FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\btlBN
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General Information
Symbol
Dmel\btlBN
Species
D. melanogaster
Name
FlyBase ID
FBal0288476
Feature type
allele
Associated gene
Dmel\btl
Associated Insertion(s)
Carried in Construct
Key Links
Genomic Maps

Allele class
Mutagen
Nature of the Allele
Allele class
Mutagen
ethyl methanesulfonate
(Ghabrial et al., 2011)
Progenitor genotype
Cytology
Description

Amino acid replacement: E796K.

(Ghabrial et al., 2011, Ghabrial and Krasnow, 2006)

Nucleotide substitution: G?A.

(Ghabrial et al., 2011)
Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
point_mutation
3L:14,081,997..14,081,997 [+]
Nucleotide change:

G14081997A

Reported nucleotide change:

G?A

Amino acid change:

E796K | btl-PA; E796K | btl-PB

Reported amino acid change:

E796K

(Ghabrial et al., 2011, Ghabrial and Krasnow, 2006)
Variant Molecular Consequences
Associated Sequence Data
DDBJ / EMBL / GenBank
DNA sequence
Protein sequence
 
UniProtKB/Swiss-Prot
    UniProtKB/TrEMBL
      Expression Data
      Reporter Expression
      Additional Information
      Statement
      Reference
       
      Marker for
      Reflects expression of
      Reporter construct used in assay
      Human Disease Associations
      Disease Ontology (DO) Annotations
      Models Based on Experimental Evidence ( 0 )
      Disease
      Evidence
      References
      Modifiers Based on Experimental Evidence ( 0 )
      Disease
      Interaction
      References
      Comments on Models/Modifiers Based on Experimental Evidence ( 0 )
       
      Disease-implicated variant(s)
       
      Phenotypic Data
      Phenotypic Class
      Phenotype Manifest In
      Detailed Description
      Statement
      Reference

      btlBN40 mutants do not exhibit tracheal terminal cells.

      (Ghabrial et al., 2011)

      Homozygotes survive until the third larval instar or beyond. They have a normally patterned tracheal system with a full complement of terminal cells, however the terminal branches of the trachea are reduced in number and have an altered morphology compared to wild type.

      In mosaic animals, homozygous mutant cells rarely develop as terminal cells in the dorsal tracheal branch and increase in frequency towards the branch base.

      btlBN/btl724 larvae lack dorsal tracheal branches.

      (Ghabrial and Krasnow, 2006)
      External Data
      Interactions
      Show genetic interaction network for Enhancers & Suppressors
      Phenotypic Class
      Phenotype Manifest In
      Additional Comments
      Genetic Interactions
      Statement
      Reference
      Xenogenetic Interactions
      Statement
      Reference
      Complementation and Rescue Data
      Fails to complement

      btlLG18

      (Ghabrial et al., 2011)
      Comments
      Images (0)
      Mutant
      Wild-type
      Stocks (1)
      Notes on Origin
      Discoverer
      External Crossreferences and Linkouts ( 0 )
      Synonyms and Secondary IDs (3)
      Reported As
      Symbol Synonym
      BN40
      (Ghabrial et al., 2011)
      btlBN40
      btlBN
      (Ghabrial and Krasnow, 2006)
      Name Synonyms
      Secondary FlyBase IDs
      • FBal0196822
      • FBal0268706
      References (2)