Deletion from site of P{EP}subEP616 (located 105bp upstream of the sub ATG) removing P{EP}subEP616 and more than half of the sub transcription unit.
brain | larval stage (with sub1)
meiotic spindle | oogenesis (with sub2)
spindle & oocyte
spindle & oocyte (with sub1)
spindle midzone & oocyte
wing margin (with subDub)
The percentage of cells in mitosis in sub1/sub131 mutant larval brains is approximately double that of wild-type.
sub1/sub131 larval brains show an increased frequency of spindle assembly defects. These include frayed microtubules, unequal distribution of microtubules in the two half spindles, and disorganised or absent interpolar microtubules. 70% of mutant brains show disorganised metaphase, and 46% show lagging chromosomes at anaphase compared to 11% and 9% respectively in wild-type brains.
sub131 mutant larval brains show a higher percentage of cells in mitosis (2.66) compared to wild-type brains (1.32).
43% of sub131 mutant brains show disorganised metaphase spindles (including frayed microtubules, unequal distribution of microtubules in the two half spindles, and disorganised or absent interpolar microtubules) compared to 11% of metaphase spindles in wild-type brains. 52% show lagging chromosomes at anaphase compared to 9% in wild-type brains.
14/17 sub1/sub131 oocytes have abnormal spindle organisation. Among the abnormal spindles, 3 are monopolar, 9 are tripolar and 2 have other defects such as fraying of microtubules.
Most mutant oocyte spindles are not bipolar. All mutant spindles, even those that are bipolar, lack the prominent bundles of central spindle microtubules that are seen in wild-type oocytes.
Sterile females show rough eyes and clipped wings. Mutant males show elevated levels of X-Y chromosome non-disjunction in male meiosis. Embryos derived from mutant mothers show early mitotic abnormalities including arrest before embryonic mitoses begin, a polar body near one end and the development of one or two spindles in the middle. Structure of spindles in the embryos is abnormal, and their size variable.
sub131/sub1 has abnormal mitotic cell cycle phenotype, enhanceable by polo16-1/polo[+]
sub131/sub1 has abnormal mitotic cell cycle phenotype, enhanceable by IncenpEC3747/Incenp[+]
sub131 has abnormal mitotic cell cycle phenotype, suppressible by BubR1k03113
sub131/sub1 has abnormal mitotic cell cycle phenotype, suppressible by ncd1/ncd1
polo16-1, sub131/sub1 has decreased body size | adult stage phenotype
ncd1, sub131/sub1 has lethal | third instar larval stage phenotype
BubR1k03113, sub131 has decreased occurrence of cell division | larval stage phenotype
polo16-1/polo[+], sub131/sub1 has lethal | larval stage phenotype
ncd[+]/ncd1, sub131/sub1 has viable | third instar larval stage phenotype
IncenpEC3747/Incenp[+], sub131/sub1 has lethal | larval stage phenotype
Df(2L)Exel7049/+, sub131/sub1 has lethal | larval stage phenotype
aurA87Ac-3/aur[+], sub131/sub1 has viable | larval stage phenotype
BubR1k03113, sub131 has abnormal size | larval stage phenotype
BubR1k03113, sub131 has decreased cell number | larval stage phenotype
sub131/sub1 has brain | larval stage phenotype, enhanceable by polo16-1/polo[+]
sub131 has brain | larval stage phenotype, suppressible by BubR1k03113
BubR1k03113, sub131 has brain | larval stage phenotype
sub131, BubR1k03113 double mutant larval brains show a lower percentage of cells in mitosis (0.65) compared to sub131 mutant brains (2.66) or wild-type brains (1.32).
sub131, BubR1k03113 double mutant larval brains are slow growing, small, and contain fewer cells than BubR1k03113 mutants.
sub1/sub131; ncd1/ncd1 mutant larval brains show a comparable percentage of cells in mitosis compared to wild-type.
sub1/sub131; polo16-1/+ rare survivors are sickly and small with abdominal patterning defects. Late larval developmental arrest is observed. Severe defects in spindle organization are observed, and spindles are unusually short. Larvae show a higher percentage of cells in mitosis compared to sub1/sub131 or polo16-1/+, and nearly four times that of wild-type.
sub1/sub131, IncenpEC3747/+ mutant larval brains display defects in spindle assembly, and short and disorganised metaphase spindles are common. Anaphase spindles usually lack an organised midzone, and 76% show lagging chromosomes at anaphase (compared to 55% in sub1/sub131 mutant brains). Double mutant larvae exhibit a high frequency of polyploid cells.
sub131/sub1 is rescued by subUASp.EGFP/Scer\GAL4VP16.nanos.UTR
sub131/sub1 is rescued by Scer\GAL4VP16.nanos.UTR/subUASp.Tag:HA
Allelic series (strongest to weakest phenotype): sub131/subDub = sub202/subDub = sub218/subDub = sub22/subDub = sub72/subDub = sub104/subDub = sub158/subDub > sub1794/subDub > +/subDub.