FB2025_01 , released February 20, 2025
Allele: Dmel\biomb-282
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General Information
Symbol
Dmel\biomb-282
Species
D. melanogaster
Name
FlyBase ID
FBal0030628
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
omb282, l(1)omb282
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Cytology
Description

Amino acid replacement: E347K.

A missense mutation approximately 19 residues into the T-box domain of bi.

Point mutation.

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

G4429473A

Amino acid change:

E347K | bi-PA; E347K | bi-PB; E347K | bi-PC; E347K | bi-PD; E347K | bi-PE; E347K | bi-PF; E347K | bi-PG

Reported amino acid change:

E347K

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

Partial deletions of posterior compartment structures are sometimes seen in the abdomens of biomb-282 adult hemizygotes. The third abdominal segment undergoes a mirror-image anterior duplication.

Hemizygous males lack segmental pigment stripes but retain pigment in segments A5 and A6.

Homozygous females cannot be obtained. In biomb-282/biomb-282 male pharate adults, the dorsal bristles of the claspers and the hypandrium bristles are absent. Also the hypandrium is devoid of hairs and the hypandrium fragma is reduced. The anal plates are usually somewhat enlarged in the ventral region and reduced in the dorsal areas.

Hemizygotes usually die at the late larval or early pupal stage, with a few animals surviving to the late pharate adult stage. The posterior tergite and posterior hairy zone (PHZ) are deleted in many hemisegments of these pharate adults, and are replaced with a mirror-image duplication of the anterior tergite. The three anterior rows of microchaetae are usually unaffected. A small number of hemitergites are completely missing. Some hemitergites have weaker phenotypes, including deletion of the PHZ, absence of the pigment band, abnormal trichome polarity in the PHZ and posterior tergite, and transformation of macrochaetae into microchaetae. Trichome polarity in the posterior sternite is reversed, and occasionally a few sternal bristles and neighbouring pleural trichomes are affected.

Dead homozygotes rescued from the pupal case exhibit deletion of the central region of the wing. biomb-Gal4/biomb-282 flies exhibit deletion of the central wing region. Mitotic clone induced in the wing anterior compartment causes deletion of cells in the distal region, more proximally mutant cells remain. Mitotic clone induced in the wing posterior compartment causes deletion of cells in the distal region, more proximally mutant cells remain.

Displays lac and rb phenotypes.

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

biomb-282 has visible phenotype, enhanceable by Df(3L)Scf-R11

Suppressor of
Statement
Reference

biomb-282 is a suppressor of visible | dominant phenotype of hhMir

Other
Statement
Reference
Phenotype Manifest In
Enhanced by
Statement
Reference

biomb-282 has wing phenotype, enhanceable by Df(3L)Scf-R11

Suppressor of
Statement
Reference

biomb-282 is a suppressor of abdominal tergite phenotype of hhMir

Other
Additional Comments
Genetic Interactions
Statement
Reference

The tergite and PHZ phenotypes of hhMir/+ flies are suppressed by biomb-282; in biomb-282; hhMir double mutants, both the normal and mirror-image duplicated PHZ and posterior tergite structures are missing and replaced with a mirror-image double anterior pattern similar to biomb-282 single mutants. However, all segments show double anterior patterning in the double mutants, whereas mirror-image duplications are only seen in a fraction of the segments in biomb-282 single mutants. biomb-282 does not suppress the formation of ectopic intersegmental membrane seen in hhMir/+ flies. The abdomen and wing phenotypes of biomb-282 homozygotes are strongly enhanced by Df(3L)Scf-R11. The frequency of complete anterior duplications in the abdominal tergites is strongly increased in biomb-282; ScfR10/ScfR10 flies compared to biomb-282; ScfR10/+ flies. In addition, the polarity of all sternal bristles is reversed in biomb-282; ScfR10/ScfR10 flies, whereas only a few, if any, are affected in biomb-282 single mutants.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments
Images (0)
Mutant
Wild-type
Stocks (0)
Notes on Origin
Discoverer
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (5)
References (12)