FB2026_02 , released June 18, 2026
Allele: Dmel\Cerk1
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General Information
Symbol
Dmel\Cerk1
Species
D. melanogaster
Name
FlyBase ID
FBal0241656
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
dcerk1
Key Links
Allele class
Nature of the Allele
Allele class
Associated Insertion(s)
Cytology
Description

Imprecise excision of the progenitor insertion, leaving approximately 6kb of the original insertion in place. This results in a significant reduction in transcript levels compared to wild type.

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

Homozygous Cerk1 mutants are viable and have decreased fertility.

Mutant adults show progressive light induced degeneration of the rhabdomeres; rhabdomeres are seen in 1 day-old flies, but 5- and 17-day old flies have hardly any rhabdomeres and show extensive vacuolation of the photoreceptors.

Mutants show fertility defects.

5-day old mutant adults show severe photoreceptor degeneration; the cells appear vacuolated with almost no intact rhabdomeres. This degeneration phenotype is light-dependent as it is not seen in flies raised in the dark.

Mutant flies raised in the dark do not respond to light stimulus when assayed by electroretinogram recordings.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Suppressed by
Statement
Reference

Cerk1 has viable phenotype, suppressible by bwaunspecified/bwa[+]

NOT suppressed by
Statement
Reference

Cerk1 has abnormal neurophysiology phenotype, non-suppressible by Prosβ61

Phenotype Manifest In
Suppressed by
Statement
Reference
NOT suppressed by
Statement
Reference

Cerk1 has rhabdomere phenotype, non-suppressible by Prosβ61

Cerk1 has eye photoreceptor cell phenotype, non-suppressible by Prosβ61

Additional Comments
Genetic Interactions
Statement
Reference

Introduction of bwaunspecified into a Cerk1 mutant background results in lethality.

Expression of CDaseScer\UAS.cAa under the control of Scer\GAL4GMR.PF rescues the lack of a light-induced electroretinogram response seen in Cerk1 flies. The light-induced retinal degeneration that is seen in Cerk1 flies is also rescued by expression of CDaseScer\UAS.cAa under the control of Scer\GAL4GMR.PF.

Pros261 cannot rescue the lack of a light-induced electroretinogram response and the retinal degeneration that is seen in Cerk1 flies.

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 (2)
Reported As
Name Synonyms
Secondary FlyBase IDs
    References (3)