The gene small optic lobes is referred to in FlyBase by the symbol Dmel\sol (CG1391, FBgn0003464). It is a protein_coding_gene from Drosophila melanogaster. Based on sequence similarity, it is predicted to have molecular function: calcium-dependent cysteine-type endopeptidase activity. There is experimental evidence that it is involved in the biological process: nervous system development. 24 alleles are reported. The phenotypes of these alleles are annotated with: medulla neuropil; lobula plate; embryonic/larval optic stalk; central nervous system; lobula plate cortex; optic lobe; lobula; adult central nervous system; cortex of medulla; Pdf neuron. It has 5 annotated transcripts and 5 annotated polypeptides. Protein features are: Cysteine peptidase, cysteine active site; Peptidase C2, calpain family; Peptidase C2, calpain, catalytic domain; Zinc finger, RanBP2-type. Summary of modENCODE Temporal Expression Profile: Temporal profile ranges from a peak of moderately high expression to a trough of moderate expression. Peak expression observed within 00-18 hour embryonic stages, during early pupal stages, in adult female stages. Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: adult brain. Expression at moderate levels in the following post-embryonic organs or tissues: adult head, adult eye, larval/adult central nervous system, adult crop, larval/adult midgut, larval/adult hindgut, larval/adult Malpighian tubules, larval fat body, adult salivary gland, larval trachea, adult ovary, adult male accessory gland, larval carcass. Comments on Affy2 ProbeSet: ProbeSet 1634504_a_at completely aligns to an exonic region common to each of the 5 FlyBase-annotated transcript isoforms of sol. Gene sequence location is X:21221307..21228939.
User Contributed Data
Phenotypic Description from the Red Book (Lindsley
& Zimm 1992)
Gene/Allele symbols may differ
from current usage
sol: small optic lobes (J.C. Hall)
Medulla, lobula, and lobula-plate optic ganglia
reduced in volume and cell number (anatomical criteria on
which several of the mutations, including the most studied
allele sol1, were isolated by Heisenberg and Bohl, 1979, Z.
Naturforsch. 34: 143-147); lamina seems unaffected; degree of
reduction in the three more proximal visual-system ganglia is
allele dependent; after isogenization the severity ranking of
nine alleles was as follows: sol2 = sol3 (ca. 50% normal
volume)>sol6 = sol9 = sol16 >sol1 = sol4 = sol5 = sol8 (ca.
30% normal volume). Three sol mutants isolated on basis of
fast phototaxis; Markow and Merriam (1977) showed that one
such allele, sol4, causes flies to be anomalously photo positive and highly geonegative in maze tests. Anatomically, sol
mutations cause specific cell types in medulla to be missing
(Fischbach and Heisenberg, 1981); stratifications in outer
medulla are missing; in general, however, mutant optic lobes
are grossly well structured, and there are no disorders in the
optic chiasma; special classes of transmedullary columnar neurons as well as intramedullary cells are absent; numbers of
columns in the visual ganglia are normal, but numbers of neurons per column are reduced; certain neurons called T1 cells
are present in each column in sol1, as usual; these reductions
in cell numbers are caused by cell-type-specific degeneration
of presumptive optic lobe neurons during pupation, with no
degeneration apparent in neuropiles of these ganglia (Fischbach and Technau, 1984); the number of axons severely reduced
in anterior optic track, and the combining of so with sol1
showed that these two mutations act independently on nearly
exclusive subsets of these axons (Fischbach and Lyly-Hunerberg, 1983). Mosaic study showed that aberrant morphology of visual ganglia is autonomous in these optic lobes
(Fischbach and Technau, 1984); adult eye and lamina optic lobe
appear normal. In combination with rol and mnb mutations, sol
causes diminished amplitudes of light-on and light-off transient spikes in electroretinogram (Coombe, 1986); visual fixation behavior notably defective (Fischbach and Heisenberg,
1981) [e.g., in the walking mode, fixation behavior is actually reversed in all sol alleles (Fischbach)] as, to a lesser
degree, are landing responses and "figure/ground" discrimination; on the other hand, optomotor yaw response is nearly normal (Fischbach and Heisenberg, 1981); orientation to spots in
multiple Y-maze quite subnormal (Bulthoff, 1982a,b). Shock-avoidance learning of sol1 (Heisenberg, Borst, Wagner, and
Byers, 1985, J. Neurogenet. 2: 1-30) and color discrimination
in sol1, sol2, and sol3 (Fischbach) are normal; there are,
however, deficits in visual plasticity (Gotz, 1983, Dtsch.
Zool. Ges. Gustav Fischer Verlag, Stuttgart, pp. 83-99) and in
the flexibility that wild types can exhibit in optomotor
flight control tests (Gotz, 1985, Biol. Chem. Hoppe Seyler
366: 116-17). Circadian rhythms of adult locomotor activity
basically normal (Helfrich and Engelmann, 1983; Helfrich,
1986), but when sol1 combined with so, all flies tested showed
complex periodicities, with a given behavioral record having
one component at approximately 21 and another at approximately
26 h (Helfrich, 1986).
Recent Updates
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Summary of FlyAtlas Anatomical Expression Data: Expression at high levels in the following post-embryonic organs or tissues: adult brain. Expression at moderate levels in the following post-embryonic organs or tissues: adult head, adult eye, larval/adult central nervous system, adult crop, larval/adult midgut, larval/adult hindgut, larval/adult Malpighian tubules, larval fat body, adult salivary gland, larval trachea, adult ovary, adult male accessory gland, larval 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
344.275
Larval Midgut
125.2
Larval Hindgut
125.1
Larval Malpighian Tubules
109.7
Larval Fat Body
147.7
Larval Salivary Gland
81.2
Larval Trachea
164.2
Larval Carcass
113.25
Adult Head
190.2
Adult Eye
303.85
Adult Brain
528.4
Adult Thoracic-Abdominal Ganglion
498.6
Adult Crop
173.9
Adult Midgut
179.2
Adult Hindgut
150
Adult Malpighian Tubules
209.9
Adult Fat Body
26
Adult Salivary Gland
103.5
Adult Heart
69.3
Adult VirginFemale Spermatheca
70.1
Adult InseminatedFemale Spermatheca
85.2
Adult Ovary
364.8
Adult Testis
50.9
Adult Male Accessory Gland
120.5
Adult Carcass
92.5
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
344.275
Larval Midgut
125.2
Larval Hindgut
125.1
Larval Malpighian Tubules
109.7
Larval Fat Body
147.7
Larval Salivary Gland
81.2
Larval Trachea
164.2
Larval Carcass
113.25
Adult Head
190.2
Adult Eye
303.85
Adult Brain
528.4
Adult Thoracic-Abdominal Ganglion
498.6
Adult Crop
173.9
Adult Midgut
179.2
Adult Hindgut
150
Adult Malpighian Tubules
209.9
Adult Fat Body
26
Adult Salivary Gland
103.5
Adult Heart
69.3
Adult VirginFemale Spermatheca
70.1
Adult InseminatedFemale Spermatheca
85.2
Adult Ovary
364.8
Adult Testis
50.9
Adult Male Accessory Gland
120.5
Adult Carcass
92.5
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
344.275
Larval Midgut
125.2
Larval Hindgut
125.1
Larval Malpighian Tubules
109.7
Larval Fat Body
147.7
Larval Salivary Gland
81.2
Larval Trachea
164.2
Larval Carcass
113.25
Adult Head
190.2
Adult Eye
303.85
Adult Brain
528.4
Adult Thoracic-Abdominal Ganglion
498.6
Adult Crop
173.9
Adult Midgut
179.2
Adult Hindgut
150
Adult Malpighian Tubules
209.9
Adult Fat Body
26
Adult Salivary Gland
103.5
Adult Heart
69.3
Adult VirginFemale Spermatheca
70.1
Adult InseminatedFemale Spermatheca
85.2
Adult Ovary
364.8
Adult Testis
50.9
Adult Male Accessory Gland
120.5
Adult Carcass
92.5
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
344.275
Larval Midgut
125.2
Larval Hindgut
125.1
Larval Malpighian Tubules
109.7
Larval Fat Body
147.7
Larval Salivary Gland
81.2
Larval Trachea
164.2
Larval Carcass
113.25
Adult Head
190.2
Adult Eye
303.85
Adult Brain
528.4
Adult Thoracic-Abdominal Ganglion
498.6
Adult Crop
173.9
Adult Midgut
179.2
Adult Hindgut
150
Adult Malpighian Tubules
209.9
Adult Fat Body
26
Adult Salivary Gland
103.5
Adult Heart
69.3
Adult VirginFemale Spermatheca
70.1
Adult InseminatedFemale Spermatheca
85.2
Adult Ovary
364.8
Adult Testis
50.9
Adult Male Accessory Gland
120.5
Adult Carcass
92.5
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
344.275
Larval Midgut
125.2
Larval Hindgut
125.1
Larval Malpighian Tubules
109.7
Larval Fat Body
147.7
Larval Salivary Gland
81.2
Larval Trachea
164.2
Larval Carcass
113.25
Adult Head
190.2
Adult Eye
303.85
Adult Brain
528.4
Adult Thoracic-Abdominal Ganglion
498.6
Adult Crop
173.9
Adult Midgut
179.2
Adult Hindgut
150
Adult Malpighian Tubules
209.9
Adult Fat Body
26
Adult Salivary Gland
103.5
Adult Heart
69.3
Adult VirginFemale Spermatheca
70.1
Adult InseminatedFemale Spermatheca
85.2
Adult Ovary
364.8
Adult Testis
50.9
Adult Male Accessory Gland
120.5
Adult Carcass
92.5
Expression Level Scale
None
Low
Moderate
High
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
344.275
Larval Midgut
125.2
Larval Hindgut
125.1
Larval Malpighian Tubules
109.7
Larval Fat Body
147.7
Larval Salivary Gland
81.2
Larval Trachea
164.2
Larval Carcass
113.25
Adult Head
190.2
Adult Eye
303.85
Adult Brain
528.4
Adult Thoracic-Abdominal Ganglion
498.6
Adult Crop
173.9
Adult Midgut
179.2
Adult Hindgut
150
Adult Malpighian Tubules
209.9
Adult Fat Body
26
Adult Salivary Gland
103.5
Adult Heart
69.3
Adult VirginFemale Spermatheca
70.1
Adult InseminatedFemale Spermatheca
85.2
Adult Ovary
364.8
Adult Testis
50.9
Adult Male Accessory Gland
120.5
Adult Carcass
92.5
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
344.275
Larval Midgut
125.2
Larval Hindgut
125.1
Larval Malpighian Tubules
109.7
Larval Fat Body
147.7
Larval Salivary Gland
81.2
Larval Trachea
164.2
Larval Carcass
113.25
Adult Head
190.2
Adult Eye
303.85
Adult Brain
528.4
Adult Thoracic-Abdominal Ganglion
498.6
Adult Crop
173.9
Adult Midgut
179.2
Adult Hindgut
150
Adult Malpighian Tubules
209.9
Adult Fat Body
26
Adult Salivary Gland
103.5
Adult Heart
69.3
Adult VirginFemale Spermatheca
70.1
Adult InseminatedFemale Spermatheca
85.2
Adult Ovary
364.8
Adult Testis
50.9
Adult Male Accessory Gland
120.5
Adult Carcass
92.5
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
344.275
Larval Midgut
125.2
Larval Hindgut
125.1
Larval Malpighian Tubules
109.7
Larval Fat Body
147.7
Larval Salivary Gland
81.2
Larval Trachea
164.2
Larval Carcass
113.25
Adult Head
190.2
Adult Eye
303.85
Adult Brain
528.4
Adult Thoracic-Abdominal Ganglion
498.6
Adult Crop
173.9
Adult Midgut
179.2
Adult Hindgut
150
Adult Malpighian Tubules
209.9
Adult Fat Body
26
Adult Salivary Gland
103.5
Adult Heart
69.3
Adult VirginFemale Spermatheca
70.1
Adult InseminatedFemale Spermatheca
85.2
Adult Ovary
364.8
Adult Testis
50.9
Adult Male Accessory Gland
120.5
Adult Carcass
92.5
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 moderate expression. Peak expression observed within 00-18 hour embryonic stages, during early pupal stages, in adult female stages.
[download data (TSV)]
Please Note FlyBase no
longer curates genomic clone accessions so this list
may not be complete
cDNA Clones ( 70 )
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.
In behavioral tests, sol1 was complemented by alleles of l(1)19Ff and also by mutations at the nearby slgA, uncl and stn loci (Miklos et al., 1987).
Medulla, lobula and lobula-plate optic ganglia reduced in volume and cell number (anatomical criteria on which several of the mutations, including the most studied allele sol1, were isolated by Heisenberg and Bohl, 1979); lamina seems unaffected; degree of reduction in the three more proximal visual-system ganglia is allele-dependent; after isogenization the severity ranking of nine alleles was as follows: sol2 = sol3 (ca. 50% normal volume) > sol6 = sol9 = sol16 > sol1 = sol4 = sol5 = sol8 (ca. 30% normal volume). Three sol mutants isolated on basis of fast phototaxis; Markow and Merriam (1977) showed that one such allele, sol4, causes flies to be anomalously photo positive and highly geonegative in maze tests. Anatomically, sol mutations cause specific cell types in medulla to be missing (Fischbach and Heisenberg, 1981); stratifications in outer medulla are missing; in general, however, mutant optic lobes are grossly well structured, and there are no disorders in the optic chiasma; special classes of transmedullary columnar neurons as well as intramedullary cells are absent; numbers of columns in the visual ganglia are normal, but numbers of neurons per column are reduced; certain neurons called T1 cells are present in each column in sol1, as usual; these reductions in cell numbers are caused by cell-type-specific degeneration of presumptive optic lobe neurons during pupation, with no degeneration apparent in neuropils of these ganglia (Fischbach and Technau, 1984); the number of axons severely reduced in anterior optic track and the combining of so with sol1 showed that these two mutations act independently on nearly exclusive subsets of these axons (Fischbach and Lyly-Hunerberg, 1983). Mosaic study showed that aberrant morphology of visual ganglia is autonomous in these optic lobes (Fischbach and Technau, 1984); adult eye and lamina optic lobe appear normal. In combination with rol and mnb mutations, sol causes diminished amplitudes of light-on and light-off transient spikes in electroretinogram (Coombe, 1986); visual fixation behavior notably defective (Fischbach and Heisenberg, 1981) <up>e.g., in the walking mode, fixation behavior is actually reversed in all sol alleles (Fischbach)</up> as, to a lesser degree, are landing responses and 'figure/ground' discrimination; on the other hand, optomotor yaw response is nearly normal (Fischbach and Heisenberg, 1981); orientation to spots in multiple Y-maze quite subnormal (Bulthoff, 1982a,b). Shock-avoidance learning of sol1 (Heisenberg, Borst, Wagner and Byers, 1985) and color discrimination in sol1, sol2, and sol3 (Fischbach) are normal; there are, however, deficits in visual plasticity (Gotz, 1983) and in the flexibility that wild types can exhibit in optomotor flight control tests (Gotz, 1985). Circadian rhythms of adult locomotor activity basically normal (Helfrich and Engelmann, 1983; Helfrich, 1986), but when sol1 combined with so, all flies tested showed complex periodicities, with a given behavioral record having one component at approximately 21 and another at approximately 26 h (Helfrich, 1986).