Polytene chromosomes normal.
Coordinates of the lesion are the position in the 2-μ-4a spliced form of pb.
Nucleotide substitution: C1819T.
Amino acid replacement: Q607term.
C6709698T
C1819T
Q607term | pb-PA; Q602term | pb-PB; Q602term | pb-PC; Q597term | pb-PD
Q607term
Reported coordinates are with respect to pb-RA and pb-PA.
labellar cap (with pb20)
labial segment (with pb5)
maxillary palp (with pb20)
pseudotrachea (with pb5)
pseudotrachea (with pb13)
pseudotrachea (with pb20)
Flies show transformation of the distal labial palps to antennal aristae. Some pseudotracheal tissue remains on the proximo-medial part of each palp.
Homozygotes show a partial transformation of the labial palps to antennal aristae.
The labial palp is transformed to antenna.
Hemizygotes have transformations that range from a predominantly antennal morphology to a mixture of antennal-like and leg-like characteristics.
Transformation of the first three pseudotracheal rows of the labial palps to antenna or leg identity.
antenna
pb5/pb4 has labial segment phenotype, enhanceable by skdpap-1
pb5/pb4 has pseudotrachea phenotype, enhanceable by skdpap-1
pb5/pb4 has labial segment phenotype, enhanceable by skdpap-1/MED17s2956
pb5/pb4 has pseudotrachea phenotype, enhanceable by skdpap-1/MED17s2956
pb5/pb4 has labellum phenotype, enhanceable by Df(3R)ΔC40b
pb4 has labellum phenotype, suppressible by RasGAP1sxt-BJ61
pb5/pb4, skdpap-1 has tarsal segment | ectopic phenotype
pb5/pb4, skdpap-1 has prothoracic leg | ectopic phenotype
MED17s2956, pb5/pb4, skdpap-1 has tarsal segment | ectopic phenotype
MED17s2956, pb5/pb4, skdpap-1 has prothoracic leg | ectopic phenotype
MED17s2956, pb5/pb4, skdpap-53 has tarsal segment | ectopic phenotype
MED17s2956, pb5/pb4, skdpap-53 has prothoracic leg | ectopic phenotype
The addition of a combination of skdpap-1 and MED17s2956 enhances the transformation phenotype seen in the labium of pb4/pb5 flies. Instead of transformation to antennal structures, a transformation to T1 leg structures (including sex comb teeth and claws) is seen. The addition of skdpap-1 enhances the transformation phenotype seen in the labium of pb4/pb5 flies. Instead of transformation to antennal structures, a transformation to T1 leg structures (including claws) is seen.
The transformation of the labium to aristal structures seen in pb4 homozygotes is altered towards wild-type if the flies also carry one copy of Gap1sxt-BJ61. pb4/pb5 flies also carrying one copy of Df(3R)ΔC40b generally have a more severe labial palp mutant phenotype, including the appearance of prothorax-specific sex comb teeth and distal claws.
pb4 is partially rescued by pbRev2.HSPB
pb4 is partially rescued by pbRev19.HSPB
pb4 is partially rescued by pbRev20.HSPB
pb4 is not rescued by pbRev5.HSPB
pb4 is not rescued by pbRev14.HSPB
pb4 is not rescued by pbRev1.HSPB
pb4 is not rescued by pbRev23.HSPB
pb4 is not rescued by pbRev9.HSPB
pb4 is not rescued by pbRev3.HSPB
pb4 is not rescued by pbRev17.HSPB
pb4 is not rescued by pbRev3.HSPB
The labial palp phenotype is fully rescued by pbhs.PB, is not rescued by pbRev9.HSPB, pbRev14.HSPB, pbRev23.HSPB, pbRev1.HSPB, pbRev5.HSPB, pbRev17.HSPB or pbRev3.HSPB, and is partially rescued by pbRev2.HSPB, pbRev19.HSPB or pbRev20.HSPB.
Duncan and Kaufman.