C17189991T
Q374term | baz-PA; Q395term | baz-PB; Q374term | baz-PC; Q395term | baz-PD
Q374term
Site of nucleotide substitution in mutant inferred by FlyBase based on reported amino acid change.
Amino acid replacement: Q374term.
embryonic neuroblast & spindle | germ-line clone
eye photoreceptor cell & eye disc & pupa | somatic clone
eye photoreceptor cell & eye disc & pupa | somatic clone | cell non-autonomous
photoreceptor cell & eye | somatic clone
Homozygous clones in the wing disc survive and do not show polarity defects.
Somatic clones of baz4 homozygous mutant cells in the pupal eye disc show extra inter-ommatidial cells and increased frequency of disruptions in the structure of adherens junctions.
Centrosome asymmetry during cytokinesis in mutant pI (sensory organ precursor) cells in the notum is identical to that seen in wild-type pI cells.
Mutant egg chambers show a loss of the anterolateral enrichment of actin normally seen in the oocyte.
The epithelia become disorganised in baz4 zygotic mutants after stages 11-13.
Dead embryos derived from a cross of heterozygous females to wild-type males have cuticles which are largely intact with one or two small holes often at the head.
Stage 11 embryos lacking both maternal and zygotic baz4 exhibit lost or severely disrupted tubule cell polarity.
At early and mid cellularization, baz4 mutants exhibit apical surface puncta and basal junctions. At late cellularization, apical surface puncta persist abnormally compared to wild-type controls. baz4 mutants continue to have apical surface puncta as gastrulations begins, along with abnormal cell shapes.
baz4 mutant embryos display disorganised nervous systems, but the nervous system is not hyper-neuralised.
baz4/Y zygotic mutants die as embryos, typically with one hole in the embryonic cuticle, due to epithelial polarity defects.
Somatic clones homozygous for baz4 in the ovarian follicle cells cause discontinuities and multilayering of the epithelium. When the majority of border cells are part of a clone, the border cell cluster fails to migrate. However, clusters with a minority of mutant cells migrate normally. The morphology of mutant clusters is frequently abnormal - clusters are often elongated, sometimes with cells trailing behind the migrating cluster.
Border cell migration is incomplete in 14% of stage 10 egg chambers from (bazdsRNA.Sym.Scer\UAS)X2; Scer\GAL4slbo.2.6 flies. This increases to 33% in flies also heterozygous for baz4.
heterozygotes have a decreased number of synaptic boutons at neuromuscular junctions.
neuroblast divisions that produce equal-sized daughter cells are not seen in baz4 mutant embryos. In telophase pI cells in the majority of baz4 somatic clones (6/9) the distance from cleavage furrow to the anterior centrosome is greater than that to the posterior centrosome, but it is not clear whether spindle displacement is affected.
Marker analysis suggests that apical-basal polarity is disrupted in the pupal eye disc photoreceptor cells that are part of baz4 mutant clones. In addition. the shape and polarity of wild-type photoreceptors in mosaic ommatidia is often disrupted, although not as severely as in mutant cells. Photoreceptor differentiation, numbers and pattern are all normal in these clones at early pupal stages. However, baz4 mutant clones do not survive in the developing eye at late pupal stages, and the resulting adults eyes have many malformed ommatidia containing fewer than 7 photoreceptors.
Homozygous embryos have holes in the cuticle.
The blastoderm epithelium is multilayered and the cells show a very irregular shape at gastrulation in mutant embryos derived from homozygous female germline clones. In hemizygous embryos derived from homozygous female germline clones abnormal orientation of metaphase plates with respect to the surface of the embryo is seen. In heterozygous embryos derived from homozygous female germline clones the neuroectodermal epithelium almost completely disintegrates. Many mutant embryos derived from homozygous female germline clones do not produce cuticle. Zygotic baz4 mutant embryos form cuticles with large ventral holes and head defects.
Homozygous embryos derived from homozygous female germline clones (lacking both maternal and zygotic baz function) show a fully penetrant spindle orientation defect in neuroblasts. The position of the budding ganglion mother cell with respect to the apical-basal axis of the neuroblast is random.
Homozygous embryos derived from germ line clones exhibit severe malformations or an absence of epidermis. They also exhibit abnormal zonula adherens formation and mislocalisation of membrane protein neurotactin.
baz4 mutant embryos have large dorsal and ventral holes.
baz4 has lethal | embryonic stage phenotype, enhanceable by Dhc64C6-6/Dhc64C6-8
baz4 has abnormal cell polarity phenotype, enhanceable by Dhc64C6-6/Dhc64C6-8
baz4 has abnormal neuroanatomy phenotype, non-enhanceable by aPKCExc55
baz4 has abnormal neuroanatomy phenotype, non-suppressible by aPKCExc55
baz4/baz[+] is an enhancer of abnormal planar polarity phenotype of Scer\GAL4hs.2sev, dgoUAS.cFa
baz4/baz[+] is an enhancer of visible | dominant phenotype of Fmr1sev.PW
baz4/baz4 is an enhancer | somatic clone of neoplasia | somatic clone phenotype of Ras85DV12.UAS, Scer\GAL4Act5C.PI/Scer\GAL4Act5C.PI
baz4 is a suppressor of visible phenotype of HScer\UAS.cMa/HUAS.cMa, Scer\GAL4GMR.PF/Scer\GAL4GMR.PF
baz4/baz[+] is a non-suppressor of abnormal neuroanatomy phenotype of aPKCExc55
baz4/baz[+], wtsx1 has abnormal neuroanatomy | embryonic stage phenotype
baz4 has embryonic/first instar larval cuticle phenotype, enhanceable by zip[+]/zip1
baz4 has embryonic/larval cuticle phenotype, enhanceable by crb11A22/crb[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by shg[+]/shgR69
baz4 has embryonic/larval cuticle phenotype, enhanceable by aPKCk06403/aPKC[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by ed[+]/edkg
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2L)Exel6039/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2L)ED1473/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2L)Exel7027/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2L)Exel6012/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2R)Exel7121/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2R)Exel7144/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2R)ED3943/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2R)ED1742/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2R)ED3728/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2R)ED1791/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(2R)ED3610/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by +/Df(3L)ED4287
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(3L)ED5017/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by +/Df(3L)ED201
baz4 has embryonic/larval cuticle phenotype, enhanceable by +/Df(3L)ED225
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(3R)Exel6204/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by +/Df(3R)ED5559
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(3R)Exel6211/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(3R)ED5623/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(3R)ED6220/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(3R)Exel6196/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(3R)ED5429/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by Df(3R)ED6187/+
baz4 has embryonic/larval cuticle phenotype, enhanceable by fjd1/fj[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by par-1W3/par-1[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by muskelinf04338/muskelin[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by Septin5f04717/Sep5[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by alt[+]/altKG08013
baz4 has embryonic/larval cuticle phenotype, enhanceable by Rho172O/Rho1[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by asp1/asp[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by Arf79F[+]/Arf79FC005
baz4 has embryonic/larval cuticle phenotype, enhanceable by hk[+]/hook1
baz4 has embryonic/larval cuticle phenotype, enhanceable by Asap1[+]/AsapKG03963
baz4 has embryonic/larval cuticle phenotype, enhanceable by CG1951EY00129/CG1951[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by sds22e00975/sds22[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by Cul5EY00051/Cul-5[+]
baz4 has embryonic/larval cuticle phenotype, enhanceable by Roc2[+]/Roc2EP2487
baz4 has embryonic/larval cuticle phenotype, enhanceable by CG5823[+]/CG5823f04935
baz4 has embryonic/larval cuticle phenotype, enhanceable by CG10702[+]/CG10702f03893
baz4 has embryonic/larval cuticle phenotype, enhanceable by CG11210[+]/Tmem63KG08546
baz4 has embryonic/first instar larval cuticle phenotype, enhanceable by Dhc64C6-6/Dhc64C6-8
baz4/baz[+] is an enhancer of ommatidium phenotype of Scer\GAL4hs.2sev, dgoUAS.cFa
baz4/baz[+] is an enhancer of oocyte nucleus | oogenesis stage S9 phenotype of sktlΔ15/sktl2.3
baz4/baz[+] is an enhancer of oocyte nucleus | oogenesis stage S10 phenotype of sktlΔ15/sktl2.3
baz4/baz[+] is an enhancer of ommatidium phenotype of Fmr1sev.PW
baz4/baz[+] is a non-enhancer of wing hair phenotype of Scer\GAL4hs.2sev, dgoUAS.cFa
baz4/baz[+] is a non-enhancer of ommatidium phenotype of Vangstbm-153
baz4 is a suppressor of eye phenotype of HScer\UAS.cMa/HUAS.cMa, Scer\GAL4GMR.PF/Scer\GAL4GMR.PF
baz4/baz[+] is a non-suppressor of wing hair phenotype of Scer\GAL4hs.2sev, dgoUAS.cFa
baz4/baz[+] is a non-suppressor of ommatidium phenotype of Vangstbm-153
baz4/baz[+], wtsx1 has RP2 motor neuron | embryonic stage phenotype
baz4, sdtXN/sdtXN has embryonic/first instar larval cuticle phenotype
baz4/+ enhances the planar cell polarity (PCP) defects in the eye induced by the overexpression of dgoScer\UAS.cFa under the control of Scer\GAL4hs.2sev.
The cuticle phenotype of dead embryos derived from baz4/+ embryos derived from a cross of baz4/+ females to wild-type males is enhanced if the females also carry one copy of crb11A22, shgR69, aPKCk06403, edkg, Df(2L)Exel6039, Df(2L)ED1473, Df(2L)Exel7027, Df(2L)Exel6012, Df(2R)Exel7121, Df(2R)Exel7144, Df(2R)ED3943, Df(2R)ED1742, Df(2R)ED3728, Df(2R)ED1791, Df(2R)ED3610, Df(3L)ED4287, Df(3L)ED5017, Df(3L)ED201, Df(3L)ED225, Df(3R)Exel6204, Df(3R)ED5559, Df(3R)Exel6211, Df(3R)ED5623, Df(3R)ED6220, Df(3R)Exel6196, Df(3R)ED5429 or Df(3R)ED6187.
The cuticle phenotype of dead embryos derived from baz4/+ embryos derived from a cross of baz4/+ females to wild-type males is enhanced if the females also carry one copy of fjd1, par-1W3, muskelinf04338, Sep5f04717, altKG08013, Rho172O, asp1, Arf79FC005, hk1, Asap1KG03963, CG1951EY00129, sds22e00975, Cul-5EY00051, Roc2EP2487, CG5823f04935, CG10702f03893 or CG11210KG08546.
Heterozygosity for baz4 has no effect on the frequency of ommatidia that show planar cell polarity defects in Vangstbm-153 homozygotes.
baz4 sdtXP follicle cell clones expressing bazS151A.S1085A.Scer\UAS.P\T.T:Avic\GFP under the control of Scer\GAL4e22c lose their epithelial organisation and form multilayers of cells.
Marked clones in the eye disc expressing Ras85DV12.Scer\UAS under the control of Scer\GAL4Act5C.PI and which are also homozygous for baz4 show metastatic behaviour.
baz4 is rescued by bazC.UASp.EGFP/Scer\GAL4VP16.mat.αTub67C
baz4 is rescued by bazΔPDZ1.UASp.EGFP/Scer\GAL4VP16.mat.αTub67C
baz4 is rescued by bazΔPDZ3.UASp.EGFP/Scer\GAL4VP16.mat.αTub67C
baz4 is rescued by bazUASp.GFP/Scer\GAL4Act5C.PI/Scer\GAL4Act5C.PI
baz4 is rescued by bazUASp.GFP/Scer\GAL4VP16.mat.αTub67C
baz4 is rescued by bazS980E.UASp.mGFP6/Scer\GAL4Act5C.PI/Scer\GAL4Act5C.PI
baz4 is partially rescued by bazΔPDZ2.UASp.EGFP/Scer\GAL4VP16.mat.αTub67C
baz4 is partially rescued by bazΔPDZ1-2.UASp.EGFP/Scer\GAL4VP16.mat.αTub67C
baz4 is partially rescued by bazΔPDZ1+3.UASp.EGFP/Scer\GAL4VP16.mat.αTub67C
baz4 is partially rescued by bazΔPDZ2-3.UASp.EGFP/Scer\GAL4VP16.mat.αTub67C
baz4 is partially rescued by bazΔPDZ1-3.UASp.EGFP/Scer\GAL4VP16.mat.αTub67C
baz4 is not rescued by bazS980A.UASp.mGFP6/Scer\GAL4VP16.mat.αTub67C
Expression of bazScer\UAS.P\T.T:Avic\GFP or bazS980E.Scer\UAS.P\T.T:Avic\GFP-m6 under the control of Scer\GAL4Act5C.PI in clones in the follicular epithelium rescues the epithelial organisation defects seen in the follicle cells of baz4 females.
The epithelial organisation defects seen in baz4 zygotic mutant embryos are rescued by zygotic expression of bazScer\UAS.P\T.T:Avic\GFP or bazS980E.Scer\UAS.P\T.T:Avic\GFP-m6 under the control of Scer\GAL4mat.αTub67C.T:Hsim\VP16.
The epithelial organisation defects seen in baz4 zygotic mutant embryos are not rescued by zygotic expression of bazS980A.Scer\UAS.P\T.T:Avic\GFP-m6 under the control of Scer\GAL4mat.αTub67C.T:Hsim\VP16.