FB2026_02 , released June 18, 2026
Allele: Dmel\robo1::robo22-1.robo2.HR.Tag:HA
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General Information
Symbol
Dmel\robo1::robo22-1.robo2.HR.Tag:HA
Species
D. melanogaster
Name
FlyBase ID
FBal0243840
Feature type
allele
Associated gene
robo1::robo2
Associated Insertion(s)
TI{TI}robo2KO.robo2-1
Carried in Construct
Also Known As
robo2robo2-1
Key Links
Allele class
Mutagen
Nature of the Allele
Allele class
Mutagen
recombination
(Spitzweck et al., 2010)
I-SceI
(Spitzweck et al., 2010)
FLPase
(Spitzweck et al., 2010)
I-CreI
(Spitzweck et al., 2010)
ends-in gene targeting
(Spitzweck et al., 2010)
Progenitor genotype
Associated Insertion(s)
TI{TI}robo2KO.robo2-1
Cytology
Description

The exons (and intervening small introns) that encode the mature robo2 protein have been replaced with a chimeric receptor (tagged with Tag:HA) containing the robo2 ectodomain and the robo1 cytoplasmic domain. The robo2KO.robo2-1 allele represents the loss of the robo2 open reading frame at the endogenous robo2 locus, while the robo1::robo22-1.robo2.HR.Tag:HA allele represents the chimeric receptor (tagged with Tag:HA) containing the robo2 ectodomain and the robo1 cytoplasmic domain that is expressed under the control of the robo2 regulatory sequences in place of robo2.

(Spitzweck et al., 2010)
Allele components
Component
Use(s)
Tagged with
Tag:HA
Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
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
      External Data
      Interactions
      Show genetic interaction network for Enhancers & Suppressors
      Phenotypic Class
      Phenotype Manifest In
      Additional Comments
      Genetic Interactions
      Statement
      Reference

      Fas2-positive longitudinal axons cross the midline in only 0.6% of segments in leaKO.robo2-1 robo::lea2-1.lea.HR.T:Ivir\HA1 double homozygous embryos (compared to in 23.7% of segments in lea null mutant embryos).

      (Spitzweck et al., 2010)
      Xenogenetic Interactions
      Statement
      Reference
      Complementation and Rescue Data
      Comments
      Images (0)
      Mutant
      Wild-type
      Stocks (0)
      Notes on Origin
      Discoverer
      External Crossreferences and Linkouts ( 0 )
      Synonyms and Secondary IDs (5)
      Reported As
      Symbol Synonym
      robo1::robo22-1.lea.HR.T:Ivir\HA1
      robo1::robo22-1.robo2.HR.T:Ivir\HA1
      robo1::robo22-1.robo2.HR.Tag:HA
      robo2robo2-1
      (Santiago et al., 2014, Spitzweck et al., 2010)
      robo::lea2-1.lea.HR.T:Ivir\HA1
      Name Synonyms
      Secondary FlyBase IDs
        References (3)