Insertion of four nucleotides near the start codon that shifts the translational reading frame. This is predicted to produce a truncated protein of 66 amino acids that includes the amino terminal 40 amino acids of Klp61F.
nuclear lamina & neuroblast & larva
spermatid (with Klp61F07012)
spindle & spermatocyte (with Klp61F07012)
The nuclear lamina in monopolar Klp61Furc-1 cells show involutions that extend towards centrally located centrosomes. Testes are not generated in Klp61Furc-1 homozygous mutants. A number of transheterozygous Klp61F07012/Klp61Furc-1 spermatocytes exhibit several small nuclei at the poles of telophase spindles and some post-meiotic spermatids also contain micronuclei. Fusiform structures, indicative of a bipolar spindle in wild-type spermatocytes are not detected in Klp61F07012/Klp61Furc-1 transheterozygote spermatocytes.
The brains of homozygous and hemizygous larvae have no anaphase figures, and an increased frequency of polyploid figures and overcondensed chromosomes compared to wild-type. 87.8% of the mitotic spindles in homozygous larval brain cells are monopolar, with the remainder being bipolar but monastral (only one half-spindle appears to be organised by a centrosome with a focus of γ tubulin). No normal biastral bipolar spindles are seen. The brains are very small compared to wild-type and there are no recognisable imaginal discs.
Primary defect is an inability of centrosomes to separate and organise a bipolar spindle. Mitotic figures are highly polyploid consisting of overcondensed chromosomes in apparent monopolar configurations.
Klp61Furc-1 has lethal | larval stage phenotype, suppressible by ncd1
Klp61Furc-1 is an enhancer of visible | adult stage phenotype of Hsap\MAPTUAS.0N4R.Tag:FLAG, Scer\GAL4ptc.PU
Klp61Furc-1 is an enhancer of visible | adult stage phenotype of Hsap\MAPTUAS.0N4R.Tag:FLAG, Scer\GAL4GMR.PU
Klp61Furc-1 is an enhancer of visible | adult stage phenotype of Scer\GAL4ptc.PU, tauUAS.cMa
Klp61Furc-1, ncd1 has increased occurrence of cell division phenotype
Klp61Furc-1/Df(3L)bab-PG, ncd1 has lethal phenotype
Klp61Furc-1/Klp61F06345, ncd1/ncd9 has partially lethal phenotype
Klp61Furc-1 has aster & neuroblast & larva phenotype, suppressible by ncd1
Klp61Furc-1 has spindle & neuroblast & larva phenotype, suppressible by ncd1
Klp61Furc-1 is an enhancer of wing blade phenotype of Hsap\MAPTUAS.0N4R.Tag:FLAG, Scer\GAL4ptc.PU
Klp61Furc-1 is an enhancer of eye phenotype of Hsap\MAPTUAS.0N4R.Tag:FLAG, Scer\GAL4GMR.PU
Klp61Furc-1 is an enhancer of interommatidial bristle phenotype of Hsap\MAPTUAS.0N4R.Tag:FLAG, Scer\GAL4GMR.PU
Klp61Furc-1 is an enhancer of wing blade phenotype of Scer\GAL4ptc.PU, tauUAS.cMa
Hsap\MAPTUAS.0N4R.Tag:FLAG, Klp61Furc-1, Scer\GAL4GMR.PU has ommatidium | adult stage phenotype
Klp61Furc-1, ncd1 has nuclear lamina & neuroblast & larva phenotype
Klp61Furc-1/Klp61F07012, ncd1 has nuclear lamina & neuroblast & larva phenotype
The reduced size of the L3-L4 intervein region (measured at the wing margin) observed in flies expressing tauScer\UAS.cMa under the control of Scer\GAL4ptc.PU is decreased further by combination with Klp61Furc-1 in heterozygous state.
Klp61F06345 ncd9/Klp61Furc-1 ncd1 adults are recovered at 28% of the frequency expected for full viability. Klp61Furc-1 ncd1 double mutants survive longer as third instar larvae and show increased cell proliferation in comparison to Klp61Furc-1 mutants. Klp61Furc-1 ncd1 cells have a monopolar organisation of chromosomes and centrosomes, showing involutions that extend towards centrally located centrosomes. Klp61F07012 ncd1/Klp61Furc-1 ncd1 cells have a monopolar organisation of chromosomes and centrosomes, showing nuclear lamina involutions that extend towards centrally located centrosomes. Biastral spindles are not found in Klp61Furc-1 mutants, but comprise more than 66% of spindles in Klp61Furc-1 ncd1 mutants.
The reduced size of the L3-L4 intervein region (measured at the wing margin) characteristic for adult flies expressing Hsap\MAPTScer\UAS.0N4R.T:Zzzz\FLAG under the control of Scer\GAL4ptc.PU is decreased further by combination with Klp61Furc-1 in heterozygous state.
The rough eye phenotype (missing interommatidial bristles) observed in adult flies expressing single copy of Hsap\MAPTScer\UAS.0N4R.T:Zzzz\FLAG under the control of Scer\GAL4GMR.PU is exacerbated further (more missing bristles, ommatidial fusion) by combination with Klp61Furc-1 in heterozygous state. The resulting phenotype is similar or even stronger than that seen in flies expressing two copies of Hsap\MAPTScer\UAS.0N4R.T:Zzzz\FLAG.
Klp61F alleles form the following phenotypic series, from the most to the least severe: Klp61Furc-1 > Klp61Furc-3 > Klp61F06836, Klp61F07012 > Klp61F06345 > Klp61Furc-4.