P{lacW} in the first exon of the trio transcript, in the untranslated region. P{lacW}trioS137203 and P{lacW}trioS138606 map within 5bp of each other.
Homozygous trioS137203 third instar larvae show a reduction in the number of boutons per muscle surface area (MSA). The number of boutons per MSA at muscle 4 is approximately 35% less than in controls.
trioS137203/Df(3L)Ar12-1 third instar larvae show a reduction in the number of boutons per muscle surface area (MSA). The number of boutons per MSA at muscle 4 is approximately 35% less than in controls.
trioS137203/trio6A third instar larvae show a reduction in the number of boutons per muscle surface area (MSA). The number of boutons per MSA at muscle 4 is approximately 35% less than in controls. The sizes of evoked excitatory junctional potentials (EJPs), miniature excitatory junctional potentials and the quantal content do not differ significantly from controls.
In heterozygous mutants, an occasional loss of the RP3 neuron is seen.
Adult escapers have a wing posture phenotype. Mutants show a short stop phenotype, with defects in the ability of nerve branches to reach target muscles. ISNb (where the effect is most pronounced) and SNa are most sensitive to the loss of trio activity. In addition, there are occasional defects in epidermal muscle attachment sites. The CNS also shows pathfinding errors resulting in breaks in the longitudinal connectives. The axons often fail to traverse the segment boundary.
trioS137203 is an enhancer of abnormal neuroanatomy | third instar larval stage phenotype of Madk00237
trioS137203 is a suppressor of abnormal size | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trioS137203 is a suppressor of abnormal neuroanatomy | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trio6A/trioS137203 is a suppressor of abnormal neurophysiology | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trio6A/trioS137203 is a suppressor of abnormal neurophysiology | third instar larval stage phenotype of Scer\GAL4BG380, saxA.UAS.cBa, tkvQ199D.UAS.Tag:HA
trioS137203/trio[+] is a suppressor | partially of abnormal size | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trioS137203/trio[+] is a suppressor | partially of abnormal neuroanatomy | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trio6A/trioS137203 is a non-suppressor of abnormal size | third instar larval stage phenotype of Rac1V12.UAS, Scer\GAL4BG380
trio6A/trioS137203 is a non-suppressor of abnormal neuroanatomy | third instar larval stage phenotype of Rac1V12.UAS, Scer\GAL4BG380
trioS137203 is an enhancer of larval VL3/4 motor neuron phenotype of PlexBUAS.cHa, Scer\GAL4elav.PLu
trioS137203 is an enhancer of larval intersegmental nerve phenotype of PlexBUAS.cHa, Scer\GAL4elav.PLu
trioS137203/trio[+] is an enhancer of phenotype of Lar5.5
trioS137203/trio[+] is an enhancer of larval intersegmental nerve phenotype of Lar5.5
trioS137203 is a non-enhancer of embryonic/larval neuromuscular junction | third instar larval stage phenotype of Madk00237
trioS137203 is a non-enhancer of NMJ bouton | third instar larval stage phenotype of Madk00237
trioS137203/trio[+] is a suppressor | partially of embryonic/larval neuromuscular junction | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trioS137203/trio[+] is a suppressor | partially of NMJ bouton | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trioS137203 is a suppressor of embryonic/larval neuromuscular junction | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trioS137203 is a suppressor of NMJ bouton | third instar larval stage phenotype of Rac1UAS.cLa, Scer\GAL4RapGAP1-OK6
trio6A/trioS137203 is a non-suppressor of embryonic/larval neuromuscular junction | third instar larval stage phenotype of Rac1V12.UAS, Scer\GAL4BG380
trio6A/trioS137203 is a non-suppressor of NMJ bouton | third instar larval stage phenotype of Rac1V12.UAS, Scer\GAL4BG380
One copy of trioS137203 partially suppresses the larval neuromuscular junction overgrowth and bouton number phenotypes seen when Rac1Scer\UAS.cLa is expressed in neurons under the control of Scer\GAL4OK6. Bouton number is reduced by more than 50%.
Homozygous trioS137203 suppresses the larval neuromuscular junction overgrowth and increase in bouton number seen when Rac1Scer\UAS.cLa is expressed in neurons under the control of Scer\GAL4OK6.
trioS137203/trio6A suppresses the increase in evoked excitatory junctional potential (EJPs) and quantal content seen when Rac1Scer\UAS.cLa is expressed in neurons under the control of Scer\GAL4OK6.
trioS137203 does not enhance the reduction in bouton number phenotype seen in Madk00237 larval neuromuscular junctions.
trioS137203/trio6A does not suppress the larval neuromuscular junction overgrowth and increase in bouton number seen when Rac1V12.Scer\UAS is expressed in motor neurons under the control of Scer\GAL4BG380.
trioS137203/trio6A suppresses the increase in evoked excitatory junctional potential (EJPs) and quantal content seen when saxA.Scer\UAS.cBa and tkvQ199D.Scer\UAS.T:Ivir\HA1 are expressed in motor neurons under the control of Scer\GAL4BG380.
trio6A/trioS137203 is rescued by trioUAS.cBa/Scer\GAL4RapGAP1-OK6
trio6A/trioS137203 is rescued by Scer\GAL4elav.Switch.PO/trioUAS.cBa
trioS137203/trioBX1B is partially rescued by Scer\GAL4elav-C155/trioUAS.cBa
trio6A/trioS137203 is not rescued by Scer\GAL4G14/trioUAS.cBa
Expression of trioScer\UAS.cBa in neurons under the control of Scer\GAL4OK6 rescues the reduction in synaptic bouton phenotype seen in trioS137203/trio6A third instar larvae. Expression of trioScer\UAS.cBa in muscles using Scer\GAL4G14 is unable to rescue the phenotype.
Expression of trioScer\UAS.cBa only in the larval stages using the neuronal driver Scer\GAL4elav.Switch.PO rescues the reduction in synaptic bouton phenotype seen in trioS137203/trio6A third instar larvae.
Excision of the P{lacW} restores viability and reverts the wing phenotype.