wing margin & sensory neuron | somatic clone
brnpr-3/+ flies show a wild-type number of DLM fibers and normal TDT patterning in the adult thorax.
brnpr-3 mutants exhibit a significant reduction in encapsulation response. Lymph glands of older, developmentally arrested mutant larvae are of normal size and do not show hypertrophy.
brnpr-3/Y eye discs show ommatidial disorganisation and signs of furrow failure, including mature ommatidial clusters at the furrow. Homozygous clones in the eye disc show defects in ommatidial organisation, including the wrong number of photoreceptors in clusters. Excess numbers of R8 cells in a cluster are seen. Homozygous clones spanning the morphogenetic furrow are not associated with any retardation of the furrow. Clones at the posterior margin of the disc do not show any visible defects in furrow initiation. Homozygous clones in the adult eye result in a scar.
Homozygotes arrest development at the end of the larval period, do not pupariate and die after several days as wandering third instar larvae.
Lethality acts in the late third instar.
Lethality acts at the late third instar stage.
Failure of salivary gland degeneration. Reduction in dorso-ventral class of indirect flight muscles.
Wandering third instar larvae initially show normal CNS histology, later widespread loss of tissue integrity is seen.
Imaginal discs of homozygous larvae are normal.
Imaginal discs form swollen vesicles.
No maternal effect.
Larvae do not pupate, but can survive for weeks after reaching the size of the mature wild-type larva. Larval imaginal discs are normal on the 4th day after hatching, however they become bloated and a highly distorted by the 8th-10th day of larval life. The ring gland is normal in size on the 8th-10th day of larval life.
brrbp-2/brnpr-3 has lethal - all die during P-stage phenotype, enhanceable by Met3/Met3
brnpr-3/brnpr-3 is a suppressor of abnormal cell number | somatic clone | P-stage phenotype of EcRB1-ΔC655.F645A.UAS, Scer\GAL4αTub84B.PL
Mef2P544, brnpr-3/br[+] has mesothoracic tergotrochanter muscle cell phenotype, enhanceable by twi1/twi[+]
brnpr-3/br[+], twi1 has dorsal longitudinal indirect flight muscle cell phenotype, enhanceable by Mef2[+]/Mef2P544
brnpr-3 has mesothoracic tergotrochanter muscle cell phenotype, enhanceable by Mef2[+]/twi1/Mef2P544/twi[+]
brnpr-3/br[+] is an enhancer of mesothoracic tergotrochanter muscle cell phenotype of Mef2P544, twi1/twi[+]
brnpr-3/br[+] is an enhancer of mesothoracic tergotrochanter muscle cell phenotype of Mef2P544
Mef2[+], brnpr-3, Mef2P544, br[+] is an enhancer of mesothoracic tergotrochanter muscle cell phenotype of twi1
brnpr-3/brnpr-3 is a suppressor of enteroendocrine cell | somatic clone | P-stage | decreased number phenotype of EcRB1-ΔC655.F645A.UAS, Scer\GAL4αTub84B.PL
Mef2P544, brnpr-3/br[+], twi1/twi[+] has dorsal longitudinal indirect flight muscle cell phenotype
Mef2[+]/Mef2P544, brnpr-3, twi1/twi[+] has dorsal longitudinal indirect flight muscle cell phenotype
brnpr-3/br[+], twi1 has dorsal longitudinal indirect flight muscle cell phenotype
There is a significant reduction in the number of DLM fibers in brnpr-3/+; twi1/+ double mutants (5.8 fibers vs 6 in wild type) and an even greater reduction in brnpr-3/+; twi1/+, Mef2P544/+ triple mutants (5.2 fibers). However, no such reduction is seen in brnpr-3/+; Mef2P544/+ double mutants.
brnpr-3/+; Mef2P544/+ double heterozygotes display higher levels of defects in TDT organization than either single heterozygote, including the presence of ectopic fibers in the lumen. 82% of brnpr-3/+; twi1/+, Mef2P544/+ triple mutants show defects in TDT patterning (a higher level than any of the double mutant combinations), including additional small cells, internal fibers and the rerouting of some fibers to the periphery.
brnpr-3 is not rescued by brBRcore.Z4.hs
brnpr-3 is not rescued by brBRcore.Q1.Z1.hs
brnpr-3 is not rescued by brBRcore.NS.Z3.hs
brnpr-3 is not rescued by brBRcore.TNT.Q1.Z1.hs
Lethality is not rescued by brBRcore.Q1.Z1.hs, brBRcore.TNT.Q1.Z1.hs, brZ2.hs, brBRcore.NS.Z3.hs or brBRcore.Z4.hs when expressed using heat shocks of either 33oC or 37oC. brnpr-3 third instar larvae expressing brZ2.hs show further development than control brnpr-3 larvae, forming normal looking puparia with everted spiracles, a tanned cuticle and imaginal discs that have initiated morphogenesis.
Kiss.
Analysis of Ecol\lacZSgs3.GLX3.3 expression in salivary glands mosaic for brnpr-3 suggests a cell-autonomous requirement for br+ function for the expression of Sgs3 in the salivary gland.