FB2025_01 , released February 20, 2025
Allele: Dmel\sina3
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General Information
Symbol
Dmel\sina3
Species
D. melanogaster
Name
FlyBase ID
FBal0015667
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Cytology
Description

Deletion of 308bp of sina coding region, from 1534 through to 1842bp. This brings valine 211 in frame with the sina open reading frame stop codon. The resulting sina3 protein is truncated, missing the 103 most C-terminal amino acids.

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

Deletion of 308 bp; coordinates determined from Figure 5B of FBrf0051381 and differ from the coordinates listed in Table 1.

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

adult abdominal segment 3 & chaeta (with sina2)

adult abdominal segment 3 & microchaeta (with sina2)

adult abdominal segment 3 & tormogen cell | supernumerary (with sina2)

adult abdominal segment 3 & trichogen cell | supernumerary (with sina2)

adult abdominal segment 4 & chaeta (with sina2)

adult abdominal segment 4 & microchaeta (with sina2)

adult abdominal segment 4 & tormogen cell | supernumerary (with sina2)

adult abdominal segment 4 & trichogen cell | supernumerary (with sina2)

mesothoracic tergum & chaeta (with sina2)

mesothoracic tergum & microchaeta (with sina2)

mesothoracic tergum & tormogen cell | supernumerary (with sina2)

mesothoracic tergum & trichogen cell | supernumerary (with sina2)

Detailed Description
Statement
Reference

sina3/sinaA4 and sina3/Df(3L)sinaSH transheterozygotes exhibit frequent X-chromosome and 4[[th]]-chromosome non-disjunction, as well as defects in synaptonemal complex assembly during oogenesis, with components forming abnormal polycomplexes, which are observed in both oocytes and nurse cells by stage 2.

sina3/Df(3L)sinaSH transheterozygotes exhibit defects in synaptonemal complex assembly during oogenesis, with components forming abnormal polycomplexes

sina3 homozygous clones in the adult midgut virtually lack enteroendocrine cells, unlike the expected 6-8% in control clones, but exhibit a similar number of cells as compared to controls.

The number of pale-type R8 cells is dramatically reduced in the eyes of sina2/sina3 animals.

sina2/sina3 lack R7 photoreceptors.

Mutants show a double- bristle phenotype.

41% of the notal microchaetae and 62% of the microchaetae on abdominal segments 3 and 4 are missing in sina2/sina3 flies. 17.2% of bristles on the notum are duplicated, having 2 hairs emerging from 2 sockets or a fused socket. 44.5% of bristles on abdominal segments 3 and 4 are duplicated (2 hairs/2 sockets) and 20.9% show other defects (including 1 hair surrounded by 2-3 sockets, and 2 socket or 4 socket clusters without shafts). Embryonic development, including development of the es organs, is normal in sina2/sina3 animals.

sina2/sina3 mutants show missing R7 cells in 90% of the ommatidia. The external morphology of the eye shows a slight roughness.

Homozygotes lack R7 photoreceptor cells. This phenotype is unaltered if the flies also carry aoppok-1. R7-like cells are produced in sina3 Df(3R)E40/sina3 + flies.

Amorph based on the phenotypes of hemizygous <up>sina1/Df(3L)st-g18</up> versus that of homozygous flies.

This allele probably represents complete loss of function of the sina gene. In the ommatidia the R7 photoreceptor cell is always missing, the R7 precursor adopting a cone cell fate, and sometimes one or two cells of the R1-R6 class are missing as well. The normal trapezoidal arrangement of the R1-R6 cells is disorganised, and the R8 cell is often found in uncharacteristic positions. Other adult sensory organs are also affected: sensory bristles distributed over the body surface are frequently missing, with neither the cuticular bristle sheath nor the socket being present, affected sensory organs including the microchaetae and macrochaetae of the head, notum, abdomen and wing margin, and the stout and slender bristles of the anterior wing margin. The phenotype is most severe with bristles located on the abdomen, where often only a minor fraction of the normal number of bristles are present. Also, many of the remaining bristles have two or three sheaths emerging from a single socket. There is also a 10-fold reduction in adult lifespan, and adult behaviour is generally lethargic and uncoordinated. Neither males nor females are fertile, although they produce morphologically normal sperm and eggs, respectively.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Enhanced by
Statement
Reference

sina3/sina2 has visible phenotype, enhanceable by msi1/msi1

sina3/sina2 has visible phenotype, enhanceable by phyl2/phyl[+]

sina3/sina2 has visible phenotype, enhanceable by phyl[+]/phyl2245

Suppressed by
Statement
Reference

sina3/sina2 has visible phenotype, suppressible by ttk[+]/ttkosn

Enhancer of
Statement
Reference

sina3/sina2 is an enhancer of visible | recessive phenotype of msi1

sina3/sina2 is an enhancer of visible phenotype of msi1

NOT Enhancer of
Statement
Reference

sina3 is a non-enhancer of visible phenotype of Pp2B-14Dact.GMR

Suppressor of
Statement
Reference

sina3 is a suppressor of visible phenotype of Src64BΔ540.hs.2sev

NOT Suppressor of
Statement
Reference

sina3 is a non-suppressor of visible phenotype of CanBGMR.PS, Pp2B-14Dact.GMR

sina3 is a non-suppressor of visible phenotype of Pp2B-14Dact.GMR

Phenotype Manifest In
Enhanced by
Statement
Reference

sina3/sina2 has adult abdominal segment 3 & chaeta phenotype, enhanceable by phyl2/phyl[+]

sina3/sina2 has adult abdominal segment 3 & microchaeta phenotype, enhanceable by phyl[+]/phyl2245

sina3/sina2 has adult abdominal segment 4 & microchaeta phenotype, enhanceable by phyl[+]/phyl2245

sina3/sina2 has mesothoracic tergum & chaeta phenotype, enhanceable by phyl[+]/phyl2245

sina3/sina2 has mesothoracic tergum & microchaeta phenotype, enhanceable by phyl[+]/phyl2245

sina3/sina2 has mesothoracic tergum & tormogen cell | supernumerary phenotype, enhanceable by phyl[+]/phyl2245

sina3/sina2 has mesothoracic tergum & trichogen cell | supernumerary phenotype, enhanceable by phyl[+]/phyl2245

sina3/sina2 has adult abdominal segment 3 & microchaeta phenotype, enhanceable by phyl2/phyl[+]

sina3/sina2 has adult abdominal segment 4 & chaeta phenotype, enhanceable by phyl2/phyl[+]

sina3/sina2 has adult abdominal segment 4 & microchaeta phenotype, enhanceable by phyl2/phyl[+]

sina3/sina2 has mesothoracic tergum & chaeta phenotype, enhanceable by phyl2/phyl[+]

sina3/sina2 has mesothoracic tergum & microchaeta phenotype, enhanceable by phyl2/phyl[+]

sina3/sina2 has mesothoracic tergum & tormogen cell | supernumerary phenotype, enhanceable by phyl2/phyl[+]

sina3/sina2 has mesothoracic tergum & trichogen cell | supernumerary phenotype, enhanceable by phyl2/phyl[+]

Suppressed by
Statement
Reference

sina3/sina2 has ommatidium phenotype, suppressible by edslH8/ed1X5

sina3/sina2 has adult abdominal segment 3 & trichogen cell | supernumerary phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has adult abdominal segment 4 & chaeta phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has adult abdominal segment 4 & microchaeta phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has adult abdominal segment 4 & tormogen cell | supernumerary phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has adult abdominal segment 4 & trichogen cell | supernumerary phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has mesothoracic tergum & chaeta phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has mesothoracic tergum & tormogen cell | supernumerary phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has mesothoracic tergum & trichogen cell | supernumerary phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has adult abdominal segment 3 & chaeta phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has adult abdominal segment 3 & microchaeta phenotype, suppressible by ttk[+]/ttkosn

sina3/sina2 has adult abdominal segment 3 & tormogen cell | supernumerary phenotype, suppressible by ttk[+]/ttkosn

msi1, sina3/sina2 has ommatidium phenotype, suppressible by ttkosn

msi1, sina3/sina2 has rhabdomere phenotype, suppressible by ttkosn

msi1, sina3/sina2 has cone cell phenotype, suppressible by ttkosn

sina3 has phenotype, suppressible by ttkosn

Enhancer of
Statement
Reference

sina3/sina2 is an enhancer of external sensory organ phenotype of msi1

sina3/sina2 is an enhancer of ommatidium phenotype of msi1

NOT Enhancer of
Statement
Reference

sina3 is a non-enhancer of eye phenotype of Pp2B-14Dact.GMR

sina3 is a non-enhancer of eye phenotype of CanBGMR.PS, Pp2B-14Dact.GMR

Suppressor of
Statement
Reference

sina3/sina2 is a suppressor of eye phenotype of phylGMR.PC

sina3 is a suppressor of phenotype of phylhs.sev

sina3 is a suppressor of eye phenotype of Src64BΔ540.hs.2sev

NOT Suppressor of
Statement
Reference

sina3 is a non-suppressor of eye phenotype of CanBGMR.PS, Pp2B-14Dact.GMR

sina3 is a non-suppressor of eye phenotype of Pp2B-14Dact.GMR

Other
Additional Comments
Genetic Interactions
Statement
Reference

Double mutants of sina2/sina3 with msi1 show a synergistic, not additive, eye phenotype. Ommatidial arrays are disturbed, eyes consequently roughened and ommatidia do not contain more than five rhabdomeres. Cone cell array is disturbed. 30% of the ommatidia of sina2 msi1 ttkosn/sina3 msi1 show the normal number and arrangement of photoreceptor cells. The cone cell defects of sina2 msi1/sina3 msi1 are also suppressed by ttkosn.

The phylGMR.PC eye phenotype is completely suppressed in a sina2/sina3 background; the eyes are normal, except for the lack of R7 photoreceptor cells due to the absence of sina function. sina2/sina3 flies carrying both phylGMR.PC and ttk88.GMR.T:Hsap\MYC have very disrupted eyes, similar to those of flies carrying ttk88.GMR.T:Hsap\MYC alone.

sina1/sina3; svp1.sev and sina1/sina3; svp2.sev flies differentiate neither normal nor ectopic R7 cells.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (3)
Notes on Origin
Discoverer
Comments
Comments

No interaction with P{sev-svp1} or P{sev-svp2} exists.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (3)
Reported As
Name Synonyms
Secondary FlyBase IDs
  • FBal0056160
References (27)