FB2025_02 , released April 17, 2025
Allele: Dmel\HemC3-20
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General Information
Symbol
Dmel\HemC3-20
Species
D. melanogaster
Name
FlyBase ID
FBal0105158
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
ketteC3-020
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Cytology
Description

Amino acid replacement: W256term.

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

G22287221A

Amino acid change:

W256term | Hem-PA

Reported amino acid change:

W256term

Comment:

G to A nucleotide change at the second or third position of the Trp codon leads to a nonsense mutation. (exact site of mutation unspecified). Site of nucleic acid difference in mutant inferred by FlyBase based on reported amino acid change.

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

Approximately 8% of HemC3-20 mutant embryos display a duplication of the RP2 neuron in one hemisegment and have one missing in the contralateral segment.

HemJ4-48/HemC3-20 mutant embryos have a duplication of the RP2 neuron in one hemisegment and have one missing in the contralateral segment.

Approximately 9% of HemC3-20/Df(3L)ED230 mutant embryos display a duplication of the RP2 neuron in one hemisegment and have one missing in the contralateral segment.

In HemC3-20 homozygous embryos the segmental commissures of the ventral nerve cord are not separated into distinct axon bundles and instead appear fused.

Mutant embryos show fused commissures and disrupted longitudinal connectives. The midline glial cells migrate in an abnormal path; they migrate laterally away from the midline along the forming commissural bundles (in wild-type embryos the midline glial cells show a posterior-ward migration). In stage 16 embryos, the midline glial cells fail to intercalate between the segmental commissure and a fused commissure phenotype develops. In the dorsal epidermis, pronounced F-actin bundles are seen in homozygous embryos, which often have a wavy appearance. These pronounced bundles are not seen in wild-type embryos. HemΔ2-6/HemC3-20 animals almost never eclose. The axonal phenotype is more pronounced in HemΔ2-6/HemC3-20 larvae than in homozygous HemΔ2-6 larvae.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
NOT Suppressor of
Statement
Reference

Hem[+]/HemC3-20 is a non-suppressor of abnormal neuroanatomy | larval stage phenotype of Abl4/Abl1

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

Hem[+]/HemC3-20 is a non-suppressor of NMJ bouton | increased number phenotype of Abl4/Abl1

Additional Comments
Genetic Interactions
Statement
Reference

The increased bouton number per muscle area that is seen at the neuromuscular junction of Abl1/Abl4 larvae is not suppressed by HemC3-20/+.

The fusion of commissures in the ventral nerve cords of HemC3-20 embryos is significantly repressed by SCARunspecified/+, but is unaffected by homozygosity for WASp3.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Images (0)
Mutant
Wild-type
Stocks (1)
Notes on Origin
Discoverer
Comments
Comments

Allelic series based on mutant phenotype; HemC3-20 = HemJ4-48 > HemP168 > HemG1-37 > HemJ1-70.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (3)
Reported As
Symbol Synonym
Name Synonyms
Secondary FlyBase IDs
    References (5)