Amino acid replacement: Q226term.
C7330403T
Q226term | mus312-PA; Q226term | mus312-PD; Q226term | mus312-PE
Q226term
Site of nucleotide substitution in mutant inferred by FlyBase based on reported amino acid change.
viable (with mus312Z1973)
X-ray irradiation of wild-type third-instar larvae induces cell cycle arrest within 1 hour. In contrast, X-ray irradiation of mus312Z1973/mus312D1 mutant larvae fails to induce cell cycle arrest.
X-ray irradiation of wild-type third-instar larvae induces cell cycle arrest within 1 hour. In contrast, X-ray irradiation of mus312Z3997/mus312D1 mutant larvae fails to induce cell cycle arrest.
Two pro-oocytes are visible in 75.0% of region 3 cysts in homozygous females (as assayed by c(3)G staining) compared to a frequency of 9.5% in wild type.
mus312D1/mus312D2 mutants have a similar frequency of single-strand annealing repair (SSA) compared to controls in a P{wIw.FRT} hemizygous assay to study DNA double-stranded break repair when assayed at 32oC or 38oC.
mus312D1 homozygotes much lower meiotic crossover frequency than wild-type flies. Survival of mus312D1/mus312Z1973 adults treated with DNA damaging agent Nitrogen mustard, is significantly reduced compared to wild-type. mus312Z1973/mus312D1 and mus312Z3997/mus312D1 animals have X chromosome non-disjunction rates of 24%.
Flies are sensitive to X rays.
Sensitive to 0.004% HN2 and 0.125% methyl methanesulfonate. Homozygous females show an increased frequency of nondisjunction.
Larval survival hypersensitive to exposure to X rays (Oliveri, Harris and Boyd, 1990), methyl methanesulfonate and nitrogen mustard. Reduces meiotic recombination (Green, 1981). homozygous fertile
BlmN1/BlmD2, mus312D1/mus312Z1973 has lethal | pupal stage phenotype, non-suppressible by spn-Aunspecified
mus312D1/mus312Z1973 is a suppressor of abnormal mitotic cell cycle phenotype of Fancm0693/Df(3R)ED6058
WRNexoΔ, mus312D1 has lethal - all die during pharate adult stage phenotype
Fancm0693/Df(3R)ED6058, mus312D1/mus312Z1973 has viable phenotype
Fancm0693/Df(3R)ED6058, mus312D1/mus312Z1973, mus81Nhe has viable phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973 has lethal - all die during pupal stage phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973, spn-A093A/spn-A3 has lethal - all die during pupal stage phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973 has lethal | pupal stage phenotype
BlmN2/BlmD2, mus312D1/mus312Z1973 has lethal | pupal stage phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973 has melanotic mass phenotype | third instar larval stage phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973, spn-A093A/spn-A3 has lethal | pupal stage phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973 has condensed chromosome phenotype, suppressible by spn-Aunspecified
BlmN1/BlmD2, mus312D1/mus312Z1973 has salivary gland imaginal ring phenotype, suppressible by spn-Aunspecified
BlmN1/BlmD2, mus312D1/mus312Z1973 has larval brain phenotype, non-suppressible by spn-Aunspecified
BlmN1/BlmD2, mus312D1/mus312Z1973 has imaginal disc | larval stage phenotype, non-suppressible by spn-Aunspecified
BlmN1/BlmD2, mus312D1/mus312Z1973 has larval brain phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973 has salivary gland imaginal ring phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973 has imaginal disc | larval stage phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973 has condensed chromosome phenotype
BlmN1/BlmD2, mus312D1/mus312Z1973 has imaginal disc | third instar larval stage phenotype
Spontaneous mitotic crossovers are completely absent in Fancm0693/Df(3R)ED6058 animals that are also mutant for mus312D1/mus312Z1973.
mus309N1/mus309D2 mus312D1/mus312Z1973 double mutant larvae have small brains, lack imaginal discs and have a reduced number of salivary gland imaginal ring cells. The nuclei of the remaining salivary gland imaginal ring cells appear larger than normal. Mitotic neuroblasts in these larvae show extreme genome instability; no mitotic nuclei with completely intact chromosomes are detected and approximately one-third show polyploidy.
The addition of spn-Aunspecified suppresses the the chromosome breakage and polyploidy phenotypes seen in mitotic neuroblasts of mus309N1/mus309D2 mus312D1/mus312Z1973 larvae, and also suppresses the defects in the salivary gland imaginal ring cells seen in the mus309N1/mus309D2 mus312D1/mus312Z1973 double mutants. However, addition of spn-Aunspecified does not suppress the pupal lethality, small brains and lack of imaginal discs seen in the mus309N1/mus309D2 mus312D1/mus312Z1973 double mutants.
mus309D2/mus309N2 mus312D1/mus312Z1973 double mutant larvae generally lack imaginal discs (although small, severely underdeveloped discs are sometimes seen in third instar larvae).
mus312D1/mus312Z1973, mus309D2/mus309N1 double mutants are inviable, dying after pupariation. Third-instar larvae have melanotic tumors and lack larval imaginal discs. Larval brains of double mutants are greatly reduced in size.
The spn-A3/spn-A093A transheterozygous condition does not suppress the lethality of mus312D1/mus312Z1973, mus309D2/mus309N1 double mutants.
Boyd.