FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\cnksag13L
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General Information
Symbol
Dmel\cnksag13L
Species
D. melanogaster
Name
FlyBase ID
FBal0095220
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Cytology
Description

Amino acid replacement: Q1156term.

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

C17415781T

Amino acid change:

Q1156term | cnk-PA; Q1156term | cnk-PB

Reported amino acid change:

Q1156term

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

cnksag13L/Df(2R)BSC161 embryos derived from mothers bearing cnksag13L mutant germline clones and thus lacking both maternal and zygotic cnk show a complete loss of muscle founder cells at stage 11/12.

cnksag13L/cnksag32-3;cnkfTRG1248 rescue flies survive to adulthood but display rough eye phenotype.

Mutants die as late pupae with small rough eyes. Mutants contain only about 50% of the normal number of ommatidia. Third instar larval eye discs are smaller in size. In these discs the first mitotic wave is unaffected, but there is an approximately 50-50% reduction of the number of mitotic cells in the second mitotic wave. sagX-10/sag13L animals are viable but have rough eyes due to disorganised ommatidial arrays and reduced numbers of photoreceptor cells. 19% of sagX-10/sag13L ommatidia lack R7 cells. In sag13L mutant eye discs, photoreceptor cells R1, R6 and R7 are missing in ommatidial preclusters. The numbers of cone and pigment cells are also dramatically reduced but not eliminated. Many ommatidia contain only one cone cell wrapped around by one primary pigment cell. The number of secondary and tertiary pigment cells are also reduced. The remaining cone and pigment cells vary in numbers from one ommatidium to the next. Within homozygous sag13L somatic clones in the eye, ommatidia lack the inner R7, and photoreceptors R1 and R6. Photoreceptors R2 - R5 although present, are smaller than wild-type. The mutant cells lack the pigment granules that are present in wild-type cells at the base of the rhabdomeres. In addition, the mutant photoreceptors form smaller rhabdomeres compared to wild-type.

Homozygotes die at the late pupal stage. Pharate adults have rough eyes with only approximately 50% of the normal number of ommatidia. The ommatidia are disorganised and 2 to 3 photoreceptor cells per ommatidium are missing. Degeneration of photoreceptor cells is seen. Third instar larval eye discs are smaller than wild-type. No wild-type ommatidia are found within homozygous clones in the eye; 75% lack the R7 cell and 94% lack 1 to 3 outer photoreceptors. No degeneration of the mutant photoreceptor cells is seen.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Enhancer of
Statement
Reference

cnksag13L/sag[+] is an enhancer of visible phenotype of rl13R/rl1

cnksag13L/sag[+] is an enhancer of lethal | recessive phenotype of Raf12

NOT Suppressor of
Statement
Reference

cnksag13L/Src42ASu(Raf)1-1 is a non-suppressor of lethal phenotype of Raf1

Other
Statement
Reference
Phenotype Manifest In
NOT Enhanced by
Suppressed by
NOT suppressed by
Enhancer of
Statement
Reference

cnksag13L/sag[+] is an enhancer of photoreceptor cell R7 phenotype of Ras85DN17.sev

cnksag13L is an enhancer of ommatidium phenotype of SosJC2, sev6

cnksag13L/sag[+] is an enhancer of eye phenotype of rl13R/rl1

Suppressor of
Statement
Reference

cnksag13L/sag[+] is a suppressor of phenotype of Dsor1Su34B

cnksag13L/sag[+] is a suppressor of photoreceptor neuron phenotype of Ras85DV12.sev

cnksag13L/sag[+] is a suppressor of photoreceptor cell R7 | ectopic phenotype of Ras85DV12.sev

cnksag13L/sag[+] is a suppressor of phenotype of Src42ASu(Raf)1-1

cnksag13L/sag[+] is a suppressor of phenotype of Su(Raf)43B43B

Other
Statement
Reference
Additional Comments
Genetic Interactions
Statement
Reference

In Ras85DV12.sev;sag13L double mutant somatic clones, exhibits an ommatidial phenotype no different from the phenotype seen in sag13L clones. In sagX-10/sag13L; rlD334N.hs.sev flies, 99% of ommatidia contain one R7 cell. In 90% of aopyan-1/aopyan-1, sag13L/+ double mutant clones in the eye, there are the normal complement of photoreceptor cells.

Dominantly suppresses the ability of Src42ASu(phl)1-1, Su(Raf)43B43B or Dsor1Su34B to suppress the lethality of phl1/Y flies. Dominantly enhances the eye phenotype of rl1/rl13R flies. rl41-1 sag13L double heterozygotes have disorganised ommatidia, although the eyes of either single heterozygote are normal. Dominantly suppresses the extra R7 photoreceptor cell phenotype of flies carrying Ras85DV12.sev. Dominantly enhances the lethality of phl12.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments

The lethality of either cnk14C/Df(2R)BSC161 or cnksag13L/cnksag32-3 mutants (but not cnksag13L or cnksag32-3 homozygotes) is rescued by combination with cnkfTRG1248 but the adult cnksag13L/cnksag32-3;cnkfTRG1248 rescue flies display rough eye phenotype.

Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer

Selected as: a mutation that dominantly suppresses the ability of Src42ASu(phl)1-1 to suppress the lethality of phl1/Y flies. Isolation: derived from the 'SuSu(Raf)113 chromosome (which dominantly suppresses the ability of Src42ASu(phl)1-1 to suppress the lethality of phl1/Y flies) which contained two mutations; sag13L and rl13R. When separated by recombination, sag13L showed all the suppressor of Src42ASu(phl)1-1 activity, and rl13R showed no suppressor of Src42ASu(phl)1-1 activity.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (2)
Reported As
Symbol Synonym
Name Synonyms
Secondary FlyBase IDs
    References (3)