2-3kb deletion near the 5' end of the nej gene.
nej3/+ adults expressing Hsap\HOXA9::Hsap\NUP98WT.UAS under the control of Scer\GAL4ey.PH show ectopic wing-like structures in the dorsal-anterior part of the eye.
Heterozygous nej3 significantly blocks or reduces tolerance to both benzyl alcohol and ethanol.
nej3 does not show any dominant suppressor (Su(var)) or enhancer (E(var)) of variegation activity. Any second site Su(var) mutations on the original chromosome can be separated from nej3 by recombination. Additional copies of nej+mSa (or nejT:SV5\V5) fail to rescue the Su(var) phenotype of the original chromosome carrying nej3.
Small homozygous clones can be recovered at a low frequency in the wing disc if they are induced in a Minute/+ background.
Mutants show developmental arrest soon after the prepupal-pupal transition, with persistent larval salivary glands.
The severe rough eye phenotype caused by expression of nejScer\UAS.T:SV5\V5 under the control of Scer\GAL4GMR.PF is suppressed if the flies also carry nej3/+. The very mild rough eye phenotype caused by expression of nejKIX.Scer\UAS under the control of Scer\GAL4GMR.PF is suppressed if the flies also carry nej3/+. The moderate rough eye phenotype caused by expression of nejΔNZK.Scer\UAS under the control of Scer\GAL4GMR.PF is enhanced if the flies also carry nej3/+. The severe rough eye phenotype caused by expression of nejΔBHQ.Scer\UAS under the control of Scer\GAL4GMR.PF is enhanced if the flies also carry nej3/+. The mild rough eye phenotype caused by expression of nejΔHQ.Scer\UAS under the control of Scer\GAL4GMR.PF is not affected if the flies also carry nej3/+. The severe rough eye phenotype caused by expression of nejΔQ.Scer\UAS under the control of Scer\GAL4hs.2sev is not affected if the flies also carry nej3/+.
Homozygous embryos that die at stage 9 often have a characteristic twisted phenotype.
Mutant stage 17 embryos do not show significant defects in the location or formation of the tracheal dorsal trunk branch, dorsal branch 10, spiracular branch 10 or the posterior spiracle.
Gastric caecae frequently fail to elongate. Formation of the first midgut constriction is often impeded. Dorsal trunk and visceral branches of the developing trachea are essentially normal. Branching defects occur, typically one of two dorsal branches fail to form and ganglionic branches fail to fuse.
Only 15% of nej3 hemizygotes die as embryos.
Embryos appear twisted at germ band elongation, clockwise or anticlockwise just behind the cephalic furrow, often with the posterior side down. The ventral and cephalic furrows appear normal, but the mesodermally derived internal tissues and the block of ectodermal cells are often missing. Embryos die at stage 9 or 10 during embryogenesis, some embryos survive to hatch. Cuticles of late-lethal embryos exhibit defects. No eggs are produced from germ line clones.
Hemizygous embryos generally die at stage 9 or 10, although some survive to hatching. Embryos are twisted from 0-70% egg length at germband elongation.
mei-41RT1, nej[+]/nej3 has abnormal mitotic cell cycle | dominant phenotype, suppressible by nej+t16
nej[+]/nej3 is an enhancer of decreased size | adult stage phenotype of Hsap\HOXA9::Hsap\NUP98WT.UAS, Scer\GAL4ey.PH
nej[+]/nej3 is an enhancer of visible | adult stage phenotype of Hsap\HOXA9::Hsap\NUP98WT.UAS, Scer\GAL4ey.PH
nej[+]/nej3 is an enhancer of partially lethal - majority die phenotype of Hsap\HTTQ93.ex1.UAS, Scer\GAL4elav-C155
nej3 is an enhancer of increased cell size | pupal stage phenotype of Myb1
nej3 is an enhancer of abnormal cell shape | pupal stage phenotype of Myb1
nej3 is an enhancer of melanotic mass phenotype phenotype of krzL8
nej3 is a non-enhancer of partially lethal - majority die phenotype of Dfd13/Dfd3
nej3 is a suppressor of visible phenotype of HUAS.cMa, Scer\GAL4GMR.PF
nej3 is a suppressor of visible phenotype of Scer\GAL4en-e16E, saxQ263D.UAS.cDa
mei-41RT1, nej[+]/nej3 has abnormal mitotic cell cycle | dominant phenotype
nej3, soD has increased cell death phenotype
nej[+]/nej3, soD has increased cell death phenotype
Myb1, nej3 has abnormal developmental rate phenotype
Myb2, nej3 has abnormal developmental rate phenotype
Myb1/Myb2, nej3 has abnormal developmental rate phenotype
nej3 has embryonic/larval midgut | embryonic stage phenotype, enhanceable by sggM11
nej3 has ventral denticle belt | anterior phenotype, suppressible by arm2
nej[+]/nej3 is an enhancer of eye phenotype of Hsap\HOXA9::Hsap\NUP98WT.UAS, Scer\GAL4ey.PH
nej3 is an enhancer of adult cuticle phenotype of Myb1
nej3 is an enhancer of adult abdominal segment phenotype of Myb1
nej3 is an enhancer of nuclear chromosome phenotype of Myb1
nej3 is an enhancer of wing hair | precursor | increased number phenotype of Myb1
nej3 is an enhancer of wing vein L4 phenotype of dpps1
nej3 is an enhancer of wing vein L2 phenotype of dpps1
nej[+]/nej3 is a non-enhancer of adult thorax | pharate adult stage phenotype of chm14
nej3 is a non-enhancer of centrosome phenotype of Myb1
nej3, Scer\GAL430A is a non-enhancer of wing phenotype of Pka-C1UAS.cKa, Scer\GAL430A
nej[+]/nej3 is a suppressor of chaeta | increased number phenotype of gcmPyx
nej3 is a suppressor of eye phenotype of HUAS.cMa, Scer\GAL4GMR.PF
nej3 is a suppressor of wing margin phenotype of ciD
nej[+]/nej3 is a suppressor of wing phenotype of Scer\GAL4en-e16E, shgUAS.cSa
nej[+]/nej3 is a suppressor of trichome of the posterior wing margin phenotype of ciD
nej[+]/nej3 is a non-suppressor of adult thorax | pharate adult stage phenotype of chm14
nej3, Scer\GAL430A is a non-suppressor of wing phenotype of Pka-C1UAS.cKa, Scer\GAL430A
Hsap\HOXA9::Hsap\NUP98WT.UAS, Scer\GAL4ey.PH, nej[+]/nej3 has wing | ectopic phenotype
The number of mitotic cells is slightly but significantly higher in hydroxyurea-treated discs from mei-41RT1/nej3 transheterozygotes compared with heterozygous mei-41RT1 controls.
Expression of nej+t16 suppresses the mitosis phenotypes in response to hydroxyurea seen in mei-41RT1/nej3 transheterozygotes.
When nej3 is added to Myb1 animals at 18oC a dramatic reduction in viability is seen as well as a significantly delayed emergence of surviving animals. When nej3 is added to Myb1/Myb2 animals an even more marked effect is seen on viability and emergence. When nej3 is added to Myb1 animals at 18oC no effect is seen on viability or any delay in development seen. When nej3/+ is added to Myb1 animals at 18oC an enhancement of the multiple wing hair phenotype is seen. The abdomen defects are also enhanced. White differentiated cuticle is present between most segments and along the dorsal midline, indicating fusion defects. Defects in wing cell and nucleus size are also enhanced, nuclei and cells are larger and more variable in size. The mitotic index phenotype is also enhanced in these mutants, though no increase in the rate of centrosomal and chromosomal defects is seen.
Double mutants for sggM11 and nej3 show a worse gut phenotype than do nej3 single mutants. The embryonic epidmeris phenotype is suppressed in double mutants with arm2. Dominantly suppresses the wing margin phenotype of shgScer\UAS.cSa, Scer\GAL4en-e16E.
One copy of nej3 enhances the reduction in eclosion rate seen when Hsap\HTTQ93.ex1p.Scer\UAS is expressed under the control of Scer\GAL4elav-C155. These flies have a relative eclosion rate of 67.3%.