The gene inscuteable is referred to in FlyBase by the symbol Dmel\insc (CG11312, FBgn0011674). It is a protein_coding_gene from Drosophila melanogaster. There is experimental evidence that it has the molecular function: cytoskeletal adaptor activity; protein binding. There is experimental evidence for 11 unique biological process terms, many of which group under: localization; system development; biological regulation; single-organism developmental process; cell fate commitment; multicellular organismal development; cellular component organization or biogenesis; neuroblast fate commitment; apical protein localization; renal tubule development; somatic muscle development; regulation of developmental process; RNA localization; regulation of asymmetric cell division; cell cycle; stem cell division. 77 alleles are reported. The phenotypes of these alleles are annotated with: hypodermal muscle of larval abdomen; ISN innervated muscle of A1-7; organ system; A1-7 transverse muscle; organ system subdivision; hypodermal muscle of metathorax; thoracic segment; abdominal adult muscle precursor cell; hypodermal muscle of larval abdominal 2; embryonic/larval neuron. It has one annotated transcript and one annotated polypeptide. Protein features are: Armadillo-like helical; Armadillo-type fold. 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 06-18 hour embryonic stages. Summary of FlyAtlas Anatomical Expression Data: Expression at moderate levels in the following post-embryonic organs or tissues: larval central nervous system, adult crop, adult midgut, adult heart, adult ovary. Comments on Affy2 ProbeSet: ProbeSet 1625035_at completely aligns to an exonic region of the only FlyBase-annotated transcript isoform of insc. Gene sequence location is 2R:16708771..16723569.
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insc transcript is detected in 4-20 hr embryos, and in adult male and female flies. insc transcript is first detected during the cellular blastoderm stage within the procephalic neurogenic region. The region of expression extends dorsally at stage 6/7. Expression is subsequently detected in individual cells within the embryonic brain until late embryogenesis. During germ band extension, insc transcript expression is detected in the neurectoderm, and in early germ band extended embryos, the full wave of delaminating neuroblasts express insc transcript. In the developing CNS, most, if not all, neuroblasts express insc. Transient expression in some putative PNS precursors (external sense organ precursors and Ich5 precursor) is detected in 5 hr embryos. No CNS expression is detected after stage 14 of embryogenesis.
insc transcripts are detected in 3-12hr embryos on northern blots. Transcripts are first detected by in situ hybridization at stage 6 in the procephalic neurectoderm. Immediately thereafter, they are detected in neuroblasts of the first segregation wave after they have begun to delaminate. At later embryonic stages, the transcript expression pattern is stated to be the same as the distribution of insc protein which is as follows. In stage 10, expression is detected in two cells per segment in the lateral epidermis that are thought to be the first two cells that will give rise to the larval peripheral sense organs. Expression is lost in developing sense organs by the time of dorsal closure but remains in the CNS until after it has condensed. In stages 10-13, expression is seen in mesodermal cells presumed to be muscle precursors and in the posterior midgut primordia. Strong expression is seen at stage 15 in the pharynx, gastric caecae, hindgut, tracheal branches, and Malpighian tubules.
insc protein is first detected at stage 6 in the procephalic neurectoderm and later in the delaminating neuroblasts of the ventral nerve cord. At late stage 10, insc protein is detected in two cells per segment in the lateral epidermis that are thought to be the first two cells that will give rise to the larval peripheral sense organs. Expression is lost in developing sense organs by the time of dorsal closure but remains in the CNS until after it has condensed. In stages 10-13, expression is seen in mesodermal cells presumed to be muscle precursors and in the posterior midgut primordia. Strong expression is seen at stage 15 in the pharynx, gastric caecae, hindgut, tracheal branches, and Malpighian tubules. insc protein is also detected in pupal wing discs older than about 20hr after puparium formation. It is present in the intervein spaces and is excluded from the veins themselves.
The cell cycle dependence of insc protein localization was studied in neuroblasts. Protein is first detected during neuroblast delamination in a stalk that maintains contact with the epithelial surface. In delaminated neuroblasts, insc protein forms a crescent along the apical cell cortex. Shortly after delamination, neuroblasts enter mitosis. The apical crescent of insc protein persists through prophase and metaphase and becomes delocalized in anaphase. insc protein does not preferentially segregate into one of the daughter cells. insc protein localization is dependent on actin filaments but is not affected by destruction of microtubules.
Summary of FlyAtlas Anatomical Expression Data: Expression at moderate levels in the following post-embryonic organs or tissues: larval central nervous system, adult crop, adult midgut, adult heart, adult ovary.
[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
278.85
Larval Midgut
55.3
Larval Hindgut
63.1
Larval Malpighian Tubules
15
Larval Fat Body
57.6
Larval Salivary Gland
19.1
Larval Trachea
26.475
Larval Carcass
39.2
Adult Head
31.1
Adult Eye
13.1
Adult Brain
6
Adult Thoracic-Abdominal Ganglion
10.2
Adult Crop
127
Adult Midgut
127.9
Adult Hindgut
75.4
Adult Malpighian Tubules
12.3
Adult Fat Body
66
Adult Salivary Gland
23.5
Adult Heart
122.475
Adult VirginFemale Spermatheca
35.3
Adult InseminatedFemale Spermatheca
51.7
Adult Ovary
108.5
Adult Testis
12
Adult Male Accessory Gland
9.7
Adult Carcass
47.7
Expression Level Scale
None
Low
Moderate
Linear, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
278.85
Larval Midgut
55.3
Larval Hindgut
63.1
Larval Malpighian Tubules
15
Larval Fat Body
57.6
Larval Salivary Gland
19.1
Larval Trachea
26.475
Larval Carcass
39.2
Adult Head
31.1
Adult Eye
13.1
Adult Brain
6
Adult Thoracic-Abdominal Ganglion
10.2
Adult Crop
127
Adult Midgut
127.9
Adult Hindgut
75.4
Adult Malpighian Tubules
12.3
Adult Fat Body
66
Adult Salivary Gland
23.5
Adult Heart
122.475
Adult VirginFemale Spermatheca
35.3
Adult InseminatedFemale Spermatheca
51.7
Adult Ovary
108.5
Adult Testis
12
Adult Male Accessory Gland
9.7
Adult Carcass
47.7
Expression Level Scale
None
Low
Moderate
High
Linear, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
278.85
Larval Midgut
55.3
Larval Hindgut
63.1
Larval Malpighian Tubules
15
Larval Fat Body
57.6
Larval Salivary Gland
19.1
Larval Trachea
26.475
Larval Carcass
39.2
Adult Head
31.1
Adult Eye
13.1
Adult Brain
6
Adult Thoracic-Abdominal Ganglion
10.2
Adult Crop
127
Adult Midgut
127.9
Adult Hindgut
75.4
Adult Malpighian Tubules
12.3
Adult Fat Body
66
Adult Salivary Gland
23.5
Adult Heart
122.475
Adult VirginFemale Spermatheca
35.3
Adult InseminatedFemale Spermatheca
51.7
Adult Ovary
108.5
Adult Testis
12
Adult Male Accessory Gland
9.7
Adult Carcass
47.7
Expression Level Scale
None
Low
Moderate
High
Very high
Linear, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
278.85
Larval Midgut
55.3
Larval Hindgut
63.1
Larval Malpighian Tubules
15
Larval Fat Body
57.6
Larval Salivary Gland
19.1
Larval Trachea
26.475
Larval Carcass
39.2
Adult Head
31.1
Adult Eye
13.1
Adult Brain
6
Adult Thoracic-Abdominal Ganglion
10.2
Adult Crop
127
Adult Midgut
127.9
Adult Hindgut
75.4
Adult Malpighian Tubules
12.3
Adult Fat Body
66
Adult Salivary Gland
23.5
Adult Heart
122.475
Adult VirginFemale Spermatheca
35.3
Adult InseminatedFemale Spermatheca
51.7
Adult Ovary
108.5
Adult Testis
12
Adult Male Accessory Gland
9.7
Adult Carcass
47.7
Expression Level Scale
Very high
log, scaled to maximum expression level
Tissue
Expression Level
Larval Central Nervous System
278.85
Larval Midgut
55.3
Larval Hindgut
63.1
Larval Malpighian Tubules
15
Larval Fat Body
57.6
Larval Salivary Gland
19.1
Larval Trachea
26.475
Larval Carcass
39.2
Adult Head
31.1
Adult Eye
13.1
Adult Brain
6
Adult Thoracic-Abdominal Ganglion
10.2
Adult Crop
127
Adult Midgut
127.9
Adult Hindgut
75.4
Adult Malpighian Tubules
12.3
Adult Fat Body
66
Adult Salivary Gland
23.5
Adult Heart
122.475
Adult VirginFemale Spermatheca
35.3
Adult InseminatedFemale Spermatheca
51.7
Adult Ovary
108.5
Adult Testis
12
Adult Male Accessory Gland
9.7
Adult Carcass
47.7
Expression Level Scale
None
Low
Moderate
log, scaled to Moderate expression
Tissue
Expression Level
Larval Central Nervous System
278.85
Larval Midgut
55.3
Larval Hindgut
63.1
Larval Malpighian Tubules
15
Larval Fat Body
57.6
Larval Salivary Gland
19.1
Larval Trachea
26.475
Larval Carcass
39.2
Adult Head
31.1
Adult Eye
13.1
Adult Brain
6
Adult Thoracic-Abdominal Ganglion
10.2
Adult Crop
127
Adult Midgut
127.9
Adult Hindgut
75.4
Adult Malpighian Tubules
12.3
Adult Fat Body
66
Adult Salivary Gland
23.5
Adult Heart
122.475
Adult VirginFemale Spermatheca
35.3
Adult InseminatedFemale Spermatheca
51.7
Adult Ovary
108.5
Adult Testis
12
Adult Male Accessory Gland
9.7
Adult Carcass
47.7
Expression Level Scale
None
Low
Moderate
High
log, scaled to High level expression
Tissue
Expression Level
Larval Central Nervous System
278.85
Larval Midgut
55.3
Larval Hindgut
63.1
Larval Malpighian Tubules
15
Larval Fat Body
57.6
Larval Salivary Gland
19.1
Larval Trachea
26.475
Larval Carcass
39.2
Adult Head
31.1
Adult Eye
13.1
Adult Brain
6
Adult Thoracic-Abdominal Ganglion
10.2
Adult Crop
127
Adult Midgut
127.9
Adult Hindgut
75.4
Adult Malpighian Tubules
12.3
Adult Fat Body
66
Adult Salivary Gland
23.5
Adult Heart
122.475
Adult VirginFemale Spermatheca
35.3
Adult InseminatedFemale Spermatheca
51.7
Adult Ovary
108.5
Adult Testis
12
Adult Male Accessory Gland
9.7
Adult Carcass
47.7
Expression Level Scale
None
Low
Moderate
High
Very high
log, scaled to Very high expression
Tissue
Expression Level
Larval Central Nervous System
278.85
Larval Midgut
55.3
Larval Hindgut
63.1
Larval Malpighian Tubules
15
Larval Fat Body
57.6
Larval Salivary Gland
19.1
Larval Trachea
26.475
Larval Carcass
39.2
Adult Head
31.1
Adult Eye
13.1
Adult Brain
6
Adult Thoracic-Abdominal Ganglion
10.2
Adult Crop
127
Adult Midgut
127.9
Adult Hindgut
75.4
Adult Malpighian Tubules
12.3
Adult Fat Body
66
Adult Salivary Gland
23.5
Adult Heart
122.475
Adult VirginFemale Spermatheca
35.3
Adult InseminatedFemale Spermatheca
51.7
Adult Ovary
108.5
Adult Testis
12
Adult Male Accessory Gland
9.7
Adult Carcass
47.7
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 06-18 hour embryonic stages.
[download data (TSV)]
Please Note FlyBase no
longer curates genomic clone accessions so this list
may not be complete
cDNA Clones ( 29 )
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 complementation group previously identified as 'fam' corresponds to the sktl/insc locus. Until it is demonstrated to be otherwise, all alleles previously represented as alleles of 'fam' are now recorded as alleles of both insc and sktl.
Other Comments
insc has a role in augmenting metaphase spindle length in embryonic neuroblasts.
raps and insc might orient asymmetric cell divisions by localising or locally modulating a heterotrimeric G-protein signalling cascade at the apical cell cortex.
Asymmetrical segregation of numb protein into one of the sibling cells produced by division of muscle progenitor cells depends on insc, and is essential for the specification of distinct sibling cell fates.
insc and stau mediate asymmetric localization and segregation of pros RNA during neuroblast cell divisions. insc nucleates an apical complex and is required for protein localization, spindle orientation and RNA localization.
insc may be required for the development of the somatic musculature and the chordotonal organs of the PNS, but it is not involved in the development of the visceral mesoderm and the dorsal vessel.
The CNS and PNS of insc mutants are morphologically abnormal, resulting from general disorganization of the neuroblast array and defective neuroblast morphology and abnormal sense organ morphology. The numbers of particular neuroblasts, and their ganglion mother cell progeny, are also faulty.
Andersen et al., 2012, Dev. Biol. 363(1): 258--265
Sgt1 acts via an LKB1/AMPK pathway to establish cortical polarity in larval neuroblasts. [FBrf0217488]
Mauser and Prehoda, 2012, PLoS ONE 7(1): e29611
Inscuteable regulates the Pins-Mud spindle orientation pathway. [FBrf0218437]
Yoshiura et al., 2012, Dev. Cell 22(1): 79--91
Tre1 GPCR Signaling Orients Stem Cell Divisions in the Drosophila Central Nervous System. [FBrf0217269]
Culurgioni et al., 2011, Proc. Natl. Acad. Sci. U.S.A. 108(52): 20998--21003
Inscuteable and NuMA proteins bind competitively to Leu-Gly-Asn repeat-enriched protein (LGN) during asymmetric cell divisions. [FBrf0217064]
Smith and Prehoda, 2011, Mol. Cell 43(4): 540--549
Robust spindle alignment in Drosophila neuroblasts by ultrasensitive activation of pins. [FBrf0214708]
Tio et al., 2011, PLoS ONE 6(11): e26879
Asymmetric cell division and notch signaling specify dopaminergic neurons in Drosophila. [FBrf0216651]
van Eyk et al., 2011, Hum. Mol. Genet. 20(14): 2783--2794
Perturbation of the Akt/Gsk3-{beta} signalling pathway is common to Drosophila expressing expanded untranslated CAG, CUG and AUUCU repeat RNAs. [FBrf0213942]
Viktorin et al., 2011, Dev. Biol. 356(2): 553--565
Multipotent neural stem cells generate glial cells of the central complex through transit amplifying intermediate progenitors in Drosophila brain development. [FBrf0214495]
Wang et al., 2011, Dev. Cell 21(3): 520--533
An ana2/ctp/mud complex regulates spindle orientation in Drosophila neuroblasts. [FBrf0215580]
Zhu and Bhat, 2011, Dev. Biol. 357(2): 283--294
The Hem protein mediates neuronal migration by inhibiting WAVE degradation and functions opposite of Abelson tyrosine kinase. [FBrf0214765]
Zhu and Bhat, 2011, Mech. Dev. 128(7-10): 483--495
The Drosophila Hem/Kette/Nap1 protein regulates asymmetric division of neural precursor cells by regulating localization of Inscuteable and Numb. [FBrf0216763]