Consists of a deletion that removes the 5' end of the Bin1 gene. Retains part of the original P{EP}sraEP3462 inserted transposon.
Imprecise excision of P{EP}sraEP3462 has removed the N-terminal 2/3 of Bin1 and 23bp of the 5' UTR of next ORF, sra.
Approximate boundaries of the Bin1R7-18 deletion, resulting from excision of P{EP}sraEP3462 and reported as removing 601 bases from the P insertion site including 448 of the 633 bases of Bin1.
visible (with Df(3R)sbd45)
Approximately 80% of Bin1R7-18/Df(3R)sbd45 males show transformation of A6 to A5, as judged by the presence of at least one bristle on the sixth sternite.
Bin1R7-18/+ enhances the silencing of the w marker gene which is seen in the P{UAS-lacZ.Abd-B.24F6}GCD-6 insertion, such that the eye is less pigmented in the presence of Bin1R7-18/+.
Homozygous Bin1R7-18 mutants are lethal, with arrest occurring most often during pupal stages of development. About 10% are also larval lethal. There is no embryonic lethality. The larval and pupal lethality is temperature sensitive; at 22oC homozygotes hatch normally and develop into viable adults. Homozygous Bin1R7-18 females produce eggs in which about 90% fail to develop. Although oogenesis appears normal, the eggs arrest prior to pronuclear fusion. At 29oC progeny from heterozygous mothers display defects. Eggs develop but about 8% are embryonic lethal. the embryos have normal-looking cuticles and mouth hooks, but they die at late stages just prior to hatching as first instar larvae. Developing embryos from homozygous mutant germ-line clones show about 12% embryonic lethality at 25oC which increases to 21% at 29oC. These embryos typically have holes or patches of naked cuticle in the anterior and thoracic regions. In some embryos, the head skeleton is collapsed, and a smaller number of embryos have segmentation defects. Larvae that hatch survive to adulthood if they have wild-type Bin1 contributed from the male.
The frequency of homozygous mutants recovered is very low (~1 in 300). About half of the heterozygous adults show mutant wing phenotypes. A large percent of eggs from homozygous mothers burst upon removal of chorion. Almost all unhatched embryos have head defects. A small number of first instar larvae die after hatching and ~10% show segmentation defects. About half of the third instar larvae develop black masses and die as they pupate. Surviving adults show mild segmentation defects.
Df(3R)sbd45/Bin1R7-18 is a suppressor of visible | recessive phenotype of sdFab-X
Bin1R7-18, sra[+]/sraA108 has female semi-fertile phenotype
Bin1R7-18, sra[+]/sraA426 has female semi-fertile phenotype
Bin1R7-18, bcd6 has embryonic head | maternal effect phenotype, enhanceable by HDAC104556
Df(3R)sbd45/Bin1R7-18 is a suppressor of wing blade phenotype of sdFab-X
Bin1[+]/Bin1R7-18 is a suppressor of wing blade phenotype of sdFab-X
Bin1R7-18, bcd6 has embryonic head | maternal effect phenotype
Bin1R7-18, bcd6 has dorsal arm of apodeme of rostrum-haustellum joint | maternal effect phenotype
Bin1R7-18, bcd6 has epipharyngeal sclerite | maternal effect phenotype
Bin1R7-18, bcd6 has embryonic/larval mouth | maternal effect phenotype
Bin1R7-18, bcd6 has dorsal bridge | maternal effect phenotype
Bin1R7-18, bcd6 has median tooth | maternal effect phenotype
TrlR67/Bin1R7-18 and Rpd3def24/Bin1R7-18 transheterozygous males do not show transformation of A6 to A5.
The wing blade destruction phenotype of homozygous sdFab-X females is strongly suppressed by Bin1R7-18/Df(3R)sbd45 : 13% of the double mutants show wing blade destruction in one wing, and 4% show wing blade destruction in both wings.
The wing blade destruction phenotype of homozygous sdFab-X females is significantly suppressed by Bin1R7-18/+ (39% show wing blade destruction in one wing, 36% show wing blade destruction in both wings).
9% of bcd6/Bin1R7-18 double heterozygotes die as unhatched embryos with serious head defects including missing mouth parts. These larvae are missing labral structures most frequently the labrum itself and the epistomal sclerite. In some cases the dorsal bridge, dorsal bridge, dorsal and ventral arms, and post pharyngeal wall are absent or reduced in size.
Df(3R)sbd45/Bin1R7-18 is partially rescued by Bin1Tag:HA
Bin1T:Ivir\HA1 partially rescues the A6 to A5 transformation seen in Bin1R7-18/Df(3R)sbd45 males, reducing the fraction of males that contain at least one bristle on the sixth sternite from approximately 80% to 50%, and also reducing the severity of the transformation (the frequency of males having more than 2 bristles on the sixth sternite is reduced from 34% to 4%).