Allele Dmel\dpphr4
| General Information | |||
|---|---|---|---|
| Symbol | Dmel\dpphr4 | Species | D. melanogaster |
| Name | FlyBase ID | FBal0003066 | |
| Feature type | allele | Created / Updated | 2006-08-22/2006-08-22 |
| Associated gene | Dmel\dpp | ||
| Allele class | loss of function, hypomorph | ||
| Mutagen | ethyl methanesulfonate | ||
Nature of the Allele
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| Allele class | |||
| Mutagen | |||
| Mapped Features and Mutations | |||
Type Symbol & Location Additional Notes References | |||
| Associated Sequence Data | |||
| DDBJ
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EMBL / GenBank | DNA sequence Protein sequence Name | ||
| UniProtKB/Swiss-Prot | |||
| UniProtKB/TrEMBL | |||
| Progenitor genotype | |||
| Nature of the lesion | Statement Reference Point mutation. Nucleotide substitution: G2392A. Amino acid replacement: G402E. Amino acid 402 falls in the N-terminal pro region of the dpp protein. | ||
| Assay mode | |||
| Cytology | Polytene chromosomes normal. Polytene chromosomes normal. Polytene chromosomes normal. Polytene chromosomes normal. | ||
Phenotypic Data
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Phenotypic Class
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Phenotype Manifest In
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wing vein L2 (with dppd6) wing vein L4 (with dppd6) cytoneme & dorsal mesothoracic disc | somatic clone (with dpphr56) dorsal hair & embryo denticle belt & thorax wing vein L2 (with dppd5) wing vein L4 (with dppd5) wing vein L5 (with dpps6) wing vein L4 (with dpps6) | |||
Detailed Description
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Statement Reference Heterozygotes with class I dpp alleles have a wild type wing phenotype. Heterozygotes with class II allele dppd5 exhibit wings with a deletion of the anterior crossvein. Heterozygotes with class II allele dppd28 exhibit held out wings that are missing longitudinal and cross veins, deletion of tarsal claws, male terminalia and female analia. Heterozygotes with class III dpp alleles display reduced held out wings that are missing longitudinal and cross veins, capitella-less halteres, reduced eyes, legs missing claws and missing or rotated male terminalia or female analia. Heterozygotes with class IV dpp alleles display the same phenotype as class III heterozygotes with duplication of scutellar bristles, medial cleft of the dorsal notum, duplication of sex combs and partial duplication of the third antennal segment. Heterozygotes with class V dpp alleles rarely eclose, the surviors exhibit the wing, haltere, eye and terminalia defects. At 18oC the heterozygotes have less severe phenotypes. Abnormal development begins after germ band extension. Heterozygotes exhibit wings that are stumps. The wings are held out laterally instead of in line with the longitudinal axis of the body. Transheterozygotes with dppd-ho exhibit normally oriented wings. Fully rescued to adulthood by two wild type copies of dpp. Weak ventralised phenotype. Rings of ventral denticle belts differentiate around the entire dorsoventral axis, almost no dorsal hairs are seen and the antennal and maxillary sense organs are missing. Defective movements of the germ band: due to loss of the amnioserosa and because the dorsalmost cells have acquired the lateral fate of the dorsal ectoderm. Dorsal cell fates are deleted and ventrolateral mitotic domains are expanded. Dominant lethality less than 50%. Homozygous and transheterozygous embryos were examined with respect to 25 cuticular markers, results demonstrate a graded requirement for dpp along the dorso-ventral axis. Clonal analysis in the developing eye (using the FLP/FRT system) revealed nonautonomous phenotypes with large clones showing posterior-lateral eye parts missing. dppd6/dpphr4 individuals have a nearly full size wing, except for the absence of the anterior crossvein, a reduction in the distance between L4 and L5 and a small amount of ectopic vein between L2 and L3. If the flies are also heterozygous for (paternally contributed) sax1 or sax2, L2 is lost and L4 and L5 fused. Survival of heterozygotes is reduced if also heterozygous for certain alleles of tld. Embryos display a moderately ventralised phenotype, maternally contributed tkv alleles cause lethality. Homozygous embryos have 6 +/- 10 amnioserosa cells (compare to 164 +/- 23 cells in wild type embryos), many embryos lack amnioserosa entirely. Heterozygotes have 124 +/- 9 amnioserosa cells, a fraction of embryos die. Heterozygotes are viable, heterozygotes derived from Mad-/Mad+ mothers frequently die. Transheterozygotes with dppd6 have wings approximately half normal size and normal legs and eyes (less severe than dppd6 homozygous phenotype). When in combination with Df(2L)C28/Mad+ the transheterozygotes exhibit more severe phenotype, further reduction in wing blade, slight reduction in the eye and loss of tarsal claws. Trisomy for Mad (Dp(2;3)JS20) partially ameliorates transheterozygote phenotype, wings are of normal size and show residual vein fusions. Embryos show cuticular holes, disorganization of the head skeleton, internalization of the seventh and eighth abdominal segments and the filzkorper and a thoracic constriction. The first and second ventral denticle belts are expanded. A significant percentage of surviving transheterozygotes between dpphr56 and dpphr4 or dpphr27 have a split notum. Eye discs from dpphr4/dpphr56 larvae grown at 29oC for 48 hrs show several phenotypes including failure of retinal differentiation or partial ommatidial differentiation, ommatidia are retricted to the posterior part of the disc and absent from the lateral margins. Occasionally eye discs show normal size and morphology. These eye discs show anterior-most ommatidia that are abnormal mature in comparison to wild type ommatidia at similar positions. Also, cell death is observed ahead of the differentiated region. Surviving adults show slightly roughened eyes that are reduced along the anterior-posterior axis, consistent with a failure of normal morphgenetic progression. Homozygotes produce approximately 30 amnioserosa cells. This phenotype is not altered if the embryos are also carrying 2 copies of tsgtwi.PM. Females carrying temperature sensitive combinations dppe90/dpphr56 or dpphr4/dpphr56 after shifting to the restrictive temperature for one week show 40-50% of germaria that are significantly smaller than wild type. The effect is more pronounced in older females. Stem cell number is reduced, stem cells have differentiated into cysts. Some effect on egg chamber budding is seen. Approximately 50% of eggs laid by heterozygous females have shortened and abnormally shaped respiratory appendages. When single cell dpphr4/dpphr56 clones are made in the wing imaginal disc, cytonemes in the wing primordium are affected. At the non-permissive temperature (29oC) cytonemes emanating from cells at the lateral flanks of discs do not orient themselves towards the anterior posterior organiser (as those see in wild-type do). Cytonemes in these discs are also more numerous than in wild-type, and unlike in the wild-type, are sometimes seen to be bent, curved or crossing over each other. These effects are not observed if mutant larvae are heatshocked and returned to permissive temperatures. dpp[s6]/dpp[hr4] transheterozygotes are adult viable and exhibit occasional wing vein defects. Truncation of longitudinal vein 5 (L5) is observed in approximately 11% of adults, while 2% display truncations of L4 and L5.
dpp[s6]/dpp[hr4] Df(2L)C28 flies exhibit an increased frequency of L5 wing vein defects (95% compared to 11% in dpp[s6]/dpp[hr4] flies). Approximately 20% show defects in L4 and L5 wing veins, and 5% exhibit defects in L5 and L2, or L5 and the posterior crossvein, indicating an enhancement of the dpp[s6]/dpp[hr4] wing vein phenotype.
No lethality is associated with either the dpp[s6]/dpp[hr4] or dpp[s6]/dpp[hr4] Df(2L)C28 genotypes.
dpp[s6]/dpp[hr4] Df(3R)E40 flies exhibit an increased frequency of L5 wing vein defects (28% compared to 11% in dpp[s6]/dpp[hr4] flies). | |||
Interactions
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Phenotypic Class
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Enhanced by | |||
Statement Reference dpphr4 has lethal | embryonic stage | recessive phenotype, enhanceable | maternal effect by Df(2L)C144/+ dpphr4 has lethal | embryonic stage | recessive phenotype, enhanceable | maternal effect by Df(2L)DTD52-D51/+ dpphr4 has lethal | embryonic stage | recessive phenotype, enhanceable | maternal effect by T(2;3)DTD46.4/+ dpphr4 has lethal | embryonic stage | recessive phenotype, enhanceable | maternal effect by lillia16/lilli[+] | |||
NOT Enhancer of | |||
Statement Reference dpphr4/dpp[+] is a non-enhancer of visible phenotype of I-2Scer\UAS.T:Zzzz\His6,T:Hsap\MYC, Scer\GAL4vg.PM, putScer\UAS.cMa | |||
NOT Suppressor of | |||
Statement Reference dpphr4/dpp[+] is a non-suppressor of visible phenotype of I-2Scer\UAS.T:Zzzz\His6,T:Hsap\MYC, Scer\GAL4vg.PM, putScer\UAS.cMa | |||
Other | |||
Statement Reference | |||
Phenotype Manifest In
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Enhanced by | |||
Statement Reference dpphr4 has phenotype, enhanceable by Df(3L)66C-G28/+ | |||
NOT Enhanced by | |||
Statement Reference | |||
Enhancer of | |||
Statement Reference | |||
NOT Enhancer of | |||
Statement Reference dpphr4/dpp[+] is a non-enhancer of wing phenotype of I-2Scer\UAS.T:Zzzz\His6,T:Hsap\MYC, Scer\GAL4vg.PM, putScer\UAS.cMa | |||
Suppressor of | |||
Statement Reference | |||
NOT Suppressor of | |||
Statement Reference dpphr4/dpp[+] is a non-suppressor of wing phenotype of I-2Scer\UAS.T:Zzzz\His6,T:Hsap\MYC, Scer\GAL4vg.PM, putScer\UAS.cMa | |||
Other | |||
Statement Reference | |||
Additional Comments
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Genetic Interactions
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Statement Reference Enhancement of tor13D embryos: decrease in proportion of embryos that formed cuticle, or cuticle with denticles and increase in proportion of embryos that formed empty sacs. Increased dose of tld+ does not suppress the mutant phenotype. Homozygous lethal phenotype can be enhanced by Med, | |||
Nature of the Allele