FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\Su(var)20503
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General Information
Symbol
Dmel\Su(var)20503
Species
D. melanogaster
Name
FlyBase ID
FBal0095556
Feature type
allele
Associated gene
Dmel\Su(var)205
Associated Insertion(s)
Carried in Construct
Also Known As
Su(var)2-503
Key Links
Allele class
Mutagen
Nature of the Allele
Allele class
Mutagen
ethyl methanesulfonate
(Westphal and Reuter, 2002)
Progenitor genotype
Cytology
Description
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

      A moderately sized pseudopuff is seen in the area of the 20F-3C eu-heterochromatin junction in the In(1)wm4h salivary gland polytene chromosome in the Su(var)20503/Su(var)2055 mutant background.

      (Demakova et al., 2007)

      Heterozygotes show no effect on crossing over between kni and pp.

      (Westphal and Reuter, 2002)

      Neuroblasts in the brain of Su(var)20503/Su(var)2055 larvae show a high frequency of abnormal metaphase configurations, including telomere-telomere fusions.

      (Fanti et al., 1998)
      External Data
      Interactions
      Show genetic interaction network for Enhancers & Suppressors
      Phenotypic Class
      Phenotype Manifest In
      Additional Comments
      Genetic Interactions
      Statement
      Reference

      Has no effect on the frequency of X-Y chromosome nondisjunction seen in Df(1)X-1-53B males.

      (McKee et al., 2000)
      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 (3)
      Reported As
      Symbol Synonym
      2-503
      (McKee et al., 2000)
      Su(var)2-503
      (Demakova et al., 2007, Westphal and Reuter, 2002, Fanti et al., 1998)
      Su(var)20503
      Name Synonyms
      Secondary FlyBase IDs
        References (5)