafish) (47)
12 of 14
Yes
No
11 of 14
No
No
11 of 14
No
No
3 of 14
No
No
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
2 of 14
No
No
2 of 14
No
No
2 of 14
No
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
Yes
1 of 14
No
No
1 of 14
No
Yes
1 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
No
1 of 14
No
No
1 of 14
No
Yes
1 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
No
1 of 14
No
Yes
1 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
No
1 of 14
No
No
1 of 14
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (93)
12 of 14
Yes
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 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
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
1 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
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 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
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
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
Anopheles gambiae (African malaria mosquito) (33)
11 of 12
Yes
Yes
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
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:tok. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (33)
11 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
3 of 13
2 of 13
2 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
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 ( 2 )
    Modifiers Based on Experimental Evidence ( 0 )
    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
    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
    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)
    3R
    Recombination map
    3-85
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    96A18-96A19
    Limits computationally determined from genome sequence between P{PZ}crb07207&P{PZ}BRWD305842 and P{EP}CycB3EP3127
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (19)
    Genomic Clones (25)
    cDNA Clones (34)
     

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

        Point mutations and deletions in tok indicate it is vital during larval and pupal stages. Escapers of heteroallelic combinations have wing defects in which the posterior crossvein is missing. tok is expressed throughout embryogenesis in patterns that overlap and diverge from tld and dpp.

        tok is necessary for the proper development of the brain and imaginal discs and is involved in the specification of cell fates in the wing.

        The tld gene is the result of an ancient duplication that gave rise to the tld and tok genes, tok lies about 600bp 5' to tld. tok, like tld, is expressed throughout development and is mutatable to a lethal phenotype during larval stages.

        tok has been isolated, sequenced, expression pattern and mutant phenotype studied. tok is required for proper larval and pupal development. tok and tld arose by an ancient gene duplication event and each has subsequently evolved stage specific functions so they are no longer functionally equivalent.

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

        Source for identity of: tok CG6863

        Nomenclature comments
        Etymology
        Synonyms and Secondary IDs (20)
        Reported As
        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 ( 135 )
          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/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.
          BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
          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)
          MEROPS - An information resource for peptidases (also termed proteases, proteinases and proteolytic enzymes) and the proteins that inhibit them.
          Linkouts
          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
          FlyMet - A comprehensive tissue-specific metabolomics resource for Drosophila.
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
          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 (121)