The gene prune is referred to in FlyBase by the symbol Dmel\pn (CG3461, FBgn0003116). It is a protein_coding_gene from Drosophila melanogaster. An electronic pipeline based on InterPro domains suggests that it has the molecular function: manganese ion binding; pyrophosphatase activity. There is experimental evidence that it is involved in the biological process: compound eye pigmentation. 106 alleles are reported. The phenotype of these alleles is annotated with: pigment cell. It has one annotated transcript and one annotated polypeptide. Protein features are: DHHA2; Phosphoesterase, RecJ-like. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of moderately high expression to a trough of low expression. Peak expression observed within 00-06 hour embryonic stages. Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: virgin spermatheca. Expression at moderate levels in the following post-embryonic organs or tissues: adult head, adult eye, adult thoracico-abdominal ganglion, adult heart, larval/adult fat body, adult female reproductive system, adult carcass. Comments on Affy2 ProbeSet: ProbeSet 1637479_at completely aligns to an exonic region of the only FlyBase-annotated transcript isoform of pn. Gene sequence location is X:2075127..2076949.
User Contributed Data
Phenotypic Description from the Red Book (Lindsley
& Zimm 1992)
Gene/Allele symbols may differ
from current usage
pn: prune
Eye color of newly emerged flies transparent brownish red, becoming brownish purple with age. The eyes of pn
males have about 25% as much drosopterin (red pigment) as the
eyes of wild-type males (Gearhart and MacIntyre, 1970, Anal.
Biochem. 37: 21-25); the concentrations of xanthopterin and
sepiapterin (brown pigments) are increased to about 110% of
wild-type (Nolte, 1959). Control of drosopterin synthesis
seems to be related to the activity of the enzyme GTP cyclohydrolase (Evans and Howell, 1979, Biochem. Genet. 16: 13-26).
The pn eye color is autonomous in larval optic disks transplanted into wild-type hosts (Beadle and Ephrussi, 1936).
Larval Malpighian tube color is normal (Brehme and Demerec,
1942, Growth 6: 351-56).
Standard pn mutants are homo- and hemizygous viable in a
wild-type background, but show a lethal interaction with the
third chromosome dominant awkK (Lifschytz and Falk, 1969;
Orevi, 1973, DIS 50: 77). Some temperature-sensitive pn
mutants (pnts-e), however, are insensitive to the
killing action of awkK; one
temperature-sensitive mutant (pnts-ek) is insensitive to awkK
at permissive temperatures (18, 22), but sensitive to awkK at
restrictive temperatures (25, 29) (Orevi, 1973, DIS 50: 80;
Orevi and Falk, 1975). The TSP for the eye color phenotype
occurs during the late pupal stage, while the TSP for the pn
component of the pn-awkK interaction begins at the late pupal
stage and lasts until eclosion (Orevi and Falk, 1975). Homo- and hemizygous pn deficiencies and other chromosomal rearrangements have been induced by Ilyina et al. (1980), as indicated in the allele table.
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A developmental western blot representing embryonic, larval, pupal and adult stages reveals that pn protein is present in all stages, with highest levels in pupae and adults, and lowest levels in mid-third instar larvae.
Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: virgin spermatheca. Expression at moderate levels in the following post-embryonic organs or tissues: adult head, adult eye, adult thoracico-abdominal ganglion, adult heart, larval/adult fat body, adult female reproductive system, adult carcass.
[download data (TSV)]
Guide to FlyAtlas expression level colors
No expression (0 - 9.999)
Low expression (10 - 99.999)
Moderate expression (100 - 499.999)
High level expression (500 - 999.999)
Very high expression (>999.999)
Linear, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
49.2
Larval Midgut
43.9
Larval Hindgut
42.6
Larval Malpighian Tubules
64.6
Larval Fat Body
117.7
Larval Salivary Gland
32.3
Larval Trachea
34.125
Larval Carcass
45.275
Adult Head
108.4
Adult Eye
173.425
Adult Brain
93.4
Adult Thoracic-Abdominal Ganglion
117.6
Adult Crop
45.5
Adult Midgut
59.6
Adult Hindgut
35.4
Adult Malpighian Tubules
89.6
Adult Fat Body
414.1
Adult Salivary Gland
62.4
Adult Heart
208.85
Adult VirginFemale Spermatheca
535.6
Adult InseminatedFemale Spermatheca
337.9
Adult Ovary
102.7
Adult Testis
59
Adult Male Accessory Gland
48.4
Adult Carcass
185
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
49.2
Larval Midgut
43.9
Larval Hindgut
42.6
Larval Malpighian Tubules
64.6
Larval Fat Body
117.7
Larval Salivary Gland
32.3
Larval Trachea
34.125
Larval Carcass
45.275
Adult Head
108.4
Adult Eye
173.425
Adult Brain
93.4
Adult Thoracic-Abdominal Ganglion
117.6
Adult Crop
45.5
Adult Midgut
59.6
Adult Hindgut
35.4
Adult Malpighian Tubules
89.6
Adult Fat Body
414.1
Adult Salivary Gland
62.4
Adult Heart
208.85
Adult VirginFemale Spermatheca
535.6
Adult InseminatedFemale Spermatheca
337.9
Adult Ovary
102.7
Adult Testis
59
Adult Male Accessory Gland
48.4
Adult Carcass
185
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
49.2
Larval Midgut
43.9
Larval Hindgut
42.6
Larval Malpighian Tubules
64.6
Larval Fat Body
117.7
Larval Salivary Gland
32.3
Larval Trachea
34.125
Larval Carcass
45.275
Adult Head
108.4
Adult Eye
173.425
Adult Brain
93.4
Adult Thoracic-Abdominal Ganglion
117.6
Adult Crop
45.5
Adult Midgut
59.6
Adult Hindgut
35.4
Adult Malpighian Tubules
89.6
Adult Fat Body
414.1
Adult Salivary Gland
62.4
Adult Heart
208.85
Adult VirginFemale Spermatheca
535.6
Adult InseminatedFemale Spermatheca
337.9
Adult Ovary
102.7
Adult Testis
59
Adult Male Accessory Gland
48.4
Adult Carcass
185
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
49.2
Larval Midgut
43.9
Larval Hindgut
42.6
Larval Malpighian Tubules
64.6
Larval Fat Body
117.7
Larval Salivary Gland
32.3
Larval Trachea
34.125
Larval Carcass
45.275
Adult Head
108.4
Adult Eye
173.425
Adult Brain
93.4
Adult Thoracic-Abdominal Ganglion
117.6
Adult Crop
45.5
Adult Midgut
59.6
Adult Hindgut
35.4
Adult Malpighian Tubules
89.6
Adult Fat Body
414.1
Adult Salivary Gland
62.4
Adult Heart
208.85
Adult VirginFemale Spermatheca
535.6
Adult InseminatedFemale Spermatheca
337.9
Adult Ovary
102.7
Adult Testis
59
Adult Male Accessory Gland
48.4
Adult Carcass
185
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
49.2
Larval Midgut
43.9
Larval Hindgut
42.6
Larval Malpighian Tubules
64.6
Larval Fat Body
117.7
Larval Salivary Gland
32.3
Larval Trachea
34.125
Larval Carcass
45.275
Adult Head
108.4
Adult Eye
173.425
Adult Brain
93.4
Adult Thoracic-Abdominal Ganglion
117.6
Adult Crop
45.5
Adult Midgut
59.6
Adult Hindgut
35.4
Adult Malpighian Tubules
89.6
Adult Fat Body
414.1
Adult Salivary Gland
62.4
Adult Heart
208.85
Adult VirginFemale Spermatheca
535.6
Adult InseminatedFemale Spermatheca
337.9
Adult Ovary
102.7
Adult Testis
59
Adult Male Accessory Gland
48.4
Adult Carcass
185
Expression Level Scale
None
Low
Moderate
High
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
49.2
Larval Midgut
43.9
Larval Hindgut
42.6
Larval Malpighian Tubules
64.6
Larval Fat Body
117.7
Larval Salivary Gland
32.3
Larval Trachea
34.125
Larval Carcass
45.275
Adult Head
108.4
Adult Eye
173.425
Adult Brain
93.4
Adult Thoracic-Abdominal Ganglion
117.6
Adult Crop
45.5
Adult Midgut
59.6
Adult Hindgut
35.4
Adult Malpighian Tubules
89.6
Adult Fat Body
414.1
Adult Salivary Gland
62.4
Adult Heart
208.85
Adult VirginFemale Spermatheca
535.6
Adult InseminatedFemale Spermatheca
337.9
Adult Ovary
102.7
Adult Testis
59
Adult Male Accessory Gland
48.4
Adult Carcass
185
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
49.2
Larval Midgut
43.9
Larval Hindgut
42.6
Larval Malpighian Tubules
64.6
Larval Fat Body
117.7
Larval Salivary Gland
32.3
Larval Trachea
34.125
Larval Carcass
45.275
Adult Head
108.4
Adult Eye
173.425
Adult Brain
93.4
Adult Thoracic-Abdominal Ganglion
117.6
Adult Crop
45.5
Adult Midgut
59.6
Adult Hindgut
35.4
Adult Malpighian Tubules
89.6
Adult Fat Body
414.1
Adult Salivary Gland
62.4
Adult Heart
208.85
Adult VirginFemale Spermatheca
535.6
Adult InseminatedFemale Spermatheca
337.9
Adult Ovary
102.7
Adult Testis
59
Adult Male Accessory Gland
48.4
Adult Carcass
185
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
49.2
Larval Midgut
43.9
Larval Hindgut
42.6
Larval Malpighian Tubules
64.6
Larval Fat Body
117.7
Larval Salivary Gland
32.3
Larval Trachea
34.125
Larval Carcass
45.275
Adult Head
108.4
Adult Eye
173.425
Adult Brain
93.4
Adult Thoracic-Abdominal Ganglion
117.6
Adult Crop
45.5
Adult Midgut
59.6
Adult Hindgut
35.4
Adult Malpighian Tubules
89.6
Adult Fat Body
414.1
Adult Salivary Gland
62.4
Adult Heart
208.85
Adult VirginFemale Spermatheca
535.6
Adult InseminatedFemale Spermatheca
337.9
Adult Ovary
102.7
Adult Testis
59
Adult Male Accessory Gland
48.4
Adult Carcass
185
Expression Level Scale
None
Low
Moderate
High
Very high
Heatmap
Tissue
Expression Level
Larval Central Nervous System
Larval Midgut
Larval Hindgut
Larval Malpighian Tubules
Larval Fat Body
Larval Salivary Gland
Larval Trachea
Larval Carcass
Adult Head
Adult Eye
Adult Brain
Adult Thoracic-Abdominal Ganglion
Adult Crop
Adult Midgut
Adult Hindgut
Adult Malpighian Tubules
Adult Fat Body
Adult Salivary Gland
Adult Heart
Adult VirginFemale Spermatheca
Adult InseminatedFemale Spermatheca
Adult Ovary
Adult Testis
Adult Male Accessory Gland
Adult Carcass
FlyAtlas Organ/Tissue Expression, larval vs. adult
Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of moderately high expression to a trough of low expression. Peak expression observed within 00-06 hour embryonic stages.
[download data (TSV)]
Please Note FlyBase no
longer curates genomic clone accessions so this list
may not be complete
cDNA Clones ( 21 )
Please Note
This section lists
cDNAs and ESTs that fall within the genomic extent
of the gene model, which may include cDNAs and ESTs
of genes within introns, or of overlapping genes.
Please see GBrowse for alignment of the cDNAs and ESTs
to the gene model.
Shows particularly robust cycling of transcription in adult heads, as assessed by expression analysis using high density oligonucleotide arrays with probe generated during three 12-point time course experiments over the course of 6 days.
In a sample of 79 genes with multiple introns, 33 showed significant heterogeneity in G+C content among introns of the same gene and significant positive correspondence between the intron and the third codon position G+C content within genes. These results are consistent with selection adding against preferred codons at the start of genes.
To understand the function of pn the nucleotide sequence of a pn cDNA and pn genomic DNA have been determined. Verification that the cDNA encodes a functional pn product is demonstrated by rescue of both the pn eye phenotype and the pn/awdK interaction.
pn shows a lethal interaction with awdK: a small number of larvae reach second instar. A maternal effect can shift the phenocritical period for one larval stage. This effect is temperature sensitive: low temperature, more larvae reach third instar. The perineurium, glia and lymph gland are the main cellular targets of the pn/awdK interaction.
Eye color of newly emerged flies transparent brownish red, becoming brownish purple with age. The eyes of pn1 males have about 25% as much drosopterin (red pigment) as the eyes of wild-type males (FBrf0021089); the concentrations of xanthopterin and sepiapterin (brown pigments) are increased to about 110% of wild-type (FBrf0012680). Control of drosopterin synthesis seems to be related to the activity of the enzyme GTP cyclohydrolase (FBrf0031059). The pn1 eye color is autonomous in larval optic discs transplanted into wild-type hosts (FBrf0003530). Larval Malpighian tube color is normal (FBrf0005752). Standard pn mutants are homo- and hemizygous viable in a wild-type background, but show a lethal interaction with the third chromosome dominant awdK (FBrf0020565; FBrf0024856). Some temperature-sensitive pn mutants ('pnts-e' series), however, are insensitive to the killing action of awdK; one temperature-sensitive mutant (pnts-ek) is insensitive to awdK at permissive temperatures (18oC, 22oC), but sensitive to awdK at restrictive temperatures (25oC, 29oC) (FBrf0024860; FBrf0027926). The TSP for the eye color phenotype occurs during the late pupal stage, while the TSP for the pn component of the pn-awdK interaction begins at the late pupal stage and lasts until eclosion (FBrf0027926). Homo- and hemizygous pn deficiencies and other chromosomal rearrangements have been induced by Ilyina (FBrf0034407).
Analysis of the pn locus suggests that it may encode a cloned 1.4kb cDNA, which encodes a protein with similarity to the catalytic domain of mammalian GTPase-activating proteins.