FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Allele: Dmel\psidin1
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General Information
Symbol
Dmel\psidin1
Species
D. melanogaster
Name
FlyBase ID
FBal0127967
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: K441term.

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

A20024521T

Amino acid change:

K441term | psidin-PA

Reported amino acid change:

K441term

Comment:

Site of nucleotide substitution 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

Homozygous olfactory receptor neuron (ORN) clones result in complete loss of the Or71a, Or88a, Or42a and Or46a-expressing ORNs and a mild reduction in cell number of the Or10a, Or47a, Or22a, Or47b, Or33c and Or59c ORNs.

Homozygous ORN clones result in defects in glomerulus targeting. Mutant Or47a-expressing ORNs frequently innervate a ventromedial glomerulus (in wild-type animals they target the dorsomedial DM3 glomerulus). Mutant Or59c ORNs show a strong mistargeting phenotype. Mutant Or92a ORNs show a mistargeting phenotype.

Wild-type Or59c, Or42a and Or47a ORNs project normally in a psidin1 background.

Neurons in primary neuron cultures derived from mutant embryos have significantly smaller lamellipodia and significantly longer neurites compared to wild-type controls.

psidin1 mutant larvae are unable to induce Def production.

psidin1/Df(3R)H15 mutants are equally deficient in the induction of Def whether the infection was with a Gram-negative or Gram-positive micro-organism.

psidin1/Df(3R)H15 mutants die after a prolonged third instar larval instar and develop melanotic masses two days after the normal time of pupariation. At this late time point, defects in the blood cells are detected, including necrotic and multinucleate cells. However, none of these defects are apparent at the early wandering stage. psidin1/Df(3R)H15 mutants melanise wound sites normally.

Mutant larvae show normal melanisation at a wound site in response to infection. Mutant larvae have a high frequency of melanotic tumours (penetrance of this phenotype is approximately 80%).

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Additional Comments
Genetic Interactions
Statement
Reference

Expression of tsrS3A.Scer\UAS under the control of Scer\GAL4Act.PU reduces the axon mistargeting phenotype seen in Or59c-expressing psidin1 olfactory receptor neuron (ORN) clones by 14%.

Expression of tsrS3E.Scer\UAS under the control of Scer\GAL4Act.PU increases the axon mistargeting phenotype seen in Or59c-expressing psidin1 ORN clones by 8%.

Or59c-expressing ORN clones which are mutant for psidin1 and which are also expressing LIMK1Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4Act.PU show mistargeting in 87% of cases.

Expression of either LIMK1JF02063 or LIMK1Scer\UAS.KI.T:Ivir\HA1 under the control of Scer\GAL4Act.PU significantly rescues the axon mistargeting phenotype seen in Or59c-expressing psidin1 ORN clones.

Expression of NAA20KK102646 under the control of Scer\GAL4Act.PU does not enhance the reduction in cell number and axon mistargeting defects seen in Or42a and Or59c ORNs homozygous for psidin1.

Xenogenetic Interactions
Statement
Reference

Expression of BacA\p35Scer\UAS.cUa under the control of Scer\GAL4Act.PU rescues the reduction in cell number but not the axon mistargeting phenotypes seen in psidin1 Or59c olfactory receptor neuron clones.

Complementation and Rescue Data
Comments

Expression of psidinScer\UAS.T:Ivir\HA1 under the control of Scer\GAL4Act.PU rescues the reduction in cell number and axon mistargeting phenotypes seen in psidin1 Or59c olfactory receptor neuron (ORN) clones.

Expression of psidinIG978.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4Act.PU fully rescues the cell loss phenotype seen in Or59c ORN clones which are homozygous for psidin1, but the axon targeting defects of these ORNs are only partially rescued.

Expression of psidinS678D.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4Act.PU fully rescues the axon targeting defects seen in Or59c ORN clones which are homozygous for psidin1, but the cell loss phenotype of these ORNs is not rescued.

Expression of psidinS678D.Scer\UAS.T:Ivir\HA1 under the control of Scer\GAL4Act.PU rescues the axon targeting defects and cell loss phenotypes seen in Or59c ORN clones which are homozygous for psidin1.

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

Selected as: a mutation that fails to induce expression of Ecol\lacZDpt.PR normally in response to infection.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (3)
Reported As
Name Synonyms
Secondary FlyBase IDs
    References (4)