FB2026_02 , released June 18, 2026
Allele: Dmel\spn-Dunspecified
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General Information
Symbol
Dmel\spn-Dunspecified
Species
D. melanogaster
Name
FlyBase ID
FBal0086325
Feature type
allele
Associated gene
Dmel\spn-D
Associated Insertion(s)
Carried in Construct
Key Links
Allele class
Mutagen
    Nature of the Allele
    Allele class
    Mutagen
    Progenitor genotype
    Cytology
    Description

    FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.

    (FlyBase Curators, 2025-)
    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

        Condensation of DNA in the oocyte nucleus to form the karyosome is aberrant in homozygous egg chambers. In some cases the DNA forms an ellipsoidal shape that is larger than normal, and in other cases the DNA is present in clumps that line the inside of the nuclear membrane.

        (Ghabrial et al., 1998)

        Maternal effect mutation similar to spn-A. Embryos sometimes hatch.

        (Tearle and Nusslein-Volhard, 1987)
        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
        Rescued by

        spn-Dunspecified is rescued by spn-D+Aa

        (Abdu et al., 2003)
        Comments
        Images (0)
        Mutant
        Wild-type
        Stocks (0)
        Notes on Origin
        Discoverer
        External Crossreferences and Linkouts ( 0 )
        Synonyms and Secondary IDs (1)
        Reported As
        Symbol Synonym
        spn-Dunspecified
        Name Synonyms
        Secondary FlyBase IDs
          References (4)