FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\okr782
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General Information
Symbol
Dmel\okr782
Species
D. melanogaster
Name
FlyBase ID
FBal0154812
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
okrZ0682
Key Links
Genomic Maps

Allele class
Nature of the Allele
Allele class
Progenitor genotype
Cytology
Description

Amino acid replacement: T660I.

Mutations Mapped to the Genome
Curation Data
Type
Location
Additional Notes
References
Nucleotide change:

C2990499T

Reported nucleotide change:

C?T

Amino acid change:

T660I | okr-PA

Reported amino acid change:

T660I

Variant Molecular Consequences
Associated Sequence Data
DNA sequence
Protein sequence
 
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

okr782/okr782 females exhibit reduced fertility, and female meioses show a significant increase in X chromosome non-disjunction, a decrease in crossover frequency along most of the X and 3rd chromosomes, but an increase in crossover frequency in some of the regions close to the centromere. Crossover frequency of chromosome 2 is decreased.

When exposed to X-rays during the first 8 hours of embryonic development, the ratio of Df(2L)JS17/okr17-11 to okr17-11/+ flies in the offspring of Df(2L)JS17/okr17-11 females decreases with increasing x-ray dosage (0-15 Gy at about 1 Gy/min). In contrast, the ratio of Df(2L)JS17/okr17-11 to okr17-11/+ flies in the offspring of Df(2L)JS17/+ females does not decrease with dosage. At a dose of 9 Gy, nearly a fourfold difference in sensitivity is seen between the Df(2L)JS17/okr17-11 offspring from okr17-11 homozygous females in comparison to the offspring from Df(2L)JS17/+ females. Among 8-24 or 24-48 hour-old embryos and larvae, no difference in sensitivity is seen between Df(2L)JS17/okr17-11 offspring from okr17-11 homozygous mothers and those from Df(2L)JS17/+.

okr782 mutants exhibit a reduction in meiotic crossing over (to approximately 30% that of wild-type).

okr782 mutants are fertile.

External Data
Interactions
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Phenotypic Class
Enhanced by
Statement
Reference
Phenotype Manifest In
Additional Comments
Genetic Interactions
Statement
Reference

okr782/okr782, c(2)MZ0810/c(2)MZ0810 double mutant female meioses exhibit reduced crossover frequency along most of the X chromosome, but significantly higher crossover frequency near the centromere, as compared to either single mutant.

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 (4)
Reported As
Symbol Synonym
Name Synonyms
Secondary FlyBase IDs
    References (3)