Amino acid replacement: W180term.
Nucleotide substitution: G1034A.
Molecular lesion unknown.
G16039098A
G1034A
W180term | pnr-PA; W128term | pnr-PB; W180term | pnr-PC; W128term | pnr-PD
W180term
G to A nucleotide change at the second or third position of the wild type Trp codon leads to a nonsense mutation (exact site of mutation unspecified). The mutation was annotated at the second base of the codon.
Heterozygous adults show an increase in heart arrest/fibrillation compared to control flies upon electrical pacing of the heart. The severity of the defect increases with age.
Heterozygous adults show an increase in irregular heart rate compared to controls. The mean diastolic interval length is increased compared to controls.
Single cell class IV dendrite arborisation (da) neuron clones that are homozygous for pnr1 do not show defects in the establishment or maintenance of dendritic tiling.
In pnr1 mutant embryos, the number of cardioblasts is strongly reduced and the embryos fail to form a closed heart tube.
In mutant embryos most cardioblasts so not develop, although short stretches of cardioblast still arise. A strong decrease in pericardial cells is also seen.
Homozygous embryos have a severe dorsal hole. Cardial cells are absent, and there is an excess of eve-expressing pericardial cells.
Homozygous embryos show bunching of epidermal segments at the end of dorsal closure.
Homozygotes exhibit a dorsal hole that is broader than that of pnrVX6 or Df(3R)sbd45 homozygotes. Heterozygotes with pnrD3 give adult escapers and heterozygotes with pnrVX5 show extra dorsocentrals. Mitotic clones in the thorax adjacent to the thoracic midline cause a sizeable bilateral cleft involving most of the scutum causing the entire scutellum to disappear.
embryonic lethal. Dorsal anterior of embryo open.
pnr1 has scutellum phenotype, enhanceable by XNPUY3132/Scer\GAL4455.2
pnr1 has adult heart phenotype, non-enhanceable by tin346/tin[+]
pnr1 has adult heart phenotype, non-enhanceable by Df(3R)GC14/+
pnr1 has adult heart phenotype, non-enhanceable by H15nmr-614/H15[+]
pnr1 has adult heart phenotype, non-enhanceable by Df(2L)Exel6012/+
pnr1 has dorsal vessel wall cell phenotype, non-enhanceable by pntS012309
pnr1 has adult heart phenotype, non-suppressible by tin346/tin[+]
pnr1 has adult heart phenotype, non-suppressible by Df(3R)GC14/+
pnr1 has adult heart phenotype, non-suppressible by H15nmr-614/H15[+]
pnr1 has adult heart phenotype, non-suppressible by Df(2L)Exel6012/+
pnr1 has dorsal vessel wall cell phenotype, non-suppressible by pntS012309
Expression of XNPUY3132 under the control of Scer\GAL4455.2 enhances the penetrance of the scutellar phenotypes seen in pnr1 heterozygotes.
The increase in heart arrest/fibrillation upon electrical pacing that is seen in pnr1/+ adults is not significantly altered by tin346/+ or Df(3R)GC14/+.
The increase in heart arrest/fibrillation upon electrical pacing that is seen in pnr1/+ adults is not significantly altered by H15nmr-614/+ or Df(2L)Exel6012/+.
In pnr1, pntS012309 embryos local overproduction of cardioblasts are seen as seen in pnr1 embryos.
pnr1 is partially rescued by pnrUAS.cHa/Scer\GAL4Mef2.PR
pnr1 is partially rescued by pnrUAS.cHa/Scer\GAL4tin.CΔ4
pnr1 is partially rescued by pnrUAS.cHa/Scer\GAL4twi.PG/Scer\GAL4how-24B
Class 2 pnr allele: lethal recessive allele. Allelic series according to the extent of the dorsal hole: pnr1 > Df(3R)sbd45 = pnrVX6 = pnrVP8 = pnrD1 > pnrD3.