A mutation in the conserved splice donor dinucleotide after Q25 (C/gt->C/at).
G13829027A
GT?AT
W108term | Arpc1-PA; W108term | Arpc1-PB
A mutation in the conserved splice donor dinucleotide after Q25 (C/gt->C/at).
lethal (with Df(2L)b84a9)
actin filament & nurse cell | germ-line clone
macrochaeta & adult head | somatic clone
microchaeta & adult head | somatic clone
nucleus & nurse cell | germ-line clone
Arpc1Q25sd heterozygous mutant third instar larvae display increased number of boutons on neuromuscular junctions. The number of dendritic branches as well as the total dendrite length in class IV dendritic arborizing neurons in heterozygous larvae is comparable to controls but severely reduced in MARCM somatic clones homozygous for Arpc1Q25sd.
Homozygous SCARΔ37 mutant eye clones lack interommatidial bristles. They also show an irregular ommatidia array and crater-like intrusions. Rhabdomeres appear short and bulky and photoreceptors have fallen through the fenestrated membrane, retinal depth is reduced and defects are seen in cytoskeletal architecture.
Ring canals between nurse cells mutant for Sop2Q25sd first begin to look different from wild-type ring canals at stage 5-6 of oogenesis: actin incorporation in mutant ring canals is less robust, and ring canals are smaller in diameter. These defects are more clear by stage 8, when some ring canals also become misshapen. By stage 10, mutant ring canals are severely deformed. In later stages, ring canals are sometimes detached from the nurse cell membranes, nurse cell subcortical actin becomes destabilized, and some nurse cells become multinucleate. This latter phenotype is not due to an inhibition of cell division, as nurse cell numbers remain normal.
When homozygous mutant clones are made in the head, a pronounced loss of external sensory organ structures is seen, including both the bristle-shafts and the socket structures from which they emanate.
CNS axon morphology in Sop2Q25sd homozygous embryos is normal. Extensive bristle loss and a rough-eye phenotype are apparent in heads carrying somatic clones of Sop2Q25sd. The abnormal eye facet pattern of these mosaic eyes is characterized by irregularly shaped ommatidia, craters of missing lens material, and a bristle-loss phenotype.
Arpc1Q25sd has abnormal neuroanatomy | third instar larval stage phenotype, suppressible by Blos1[+]/Blos1ex65
Arpc1Q25sd has abnormal neuroanatomy | third instar larval stage phenotype, suppressible by Pldn[+]/PldnΔ1
Arpc1Q25sd has abnormal neuroanatomy | third instar larval stage phenotype, suppressible by Dysb[+]/Dysbe01028
Arpc1Q25sd/Arpc1[+] is an enhancer of abnormal neuroanatomy | third instar larval stage phenotype of Blos1ex65
Arpc1Q25sd/Arpc1[+] is a non-enhancer of abnormal neuroanatomy | third instar larval stage phenotype of Dysbe01028
Arpc1Q25sd/Arpc1[+] is a suppressor of abnormal neuroanatomy | third instar larval stage phenotype of Dysbe01028
Arpc1Q25sd/Arpc1[+] is a suppressor of abnormal neuroanatomy | third instar larval stage phenotype of Blos1ex65
Arpc1Q25sd/Arpc1[+] is a suppressor of abnormal cell migration phenotype of CskGD9345, Scer\GAL4ptc-559.1
Arpc1Q25sd/Arpc1[+] is a non-suppressor of abnormal neuroanatomy | third instar larval stage phenotype of Dysbe01028
Arpc1Q25sd/Sop2[+] is a non-suppressor of abnormal neuroanatomy phenotype of LIMK1UAS.Tag:HA, Scer\GAL4ey-OK107
Arpc1Q25sd, CskGD9345 has lethal phenotype
Arpc1Q25sd has NMJ bouton | increased number | third instar larval stage phenotype, suppressible by Blos1[+]/Blos1ex65
Arpc1Q25sd has NMJ bouton | increased number | third instar larval stage phenotype, suppressible by Pldn[+]/PldnΔ1
Arpc1Q25sd has NMJ bouton | increased number | third instar larval stage phenotype, suppressible by Dysb[+]/Dysbe01028
Arpc1Q25sd/Arpc1[+] is an enhancer of larval multidendritic class IV neuron | third instar larval stage phenotype of Blos1ex65
Arpc1Q25sd/Arpc1[+] is an enhancer of dendrite | third instar larval stage phenotype of Blos1ex65
Arpc1Q25sd/Arpc1[+] is a non-enhancer of larval multidendritic class IV neuron | third instar larval stage phenotype of Dysbe01028
Arpc1Q25sd/Arpc1[+] is a non-enhancer of dendrite | third instar larval stage phenotype of Dysbe01028
Arpc1Q25sd/Arpc1[+] is a suppressor of NMJ bouton | increased number | third instar larval stage phenotype of Dysbe01028
Arpc1Q25sd/Arpc1[+] is a suppressor of NMJ bouton | increased number | third instar larval stage phenotype of Blos1ex65
Arpc1Q25sd/Arpc1[+] is a suppressor of wing disc phenotype of CskGD9345, Scer\GAL4ptc-559.1
Arpc1Q25sd/Arpc1[+] is a non-suppressor of larval multidendritic class IV neuron | third instar larval stage phenotype of Dysbe01028
Arpc1Q25sd/Arpc1[+] is a non-suppressor of dendrite | third instar larval stage phenotype of Dysbe01028
Arpc1Q25sd/Sop2[+] is a non-suppressor of adult mushroom body phenotype of LIMK1UAS.Tag:HA, Scer\GAL4ey-OK107
Arpc1Q25sd, DAAM[+]/DAAMEx68 has embryonic/larval central nervous system phenotype
Arpc1Q25sd/Sop2[+], DAAMEx68 has embryonic/larval central nervous system phenotype
Arp3EP3640, Arpc1Q25sd/Df(2L)b84a9 has larval ventral nerve cord commissure phenotype
Arp3EP3640/Arp66B[+], Arpc1Q25sd/Df(2L)b84a9 has larval ventral nerve cord commissure phenotype
The increased number of boutons on neuromuscular junctions observed in third instar larvae mutant for any of the following alleles: Arpc1Q25sd (in heterozygous state), Pldndel (homozygous), Dysbe01028 (either homozygous or heterozygous) or Blos1ex65 (heterozygous) is restored to wild-type levels in Arpc1Q25sd/+;Pldndel/+, Arpc1Q25sd/+;Dysbe01028/+ or Arpc1Q25sd/+;Blos1ex65/+ double heterozygotes.
The reduced number of dendritic branches as well as the total dendrite length in class IV dendritic arborizing neurons characteristic for Dysbe01028 heterozugous larvae is not modified by combination with a single copy of Arpc1Q25sd. The reduced number of branches observed in Blos1ex65 heterozygotes is mildly enhanced in Blos1ex65;Arpc1Q25sd double heterozygotes but the total dendrite length per neuron remains unchanged.
An Arpc1Q25sd heterozygous mutant background enhances the actin remodelling and subsequent basolateral invasion of epithelial cells seen in flies expressing CskGD9345 in a stripe of cells at the anterior/posterior boundary of the larval wing disc under the control of Scer\GAL4ptc-559.1.
In Sop2Q25sd/Df(2L)b84a9; Arp66BEP3640/+ embryos, commissural axons are severely reduced.
Arpc1Q25sd is rescued by Arpc1+tPa