The gene purple is referred to in FlyBase by the symbol Dmel\pr (CG16784, FBgn0003141). It is a protein_coding_gene from Drosophila melanogaster. Based on sequence similarity, it is predicted to have molecular function: 6-pyruvoyltetrahydropterin synthase activity. There is experimental evidence that it is involved in the biological process: pteridine biosynthetic process. 20 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: 6-pyruvoyl tetrahydropterin synthase, cysteine active site; 6-pyruvoyl tetrahydropterin synthase, histidine active site; 6-pyruvoyl tetrahydropterin synthase/QueD family protein. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of high expression to a trough of moderate expression. Peak expression observed within 00-06 hour embryonic stages, during late larval stages. Summary of FlyAtlas Anatomical Expression Data: Nearly all larval and adult organs/tissues expressed at moderate or high levels. Expression at high levels in the following post-embryonic organs or tissues: adult head, adult eye, larval fat body, adult spermathecae, adult male accessory gland. Expression at moderate levels in the following post-embryonic organs or tissues: larval/adult central nervous system, adult crop, larval/adult midgut, larval/adult hindgut, larval/adult Malpighian tubules, adult heart, adult fat body, larval/adult salivary gland, larval trachea, adult ovary, larval/adult carcass. Comments on Affy2 ProbeSet: ProbeSet 1637036_s_at completely aligns to an exonic region common to each of the 2 FlyBase-annotated transcript isoforms of pr. Gene sequence location is 2L:20073719..20075467.
User Contributed Data
Phenotypic Description from the Red Book (Lindsley
& Zimm 1992)
Gene/Allele symbols may differ
from current usage
pr: purple
Eye color ruby at hatching, darkening to purplish
ruby with age [Sturtevant and Beadle, 1939, An Introduction to
Genetics, W.B. Saunders Co., Philadelphia and London, p. 64
(plate I)]; orange in combination with st, reddish brown in
combination with bw (Mainz, 1938). pr eye color autonomous in
larval optic disks transplanted into wild-type hosts (Beadle
and Ephrussi, 1936, Genetics 21: 230). Larval Malpighian
tubules wild-type in color (Beadle, 1937, Genetics 22: 587-611). Mutants deficient in pteridines (Hadorn and Mitchell,
1951, Proc. Nat. Acad. Sci. USA 37: 650-65; Wilson and Jacobson, 1977; Yim et al., 1977); sepiapterin and the drosopterins
are markedly reduced relative to wild type in pr1 and prbw
(Wilson and Jacobson, 1977; Dorsett and Brown, 1982), the
effect being greater in prbw than in pr1. The enzyme
sepiapterin synthase A, which is involved in early steps leading to the synthesis of the drosopterins (Wiederrect et al.,
1984a, 1984b), is most active in wild-type Drosophila in late
pupae and young adults when sepiapterin accumulation begins
and the eyes become pigmented (Krivi and Brown, 1979, Biochem.
Genet. 17: 371-90). When pr+ has been translocated into the Y
chromosome [Tp(2;Y)prC5], the Tp(2;Y)prC5, cn/prC4cn flies
show a variegated eye color (Yim et al., 1977; Tobler et al.,
1979) and the mutant late larvae and early pupae show a reduction in sepiapterin synthase A activity as compared to both
wild-type and pr1 (Tobler et al., 1979). The suppressors
su(s)2 and su(pr)e3 restore the pyrimidine level of pr1 and
prbw to that of wild-type or nearly wild-type (Wilson and
Jacobson, 1977; Yim et al., 1977).
Recent Updates
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Summary of FlyAtlas Anatomical Expression Data: Nearly all larval and adult organs/tissues expressed at moderate or high levels. Expression at high levels in the following post-embryonic organs or tissues: adult head, adult eye, larval fat body, adult spermathecae, adult male accessory gland. Expression at moderate levels in the following post-embryonic organs or tissues: larval/adult central nervous system, adult crop, larval/adult midgut, larval/adult hindgut, larval/adult Malpighian tubules, adult heart, adult fat body, larval/adult salivary gland, larval trachea, adult ovary, larval/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
278.4
Larval Midgut
125.6
Larval Hindgut
105.6
Larval Malpighian Tubules
169.9
Larval Fat Body
1181.4
Larval Salivary Gland
407.7
Larval Trachea
316.325
Larval Carcass
213.325
Adult Head
521.3
Adult Eye
1077.2
Adult Brain
173
Adult Thoracic-Abdominal Ganglion
183.5
Adult Crop
245.6
Adult Midgut
173
Adult Hindgut
107.4
Adult Malpighian Tubules
157
Adult Fat Body
408.5
Adult Salivary Gland
417
Adult Heart
264.375
Adult VirginFemale Spermatheca
500.1
Adult InseminatedFemale Spermatheca
510.8
Adult Ovary
365.5
Adult Testis
63.7
Adult Male Accessory Gland
567.2
Adult Carcass
288.3
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
278.4
Larval Midgut
125.6
Larval Hindgut
105.6
Larval Malpighian Tubules
169.9
Larval Fat Body
(1181.4)
Larval Salivary Gland
407.7
Larval Trachea
316.325
Larval Carcass
213.325
Adult Head
521.3
Adult Eye
(1077.2)
Adult Brain
173
Adult Thoracic-Abdominal Ganglion
183.5
Adult Crop
245.6
Adult Midgut
173
Adult Hindgut
107.4
Adult Malpighian Tubules
157
Adult Fat Body
408.5
Adult Salivary Gland
417
Adult Heart
264.375
Adult VirginFemale Spermatheca
500.1
Adult InseminatedFemale Spermatheca
510.8
Adult Ovary
365.5
Adult Testis
63.7
Adult Male Accessory Gland
(567.2)
Adult Carcass
288.3
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
278.4
Larval Midgut
125.6
Larval Hindgut
105.6
Larval Malpighian Tubules
169.9
Larval Fat Body
(1181.4)
Larval Salivary Gland
407.7
Larval Trachea
316.325
Larval Carcass
213.325
Adult Head
521.3
Adult Eye
1077.2
Adult Brain
173
Adult Thoracic-Abdominal Ganglion
183.5
Adult Crop
245.6
Adult Midgut
173
Adult Hindgut
107.4
Adult Malpighian Tubules
157
Adult Fat Body
408.5
Adult Salivary Gland
417
Adult Heart
264.375
Adult VirginFemale Spermatheca
500.1
Adult InseminatedFemale Spermatheca
510.8
Adult Ovary
365.5
Adult Testis
63.7
Adult Male Accessory Gland
567.2
Adult Carcass
288.3
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
278.4
Larval Midgut
125.6
Larval Hindgut
105.6
Larval Malpighian Tubules
169.9
Larval Fat Body
1181.4
Larval Salivary Gland
407.7
Larval Trachea
316.325
Larval Carcass
213.325
Adult Head
521.3
Adult Eye
1077.2
Adult Brain
173
Adult Thoracic-Abdominal Ganglion
183.5
Adult Crop
245.6
Adult Midgut
173
Adult Hindgut
107.4
Adult Malpighian Tubules
157
Adult Fat Body
408.5
Adult Salivary Gland
417
Adult Heart
264.375
Adult VirginFemale Spermatheca
500.1
Adult InseminatedFemale Spermatheca
510.8
Adult Ovary
365.5
Adult Testis
63.7
Adult Male Accessory Gland
567.2
Adult Carcass
288.3
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
278.4
Larval Midgut
125.6
Larval Hindgut
105.6
Larval Malpighian Tubules
169.9
Larval Fat Body
1181.4
Larval Salivary Gland
407.7
Larval Trachea
316.325
Larval Carcass
213.325
Adult Head
521.3
Adult Eye
1077.2
Adult Brain
173
Adult Thoracic-Abdominal Ganglion
183.5
Adult Crop
245.6
Adult Midgut
173
Adult Hindgut
107.4
Adult Malpighian Tubules
157
Adult Fat Body
408.5
Adult Salivary Gland
417
Adult Heart
264.375
Adult VirginFemale Spermatheca
500.1
Adult InseminatedFemale Spermatheca
510.8
Adult Ovary
365.5
Adult Testis
63.7
Adult Male Accessory Gland
567.2
Adult Carcass
288.3
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
278.4
Larval Midgut
125.6
Larval Hindgut
105.6
Larval Malpighian Tubules
169.9
Larval Fat Body
(1181.4)
Larval Salivary Gland
407.7
Larval Trachea
316.325
Larval Carcass
213.325
Adult Head
521.3
Adult Eye
(1077.2)
Adult Brain
173
Adult Thoracic-Abdominal Ganglion
183.5
Adult Crop
245.6
Adult Midgut
173
Adult Hindgut
107.4
Adult Malpighian Tubules
157
Adult Fat Body
408.5
Adult Salivary Gland
417
Adult Heart
264.375
Adult VirginFemale Spermatheca
500.1
Adult InseminatedFemale Spermatheca
510.8
Adult Ovary
365.5
Adult Testis
63.7
Adult Male Accessory Gland
567.2
Adult Carcass
288.3
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
278.4
Larval Midgut
125.6
Larval Hindgut
105.6
Larval Malpighian Tubules
169.9
Larval Fat Body
1181.4
Larval Salivary Gland
407.7
Larval Trachea
316.325
Larval Carcass
213.325
Adult Head
521.3
Adult Eye
1077.2
Adult Brain
173
Adult Thoracic-Abdominal Ganglion
183.5
Adult Crop
245.6
Adult Midgut
173
Adult Hindgut
107.4
Adult Malpighian Tubules
157
Adult Fat Body
408.5
Adult Salivary Gland
417
Adult Heart
264.375
Adult VirginFemale Spermatheca
500.1
Adult InseminatedFemale Spermatheca
510.8
Adult Ovary
365.5
Adult Testis
63.7
Adult Male Accessory Gland
567.2
Adult Carcass
288.3
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
278.4
Larval Midgut
125.6
Larval Hindgut
105.6
Larval Malpighian Tubules
169.9
Larval Fat Body
1181.4
Larval Salivary Gland
407.7
Larval Trachea
316.325
Larval Carcass
213.325
Adult Head
521.3
Adult Eye
1077.2
Adult Brain
173
Adult Thoracic-Abdominal Ganglion
183.5
Adult Crop
245.6
Adult Midgut
173
Adult Hindgut
107.4
Adult Malpighian Tubules
157
Adult Fat Body
408.5
Adult Salivary Gland
417
Adult Heart
264.375
Adult VirginFemale Spermatheca
500.1
Adult InseminatedFemale Spermatheca
510.8
Adult Ovary
365.5
Adult Testis
63.7
Adult Male Accessory Gland
567.2
Adult Carcass
288.3
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 high expression to a trough of moderate expression. Peak expression observed within 00-06 hour embryonic stages, during late larval stages.
[download data (TSV)]
Please Note FlyBase no
longer curates genomic clone accessions so this list
may not be complete
cDNA Clones ( 23 )
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.
vpr mutants are able to synthesize xanthurenic acid 8-glucoside when fed with xanthuretic acid and the activity required for its synthesis via xanthuretic acid are found.
Mutants deficient in pteridines. Sepiapterin and the drosopterins are markedly reduced relative to wild type in pr1 and prbw, the effect being greater in prbw than in pr1. The suppressors su(s)2 and su(pr)3 restore the pyrimidine level of pr1 and prbw to that of wild-type or nearly wild-type.
Mutants deficient in pteridines. When pr+ has been translocated into the Y chromosome <up>T(Y;2)prC5</up>, the T(Y;2)prC5, cn1/prC4, cn1 flies show a variegated eye color. The suppressors su(s)2 and su(pr)3 restore the pyrimidine level of pr1 and prbw to that of wild-type or nearly wild-type.