Deletion of sequence encoding 252 amino acid residues of Kat60, including the entire AAA domain in the C-terminus.
lethal (with Df(3R)ED5138)
80% of homozygotes die at larval stages and 20% live to the early pupal stage. The surviving mutant larvae appear sluggish.
Homozygous and Kat6017A/Df(3R)ED5138 third instar larvae show defects at the neuromuscular junction (NMJ) compared to wild type: the total number of boutons and the number of satellite boutons are both significantly increased. In addition, a large number of enlarged vesicles up to 200nm in diameter are seen throughout the boutons in the NMJs of homozygous larvae.
The amplitude of the evoked excitatory junctional potential (EJP) at the NMJ is significantly decreased in homozygous larvae compared to wild type, while the amplitude and frequency of the spontaneous miniature EJP is unchanged. Quantal content is reduced.
Homozygous class IV dendritic arborization neurons show altered dendritic elaboration compared to wild type: the total dendritic length and the number of dendritic termini are significantly increased, while the total dendrite field area is normal.
Homozygous larval muscle cells have an unevenly distributed microtubule network and a significantly increased perinuclear microtubule density compared to wild-type cells.
Kat6017A is rescued by Kat60UAS.cMa
Kat6017A is rescued by Kat60UAS.cMa/Scer\GAL4da.PU
Kat6017A is rescued by Kat60UAS.cMa/Scer\GAL4elav.PU
The M{UAS-Kat60.M}ZH-51D insertion line effectively rescues the lethality of Kat6017A animals, even in the absence of a Scer\GAL4 driver. The anatomical and electrophysiological defects at the neuromuscular junction which are seen in Kat6017A third instar larvae are rescued by two copies of Kat60Scer\UAS.cMa.