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FB2025_05,released December 11, 2025
FlyBase in AWS Open Data
FlyBase NIH Grant Terminated
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FB2025_05,released December 11, 2025
Allele: Dmel\Pp1-87B1
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General Information
Symbol
Dmel\Pp1-87B1
Species
D. melanogaster
Name
FlyBase ID
FBal0013933
Feature type
allele
Associated gene
Associated Insertion(s)
Carried in Construct
Also Known As
PP1α87B1, Su(var)3-601, Su(var)3-61, Su-var(3)601
Key Links
Genomic Maps

Nature of the Allele
Progenitor genotype
Cytology

Polytene chromosomes normal.

Description

Amino acid replacement: G220S.

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

G12425031A

Amino acid change:

G220S | Pp1-87B-PA

Reported amino acid change:

G220S

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

Pp1-87B1 heterozygous embryos appear wild-type and hatch normally.

Pp1-87B1/Pp1-87B87Bg-3 animals die during pupariation, and until pupariation, do not lag behind in development compared to their control siblings.

Homozygotes and heterozygotes show no muscle detachment or indirect flight muscle phenotypes.

Suppresses the position effect variegation at thew locus caused byIn(1)wm4 and suppresses the position effect variegation at thebw locus caused byIn(2R)bwVDe2 andByron. Also suppresses the position effect variegation ofw seen in theP{wAR}41A insertion.

Strong suppressor levels of position effect vareigation and normal mitosis in neuroblasts or ganglion mother cells.

Dominant suppressor of position effect variegation at thew locus caused byIn(1)wm4h.

shows some reduction in viability in trans heterozygotes with some alleles of l(3)87Bg; in one case a clear maternal effect is noted.

External Data
Interactions
Show genetic interaction network for Enhancers & Suppressors
Phenotypic Class
Suppressed by
NOT suppressed by
Statement
Reference
Enhancer of
Statement
Reference

Pp1-87B1 is an enhancer ofvisible phenotype ofRetMEN2B.GMR

Pp1-87B1 is an enhancer ofvisible phenotype ofRetGMR.PR

Pp1-87B[+]/Pp1-87B1 is an enhancer ofvisible phenotype ofScer\GAL4vg.PM,putUAS.cMa

NOT Enhancer of
Statement
Reference

Pp1-87B1 is a non-enhancer ofvisible phenotype ofRetMEN2A.GMR

Suppressor of
Statement
Reference

Pp1-87B[+]/Pp1-87B1 is a suppressor |partially ofvisible |homeotic phenotype oftrxE2/trx1

Pp1-87B[+]/Pp1-87B1 is a suppressor |partially ofvisible |homeotic phenotype oftrxB11/trx1

NOT Suppressor of
Statement
Reference

Pp1-87B1 is a non-suppressor ofvisible phenotype ofRetMEN2A.GMR

Other
Phenotype Manifest In
Enhancer of
NOT Enhancer of
Statement
Reference

Pp1-87B1 is a non-enhancer ofeye phenotype ofRetMEN2A.GMR

Suppressor of
Statement
Reference

Pp1-87B[+]/Pp1-87B1 is a suppressor |partially ofhaltere |ectopic phenotype oftrxB11/trx1

Pp1-87B[+]/Pp1-87B1 is a suppressor |partially ofwing phenotype oftrxE2/trx1

Pp1-87B[+]/Pp1-87B1 is a suppressor |partially ofhaltere |ectopic phenotype oftrxE2/trx1

Pp1-87B[+]/Pp1-87B1 is a suppressor |partially ofwing phenotype oftrxB11/trx1

NOT Suppressor of
Statement
Reference

Pp1-87B1 is a non-suppressor ofeye phenotype ofRetMEN2A.GMR

Other
Additional Comments
Genetic Interactions
Statement
Reference

Embryos laid by flies heterozygous formars1 andPp1-87B1 show a significantly reduced hatch ratio.

Pp1-87B1/Pp1-87B87Bg-3Pp1α-96A2/Pp1α-96A2 double mutant animals die slightly earlier thanPp1-87B1/Pp1-87B87Bg-3 single mutants and pupariate 1-2 days later than their siblings.

Expression ofNop17lScer\UAS.T:Zzzz\His6,T:Hsap\MYC under the control ofScer\GAL4Bx-MS1096 inPp1-87B1/+ wings results in severely crumpled and reduced wings.

The modest wing overgrowth phenotype caused by expression ofputScer\UAS.cMa under the control ofScer\GAL4vg.PM is enhanced byPp1-87B1/+.

Pp1-87B1 dominantly suppresses the transformation of wing to haltere seen intrx1/trxE2 flies; 31% show strong transformation, 39% show weak transformation and 30% show no transformation.

Pp1-87B1 dominantly suppresses the transformation of wing to haltere seen intrx1/trxB11 flies; 27% show strong transformation, 24% show weak transformation and 49% show no transformation.

Flies expressingNiPp1Scer\UAS.T:Avic\GFP-EGFP under the control ofScer\GAL4vg.PM which are also carryingPp1-87B1 have crumpled wings.

The effect of loss of one copy ofPp1-87B1 cannot be rescued by P element mediated transformation withSu(var)3-7.

Xenogenetic Interactions
Statement
Reference
Complementation and Rescue Data
Comments

The suppressor phenotype ofPp1-87B1 onIn(1)wm4h is rescued byPp1-87B+t5.8. The lethality ofPp1-87B1 is rescued byPp1-87B+t5.8.

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

Not suppressed byzip alleles.

Isolated as a suppressor of position effect variegation at thew locus in flies carryingIn(1)wm4h, and a dominant enhancer of position effect variegation,E(var)c1011.

External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (8)
References (30)

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