The gene tan is referred to in FlyBase by the symbol Dmel\t (CG12120, FBgn0086367). It is a protein_coding_gene from Drosophila melanogaster. There is experimental evidence that it has the molecular function: beta-alanyl-histamine hydrolase activity; hydrolase activity; beta-alanyl-dopamine hydrolase activity. There is experimental evidence that it is involved in the biological process: dopamine biosynthetic process; cuticle pigmentation; histamine biosynthetic process; flight behavior; histamine metabolic process; visual perception. 26 alleles are reported. The phenotypes of these alleles are annotated with: adult cuticle; mesothoracic tergum; synaptic vesicle. It has 2 annotated transcripts and 2 annotated polypeptides. Protein features are: Peptidase C45, acyl-coenzyme A:6-aminopenicillanic acid acyl-transferase. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of high expression to a trough of extremely low expression. Peak expression observed during late pupal stages. Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: adult head, adult eye, larval/adult Malpighian tubules. Expression at moderate levels in the following post-embryonic organs or tissues: adult midgut, larval/adult hindgut, larval fat body, larval trachea, adult carcass. Comments on Affy2 ProbeSet: ProbeSet 1638505_at completely aligns to an exonic region of the only FlyBase-annotated transcript isoform of t. Gene sequence location is X:9111688..9117290.
User Contributed Data
Phenotypic Description from the Red Book (Lindsley
& Zimm 1992)
Gene/Allele symbols may differ
from current usage
t: tan (J.C. Hall)
Body color varies from light tan to almost wildtype. Easiest to identify by light tan antennae; male easier
than female. Larval mouthparts in mutant alleles, t1, t2, and
t3 lighter than normal at basal prongs; classifiable with difficulty in larvae (Brehme, 1941, Proc. Nat. Acad. Sci. USA
27: 254-61). Neurological defect first observed in t1 by
McEwen (1918), who reported that the mutant flies behaved as
if they were nonphotactic in his test apparatus (tube with
light at one end); Benzer (1967) and Pak et al., (1969), using
a similar but more elaborate apparatus and EMS-induced tan
alleles, reached the same conclusion. In a Y-maze test for
phototaxis, however, tan mutants are sensitive to light
(Hadler, 1984, Biol. Bull. 126: 264-73). In the electroretinogram (ERG) tracing obtained when one electrode is inserted
in the first optic ganglion (lamina) below the ommatidia, the
on- and off-transients of tan flies are reduced or missing,
but the other ERG components are present, indicating that the
mutant is not blind although it appears behaviorly blind in
some tests. Mosaic studies (Hotta and Benzer, 1970, Proc.
Nat. Acad. Sci. USA 67: 1156-63) indicate that the ERG phenotype of tan is cell autonomous. The optomotor responses of
mutants to horizontal and vertical movements are abnormal in
that light intensity thresholds for responses are raised, the
extent depending on the allele (Heisenberg, 1971, DIS 46: 68;
Heisenberg and Gotz, 1975; Heisenberg and Buchner, 1977). No
walking optomotor responses are detected, but there can be
positive responses in flying optomotor tests if the rotating
vertical stripes are relatively wide.
The enzyme tyrosinase, which converts tyrosine to 3,4-dihydroxyphenylalanine (DOPA), is formed in tan adults
(Horowitz). Dopamine, an important component of catecholamine
metabolism (involved in both melanization of cuticle and synthesis of neurotransmitters), has been found in reduced
amounts (about 60% of the wild-type concentration) in t1 and
t5 (Konopka, 1972). The dopamine was detected only in late
pupae that show some pigmentation and in adult flies. One of
the enzymes involved in the formation of dopamine, β-alanyldopamine hydrolase (BAH), shows no activity in t/t and
t/Y mutants and reduced activity in t/+ heterozygotes as compared to wild-type (Black, Pentz, and Wright). This dosage
effect implicates tan as the structural gene for BAH (Wright,
1987).
The mutant tan is defective in courtship behaviors, the
males showing aberrant visually-mediated responses to moving
female flies (Cook, 1980, Biol. Cybernet. 37: 41-51; Tompkins, Gross, Hall, Gailey, and Siegel, 1982, Behav. Genet.
12: 295-307).
Recent Updates
Description
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FB2013_03
FB2013_02
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Detailed Mapping Data
FlyBase Computed Cytological Location
Cytogenetic map
Evidence for location
8D1-8D1
Limits computationally determined from genome sequence between P{EP}EP1450&P{EP}EP1356 and P{EP}EP912EP912; Left limit from inclusion within Df(1)t282-1 (FBrf0005862) Right limit from recombination mapping relative to l(1)291-7 (FBrf0004287)
Experimentally Determined Cytological Location
Cytogenetic map
Notes
References
8D1-8D1
Location inferred from insertion in: td07784Location inferred from insertion in: tGG01557Limits computationally determined from genome sequence between P{EP}EP1450&P{EP}EP1356 and P{EP}EP912EP912;
t is found to be strongly immunolabelled in the terminals of photoreceptor cells R to R6 in the lamina, and of photoreceptor cells R7 and R8 in the medulla.
Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: adult head, adult eye, larval/adult Malpighian tubules. Expression at moderate levels in the following post-embryonic organs or tissues: adult midgut, larval/adult hindgut, larval fat body, larval trachea, 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
8.075
Larval Midgut
95.7
Larval Hindgut
150.9
Larval Malpighian Tubules
702.8
Larval Fat Body
157.7
Larval Salivary Gland
12.8
Larval Trachea
114.775
Larval Carcass
13.55
Adult Head
1206.8
Adult Eye
2063.5
Adult Brain
55.8
Adult Thoracic-Abdominal Ganglion
8.4
Adult Crop
17.9
Adult Midgut
129.7
Adult Hindgut
323.2
Adult Malpighian Tubules
1003.9
Adult Fat Body
31.7
Adult Salivary Gland
58.9
Adult Heart
13.175
Adult VirginFemale Spermatheca
20.9
Adult InseminatedFemale Spermatheca
33
Adult Ovary
3.2
Adult Testis
45.2
Adult Male Accessory Gland
42.8
Adult Carcass
164.8
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
8.075
Larval Midgut
95.7
Larval Hindgut
150.9
Larval Malpighian Tubules
(702.8)
Larval Fat Body
157.7
Larval Salivary Gland
12.8
Larval Trachea
114.775
Larval Carcass
13.55
Adult Head
(1206.8)
Adult Eye
(2063.5)
Adult Brain
55.8
Adult Thoracic-Abdominal Ganglion
8.4
Adult Crop
17.9
Adult Midgut
129.7
Adult Hindgut
323.2
Adult Malpighian Tubules
(1003.9)
Adult Fat Body
31.7
Adult Salivary Gland
58.9
Adult Heart
13.175
Adult VirginFemale Spermatheca
20.9
Adult InseminatedFemale Spermatheca
33
Adult Ovary
3.2
Adult Testis
45.2
Adult Male Accessory Gland
42.8
Adult Carcass
164.8
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
8.075
Larval Midgut
95.7
Larval Hindgut
150.9
Larval Malpighian Tubules
702.8
Larval Fat Body
157.7
Larval Salivary Gland
12.8
Larval Trachea
114.775
Larval Carcass
13.55
Adult Head
(1206.8)
Adult Eye
(2063.5)
Adult Brain
55.8
Adult Thoracic-Abdominal Ganglion
8.4
Adult Crop
17.9
Adult Midgut
129.7
Adult Hindgut
323.2
Adult Malpighian Tubules
1003.9
Adult Fat Body
31.7
Adult Salivary Gland
58.9
Adult Heart
13.175
Adult VirginFemale Spermatheca
20.9
Adult InseminatedFemale Spermatheca
33
Adult Ovary
3.2
Adult Testis
45.2
Adult Male Accessory Gland
42.8
Adult Carcass
164.8
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
8.075
Larval Midgut
95.7
Larval Hindgut
150.9
Larval Malpighian Tubules
702.8
Larval Fat Body
157.7
Larval Salivary Gland
12.8
Larval Trachea
114.775
Larval Carcass
13.55
Adult Head
1206.8
Adult Eye
2063.5
Adult Brain
55.8
Adult Thoracic-Abdominal Ganglion
8.4
Adult Crop
17.9
Adult Midgut
129.7
Adult Hindgut
323.2
Adult Malpighian Tubules
1003.9
Adult Fat Body
31.7
Adult Salivary Gland
58.9
Adult Heart
13.175
Adult VirginFemale Spermatheca
20.9
Adult InseminatedFemale Spermatheca
33
Adult Ovary
3.2
Adult Testis
45.2
Adult Male Accessory Gland
42.8
Adult Carcass
164.8
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
8.075
Larval Midgut
95.7
Larval Hindgut
150.9
Larval Malpighian Tubules
702.8
Larval Fat Body
157.7
Larval Salivary Gland
12.8
Larval Trachea
114.775
Larval Carcass
13.55
Adult Head
1206.8
Adult Eye
2063.5
Adult Brain
55.8
Adult Thoracic-Abdominal Ganglion
8.4
Adult Crop
17.9
Adult Midgut
129.7
Adult Hindgut
323.2
Adult Malpighian Tubules
1003.9
Adult Fat Body
31.7
Adult Salivary Gland
58.9
Adult Heart
13.175
Adult VirginFemale Spermatheca
20.9
Adult InseminatedFemale Spermatheca
33
Adult Ovary
3.2
Adult Testis
45.2
Adult Male Accessory Gland
42.8
Adult Carcass
164.8
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
8.075
Larval Midgut
95.7
Larval Hindgut
150.9
Larval Malpighian Tubules
702.8
Larval Fat Body
157.7
Larval Salivary Gland
12.8
Larval Trachea
114.775
Larval Carcass
13.55
Adult Head
(1206.8)
Adult Eye
(2063.5)
Adult Brain
55.8
Adult Thoracic-Abdominal Ganglion
8.4
Adult Crop
17.9
Adult Midgut
129.7
Adult Hindgut
323.2
Adult Malpighian Tubules
(1003.9)
Adult Fat Body
31.7
Adult Salivary Gland
58.9
Adult Heart
13.175
Adult VirginFemale Spermatheca
20.9
Adult InseminatedFemale Spermatheca
33
Adult Ovary
3.2
Adult Testis
45.2
Adult Male Accessory Gland
42.8
Adult Carcass
164.8
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
8.075
Larval Midgut
95.7
Larval Hindgut
150.9
Larval Malpighian Tubules
702.8
Larval Fat Body
157.7
Larval Salivary Gland
12.8
Larval Trachea
114.775
Larval Carcass
13.55
Adult Head
1206.8
Adult Eye
(2063.5)
Adult Brain
55.8
Adult Thoracic-Abdominal Ganglion
8.4
Adult Crop
17.9
Adult Midgut
129.7
Adult Hindgut
323.2
Adult Malpighian Tubules
1003.9
Adult Fat Body
31.7
Adult Salivary Gland
58.9
Adult Heart
13.175
Adult VirginFemale Spermatheca
20.9
Adult InseminatedFemale Spermatheca
33
Adult Ovary
3.2
Adult Testis
45.2
Adult Male Accessory Gland
42.8
Adult Carcass
164.8
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
8.075
Larval Midgut
95.7
Larval Hindgut
150.9
Larval Malpighian Tubules
702.8
Larval Fat Body
157.7
Larval Salivary Gland
12.8
Larval Trachea
114.775
Larval Carcass
13.55
Adult Head
1206.8
Adult Eye
2063.5
Adult Brain
55.8
Adult Thoracic-Abdominal Ganglion
8.4
Adult Crop
17.9
Adult Midgut
129.7
Adult Hindgut
323.2
Adult Malpighian Tubules
1003.9
Adult Fat Body
31.7
Adult Salivary Gland
58.9
Adult Heart
13.175
Adult VirginFemale Spermatheca
20.9
Adult InseminatedFemale Spermatheca
33
Adult Ovary
3.2
Adult Testis
45.2
Adult Male Accessory Gland
42.8
Adult Carcass
164.8
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 extremely low expression. Peak expression observed during late pupal 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.
The dopamine was detected only in late pupae that show some pigmentation and in adult flies. One of the enzymes involved in the formation of dopamine, β-alanyldopamine hydrolase (BAH), shows no activity in t/t and t/Y mutants and reduced activity in t/+ heterozygotes as compared to wild-type.
The optomotor responses of mutants to horizontal and vertical movements are abnormal in that light intensity thresholds for responses are raised, the extent depending on the allele.
No walking optomotor responses are detected, but there can be positive responses in flying optomotor tests if the rotating vertical stripes are relatively wide. The enzyme tyrosinase, which converts tyrosine to 3,4-dihydroxyphenylalanine (DOPA), is formed in tan adults.
Body color varies from light tan to almost wild-type. Easiest to identify by light tan antennae; male easier than female. Larval mouthparts in mutant alleles.