FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\NAx-59d
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General Information
Symbol
Dmel\NAx-59d
Species
D. melanogaster
Name
FlyBase ID
FBal0012854
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
Ax59d, Ax59d5
Key Links
Mutagen
Nature of the Allele
Mutagen
Progenitor genotype
Cytology
Description

Carries a mutation in the 24th EGF like repeat of the extracellular domain of N.

Point mutation in EGF repeat 24.

Amino acid replacement: C972S. C972 falls in EGF repeat number 24.

Nucleotide substitution: GT replaced by ATATA.

Mutation replaces the single cysteine at amino acid postition 972 with two residues, tyrosine and serine (C972YS).

Mutant partially sequenced; correlated with single amino acid replacements within six adjacent EGF-homologous elements of the N protein; has Gly at residue 2057 characteristic of Oregon R rather than Ser of Canton S (FBrf0045770).

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 clones (in a Minute background) carry few if any sensory macrochaetae, but macrochaetae can develop along the clone border. Wing vein gaps homozygous for NAx-59d (marked with ctunspecified) are significantly longer than the gaps in the veins of the opposite wing.

Fast growing clones carry few if any sensory macrochaetae, though macrochaetae can develop along clone borders. Wing vein gaps homozygous for NAx-59d are significantly longer than the gaps in the veins of the opposite wing. Wing vein gaps extend slightly longer on the dorsal surface than on the ventral surface of the wing.

In NAx-59d wing discs, those proneural clusters fated to become the scutellar and dorsocentral bristles have fewer cells than wild-type. Those proneural clusters fated to become the anterior postalar and the posterior supralar bristles have a similar number of cells as wild-type.

NAx-59d/Df(1)N-81k1 animals die as pharate adults with an extreme Abruptex phenotype. Heterozygotes appear wild-type.

Mutants lack bristles in the wing and notum. Wing margins contain fewer bristles than normal, a phenotype also characteristic of wg mutants.

The Abruptex phenotype of heteroallelic combinations with viable Abruptex alleles is reduced at 29oC as compared to 25oC.

Mutations of mam, bib and neur in an heterozygous condition had no effect on the expression of NAx-59d or NAx-59b except when coupled in cis with Nfa-g. The neurogenic mutations suppress the wing venation phenotype of N.

Adult wing exhibit missing veins and removal of virtually all micro and macrochaetae on the thorax. Wing phenotype can be suppressed by vg and sca mutations.

Expression was suppressed by Dl mutations and enhanced by E(spl) and H mutations.

Lethal in combination with Nl1N-ts1 at 29oC, 10% of NAx-59d/NAx-tsl flies survive and have an abruptex phenotype at 29oC.

Developmental studies of Young have shown that NAx-59d is a larval lethal (Kelley, Kidd, Deutsch and Young, 1987). NAx-59d placed between spl and NCo (Welshons).

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
NOT Enhanced by
Statement
Reference

NAx-59d has phenotype, non-enhanceable by Su(H)2

NOT suppressed by
Statement
Reference

NAx-59d has phenotype, non-suppressible by Su(H)2

Other
Additional Comments
Genetic Interactions
Statement
Reference

The addition of Su(H)2 has no effect on the NAx-59d proneural cluster phenotypes.

NAx-59d ; wgS107 double heterozygotes have a reduced number of thoracic bristles compared to wild-type. NAx-59d ; Df(3R)Dl-FX3 double heterozygotes have an increased number of thoracic bristles compared to wild-type.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer

Green.

Comments
Comments

Phenotype partially suppressed in NAx-59d/+/+. Interacts with some wg alleles.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (3)
References (20)