Dmel\P{lacW}shgk03401 Insertion
| General Information | |||
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| Symbol | Dmel\P{lacW}shgk03401 | Species | D. melanogaster |
| Name | FlyBase ID | FBti0004007 | |
| Feature type | transposable_element_insertion_site | ||
| Description | |||
| Inserted element | P{lacW} | Expression data | |
| Affected gene(s) | Ecol\lacZ, shg | Viability / fertility | |
| Causes allele(s) | Ecol\lacZshg-k03401, shgk03401 | Stock availability | 2 publicly available |
| LINE ID | l(2)k03401 | ||
| Genomic Location | |||
| Chromosomal location | 2R ( 57B16 ) | Sequence location | 2R:16,944,296..16,944,296 [-] |
Map (
GBrowse
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| Member of Large Scale Dataset(s) | |||
| Dataset |
A set of mutant stocks derived by insertional mutagenesis using the P-element construct P{lacW}; most lines have a lethal or sterile phenotype. The P{lacW} construct carries a w[+mC] mini-white visible marker, Ecol\lacZ enhancer trap sequences, and bacterial sequences that allow plasmid rescue (FBrf0049800).
Insertion lines from this collection were assessed for inclusion in the Gene Disruption Project collection.
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Recent Updates
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| Description |
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| FB2013_03 | |||
| FB2013_02 | |||
| All updates | Click here to see a list of all updates to this record from FB2010_08 and on. | ||
Detailed Mapping Data
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| Chromosome (arm) | |||
| Sequence Location |
2R:16,944,296..16,944,296 [-]
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| Orientation | |||
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Cytological location
(computed by FlyBase) |
57B16 ( inferred by FlyBase from sequence location )
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Cytological location
(reported) |
57B13-57B14 (in situ hybridization reported)
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Comments concerning
location |
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Sequence Data
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| Flanking sequence | |||
Inserted Element
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| Construct | P{lacW} | ||
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Location-dependent
role |
lacZ enhancer trap
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| Size | 10.691Kb | ||
| Associated alleles | |||
| Molecular map |
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Affected Gene(s)
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Insertion may
affect gene |
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Alleles and Phenotypes
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| Causes alleles |
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Lethality
References
lethal | embryonic stage | recessive
lethal | recessive
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Sterility
References
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Phenotype Manifest In
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border follicle cell
cardioblast
cardioblast & adherens junction
embryonic/first instar larval cuticle
embryonic/first instar larval cuticle | ventral
embryonic head
embryonic head & embryonic/first instar larval cuticle
ommatidial precursor cluster | cell non-autonomous | somatic clone
ommatidium
sensory mother cell | somatic clone
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Detailed Description
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Statement
Reference
Embryos that are maternally mutant for shg[k03401] display impaired wound repair. In comparison with wild-type controls, these embryos show excessive expansion upon ablation,
as well as defects in actin ring assembly. Nevertheless, these embryos heal eventually.
RhoL[10-161];shg[k03401] double homozygous mutant embryos display the normal number of haemocytes migrating into the tail region of the embryo.
p130CAS[1] homozygotes in combination with heterozygous shg[k03401] severely reduce viability.
shg[k03401]; p130CAS[1] double homozygotes arrest in late embryogenesis (and thereby do not hatch) and are considered semi-lethal. Athough most of
the embryos form at least partial cuticles, absence of p130CAS[1] significantly enhances shg[k03401] single mutant cuticle defects, with shg[k03401]; p130CAS[1] mutant embryos showing severe defects that essentially eliminate head and ventral cuticle, while incomplete dorsal closure
is reflected by the presence of holes in the dorsal cuticle.
shg[k03401] mutant larval brain cells expressing Ras85D[V12.Scer\UAS] under the control of Scer\GAL4[Act5C.PI] exhibit a weak invasive phenotype and can invade the ventral nerve cord (this phenotype occurs with 20% penetrance).
shg[k03401] mutant larval brain cells expressing both Ras85D[V12.Scer\UAS] and egr[Scer\UAS.cIa] under the control of Scer\GAL4[Act5C.PI] generate into invasive tumours that can invade the ventral nerve cord (this phenotype occurs with 88% penetrance).
Expression of Ras85D[V12.Scer\UAS], egr[Scer\UAS.cIa] and bsk[DN.Scer\UAS], under the control of Scer\GAL4[Act5C.PI] in shg[k03401] mutant larval cephalic complexes (brain, eye and antennal discs) induces tumor invasion of the ventral nerve cord.
Overexpression of hep[CA.Scer\UAS] in shg[k03401] mutant cephalic cells (i.e. cells in the larval brain and eye-antennal discs) expressing Ras85D[V12.Scer\UAS] results in neither enhanced tumour growth nor metastatic behaviour.
In late 3rd instar larval discs, at the stage of ommatidial rotation, clones of shgk03401 show robust rotation defects. Within mutant tissue, about 50% of ommatidia do not initiate rotation and several others rotate
less in comparison with wild-type clusters of the same stage. Rotation defects are apparent in both in small and large shgk03401 clones. There is no significant evidence for apicobasal polarity defects in the clones. Mosaic ommatidia containing shgk03401 clones do not have a higher probability of rotating correctly when both R3 and R4 are wild type. Wild-type preclusters that
are directly adjacent to shgk03401 interommatidial cells can also fail to rotate correctly.
The ommatidial under-rotation of Scer\GAL4hs.2sev>shgdCR3h.Scer\UAS.T:Avic\GFP-rs eyes is enhanced in Scer\GAL4hs.2sev>shgdCR3h.Scer\UAS.T:Avic\GFP-rs; shgk03401/+ flies.
Expression of shgScer\UAS.cSa under the control of Scer\GAL4hs.2sev increases the number of ommatidial clusters that initiate rotation correctly in shgk03401 clones.
The proportion of shgk03401 embryos showing the severe ventral cuticle phenotype is completely suppressed by rho9 and is enhanced by expression of btl::EgfrScer\UAS.T:λ\cI-DD under the control of Scer\GAL4da.G32.
The head cuticle is missing in homozygous embryos, although most embryos only show minor defects in the ventral trunk cuticle.
12% of embryos have a more severe phenotype in which the entire ventral cuticle is missing.
When homozygous somatic clones are made in the thoracic epithelium the orientation of division of pIIa relative to the pI
division axis is significantly more variable than wild-type. 39% of pIIa cells divide at an α angle of more than 20o (compared to 2% for wild-type).
Cardioblasts remain rounded in homozygous embryos, in contrast to wild type where they adopt a crescent shape. There is no
lumen between the cardioblasts and no adherens junctions between them. Amnioserosa cells are still attached to the ventral
surface of the cardioblasts, in contrast to wild type.
shgk03401/shgR6 flies are semi-viable. Border follicle cell migration is substantially delayed in many cases in shgk03401/shgR6 follicles. Approximately 65% of the border cell clusters that have not reached the oocyte at stage 10 are located between
nurse cells and only 35% of border cell clusters do not penetrate between nurse cells.
Homozygous female germ line clones give rise to egg chambers with misplaced oocytes in 18% of cases.
Class II allele: lacks most of the head cuticle and has small holes in the ventral cuticle. Germ line clones give rise to
only a few eggs, giving rise to embryos with Class III and class IV phenotypes.
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Expression Data
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| Reporter Expression | |||
| Additional Information | |||
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Statement
Reference
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| Marker for | |||
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Reflects
expression of |
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Reporter construct
used in assay |
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External Images
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| FlyView (LinkOut) | |||
Data on Genetic Line
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| Line ID |
l(2)k03401
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| Origin as a multiple insertion line | |||
Progenitor(s) within the Genome
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Related Aberration or Balancer
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| Aberration | |||
| Balancer | |||
Stocks
( 2 )
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| Bloomington | |||
| Kyoto | |||
Linkouts
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Comments
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P{lacW}shgk03401 insertion site reported as behind nucleotide 368 of GB:D28749 in the 5' UTR of shg. This was interpreted by the curator as meaning inserted after base 368. The insertion orientation was not reported.
This insertion was listed in the BDGP database as a lethal or sterile line during the period 1994-1999, but was not verified
as such prior to the summary publication (FBrf0111489). Reasons for excluding lines from the collection described in FBrf0111489 include presence of more than one P insertion on the mutant chromosome, separation of lethality (or sterility) from the location
of the insertion, and loss of lethality (or sterility) from the stock. Further information is available from http://www.fruitfly.org/bfd/
and from Dr. Allan Spradling (spradling@mail1.ciwemb.edu).
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Synonyms & Secondary IDs
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| Reported As | |||
| Symbol Synonym |
DE-Cad-lacZ
hgk03401
P{lacW}shgk03401
PlacWshgk03401
shgk03401
shgP34-1
shgP34-lacZ
shgP341
shg-lacZ
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| Secondary FlyBase IDs | |||
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References
( 29 )
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Recent research papers ( 1 )
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Recent Updates
