FB2024_03 , released June 25, 2024
Allele: Dmel\ocuvi
Open Close
General Information
Symbol
Dmel\ocuvi
Species
D. melanogaster
Name
UV-insensitive
FlyBase ID
FBal0050218
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
otduvi
Key Links
Mutagen
Nature of the Allele
Progenitor genotype
Cytology
Description

1.5kb deletion in intron 3.

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

Remodelling of the photoreceptor zona adherens occurs 60h after puparium formation (APF)in ocuvi mutants compared to 44 hours APF in wild type. Photoreceptors exhibit defective elongation along the lens to brain axis. Rhabdomere morphogenesis defects are also seen; on average 1.8 cells per ommatidium harbour a split rhabdomere and 1.2 cells lack a rhabdomere altogether. An increased number of stalk membranes are shorter than 2500nm compared to wild type.

Rhabdomeres are misshapen (they are often split and/or duplicated) and are restricted to the distal-most third of the retina in mutant flies. The organisation of the ommatidia is disrupted.

Rhabdomeres fail to extend more than one-third of the depth of the retina in mutant flies and are often misshapen or duplicated. Ommatidial organisation is disrupted.

The process of rhabdomere initiation has begun in mutant photoreceptor cells at 60 hours after puparium formation (APF), as in wild-type photoreceptors. However, the mutant photoreceptors show clear disorganisation of the initial stages of rhabdomere elaboration. At 72 hours APF, continuing defects in rhabdomere morphogenesis are seen. At 96 hours APF discernible rhabdomere structures are present, but they are smaller than normal and misshapen.

The rhabdomeres of the ocelli in mutant flies show little difference from those in wild-type controls.

The shape of the rhabdomeres of all eight photoreceptor cells is abnormal in ocuvi mutants.

Flies are preferentially attracted to visible light over UV light. Rhabdomeres are disorganised and often appear duplicated. The rhabdomere phenotype becomes progressively worse in more proximal sections, resulting in premature rhabdomere termination. The R8 photoreceptor is frequently abnormally localized. Heterozygotes with oc1 show neither an R-cell nor an ocellar phenotype.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Phenotype Manifest In
Enhanced by
Statement
Reference
Suppressed by
Statement
Reference
NOT suppressed by
Statement
Reference
Enhancer of
Statement
Reference
Other
Additional Comments
Genetic Interactions
Statement
Reference

Expression of Kr-h1GD4367 under the control of Scer\GAL4oc.1.6 partially suppresses the apical membrane maturation defects seen in ocuvi mutant photoreceptors. The photoreceptor elongation defects, rhabdomere loss and stalk membrane length are all also partially suppressed.

Expression of Kr-h1KK112003 under the control of Scer\GAL4oc.1.6 partially suppresses the apical membrane maturation defects seen in ocuvi mutant photoreceptors.

The process of rhabdomere initiation has begun in photoreceptor cells at 60 hours after puparium formation (APF) in ocuvi ; Pph13hazy double mutants, as in wild-type photoreceptors. However, the mutant photoreceptors show clear disorganisation of the initial stages of rhabdomere elaboration. At 72 hours APF the defects in rhabdomere morphogenesis in the double mutant are more severe than in either single mutant; the apical rhabdomeric membrane lacks any definable shape and organisation in the double mutant. By 96 hours APF no rhabdomere is recognisable in the double mutants. Instead, there is a region of apical membrane that extends out into the inter-rhabdomeral space in distal portions of the retina, but this membrane lacks any organised structure. This membrane structure is visible along the entire length of the photoreceptor cell. No photoreceptor cell structures can be discerned beyond approximately 20μm from the surface of the retina, compared with 100μm for a wild-type photoreceptor cell.

ocuvi ; Pph13hazy double mutants lack rhabdomeres in the ocelli photoreceptor cells.

Xenogenetic Interactions
Statement
Reference

Expression of Hsap\OTX1Scer\UAS.T:Zzzz\FLAG or Hsap\OTX2Scer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4oc.1.6 rescues rhabdomere elongation in ocuvi flies (so that the rhabdomeres extend the entire depth of the retina in the rescued animals). However, misshapen rhabdomeres are seen in the rescued flies and ommatidia are frequently disorganised.

Expression of Hsap\CRXScer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4oc.1.6 rescues rhabdomere elongation in ocuvi flies (so that the rhabdomeres extend the entire depth of the retina in the rescued animals). Almost all ommatidia form well-organised trapezoids.

Expression of Hsap\CRXK88N.Scer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4oc.1.6 does not rescue rhabdomere or ommatidial morphology in ocuvi flies.

Expression of either Hsap\CRXR90W.Scer\UAS.T:Zzzz\FLAG or Hsap\CRXI138fs48.Scer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4oc.1.6 largely rescues rhabdomere and ommatidial morphology in ocuvi flies.

Expression of Hsap\CRXE80A.Scer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4oc.1.6 partially rescues rhabdomere and ommatidial morphology in ocuvi flies.

Complementation and Rescue Data
Comments

Expression of ocScer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4oc.1.6 rescues rhabdomere elongation in ocuvi flies (so that the rhabdomeres extend the entire depth of the retina in the rescued animals). The rescued rhabdomeres have normal morphology and ommatidial organisation is wild type.

Expression of ocScer\UAS.FL or ocΔN.Scer\UAS under the control of Scer\GAL4oc.1.6 rescues rhabdomere elongation and ommatidial organisation in ocuvi flies.

Expression of either ocΔC.Scer\UAS, ocΔNC.Scer\UAS, ocΔA.Scer\UAS, ocΔB.Scer\UAS, ocΔAB.Scer\UAS or ocΔABC.Scer\UAS under the control of Scer\GAL4oc.1.6 partially rescues rhabdomere elongation and ommatidial organisation in ocuvi flies.

Expression of ocHD.Scer\UAS under the control of Scer\GAL4oc.1.6 weakly rescues rhabdomere elongation and ommatidial organisation in ocuvi flies.

Almost complete rescue of ocuvi phenotypes is seen after five successive heat shocks before 48 hours after puparium formation (APF). The rhabdomeres appear normal in shape and are not split. Heat shocks later than 48 hours APF fail to rescue the rhabdomeric defects.

Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (6)
References (16)