The N-terminus of hiw is deleted due to imprecise excision of P{GT1}hiwBG02015, removing the genomic region encoding the first 2784 amino acids of hiw.
wing vein L1 (with hiw052)
hiwΔN third instar larvae exhibit dramatic overgrowth of the neuromuscular junction, namely increased branching and increased number of presynaptic boutons, as compared to controls.
hiwΔN mutants show defective injury-induced axon degeneration as the severed axons persist rather than be cleared away. Moreover, after an axotomy of mechanosensory neurons in the Johnston's organ, the persisting severed axons can still elicit grooming behavior upon optogenetic stimulation of the neurons.
Mutant larvae show a dramatic increase in the number of boutons at the neuromuscular junction compared to wild type.
Mutant larvae show a decrease in axonal degeneration after crush injury compared to wild type.
Mutant larvae show an increase in both branch and bouton number at the neuromuscular junction compared to controls.
hiwΔN mutants display significantly enhanced aversive long term memory after one-session or two-session spaced training, but show normal long term memory after ten-session spaced training. Sensorimotor abilities are unchanged compared with controls.
hiwΔN mutants exhibit dramatic synaptic overgrowth yet reduced quantal content.
hiwΔN mutant neuromuscular junctions exhibit a decrease in bouton size compared to wild-type and a concurrent increase in the number of boutons (compared to wild-type).
Axonal sprouting of the injured axon after a crush injury to the segmental nerve in third instar larvae is accelerated approximately 5 hours in mutant animals compared to controls.
Morphological analysis at the neuromuscular junction of hiwΔNterm mutants reveals a dramatic synaptic overgrowth phenotype apparent at every type I synapse.
Using the MN4-Ib motoneuron as a model, hiwΔNterm mutants exhibit a fivefold increase in the numbers of both synaptic bouton and branch points when compared with wild-type neuromuscular junctions. The synaptic span is also incrase from approximately 15% in wild-type to approximately 40%. Although there is an increase in the number of synaptic boutons, there is an approximate 70% decrease in the average bouton size compared to wild-type.
hiwΔN has abnormal neuroanatomy phenotype, suppressible by Dscam118
hiwΔN has abnormal neuroanatomy phenotype, suppressible by Fmr1UAS.cZa/Scer\GAL4ppk.PG
hiwΔN has abnormal neuroanatomy | larval stage phenotype, suppressible by Aplip1ex
hiwΔN is a suppressor | partially of abnormal neuroanatomy | recessive | third instar larval stage | conditional phenotype of rawdcp-1
hiwΔN is a suppressor of abnormal neuroanatomy | larval stage phenotype of Aplip1ex
hiwΔN is a non-suppressor of abnormal neuroanatomy | somatic clone | adult stage phenotype of SarmΔARM.UAS.Tag:MYC, Scer\GAL4VGlut1-OK371
hiwΔN is a non-suppressor of abnormal neuroanatomy | somatic clone | adult stage phenotype of NmnatGD8082, Scer\GAL4VGlut1-OK371
hiwΔN has larval dorsal multidendritic neuron ddaC phenotype, suppressible by Dscam118
hiwΔN has larval dorsal multidendritic neuron ddaC phenotype, suppressible by Fmr1UAS.cZa/Scer\GAL4ppk.PG
hiwΔN has synapse phenotype, suppressible by Fmr1UAS.cZa/Scer\GAL4ppk.PG
hiwΔN has NMJ bouton | larval stage phenotype, suppressible by Aplip1ex
hiwΔN has neuromuscular junction | larval stage phenotype, suppressible by Aplip1ex
hiwΔN has embryonic/larval neuromuscular junction phenotype, non-suppressible by Scer\GAL4elav-C155/Rae1UAS.Tag:TAP
hiwΔN has synapse phenotype, non-suppressible by Scer\GAL4elav-C155/Rae1UAS.Tag:TAP
hiwΔN has NMJ bouton phenotype, non-suppressible by Scer\GAL4elav-C155/Rae1UAS.Tag:TAP
hiwΔN is a suppressor | partially of axon | third instar larval stage | conditional phenotype of rawdcp-1
hiwΔN is a suppressor | partially of embryonic/larval motor neuron | third instar larval stage | conditional phenotype of rawdcp-1
hiwΔN is a suppressor of NMJ bouton | larval stage phenotype of Aplip1ex
hiwΔN is a non-suppressor of sensory neuron | somatic clone | adult stage phenotype of SarmΔARM.UAS.Tag:MYC, Scer\GAL4VGlut1-OK371
hiwΔN is a non-suppressor of axon | somatic clone | adult stage phenotype of SarmΔARM.UAS.Tag:MYC, Scer\GAL4VGlut1-OK371
hiwΔN is a non-suppressor of sensory neuron | somatic clone | adult stage phenotype of NmnatGD8082, Scer\GAL4VGlut1-OK371
hiwΔN is a non-suppressor of axon | somatic clone | adult stage phenotype of NmnatGD8082, Scer\GAL4VGlut1-OK371
hiwΔN is a non-suppressor of neuronal cell body | somatic clone | adult stage phenotype of NmnatGD8082, Scer\GAL4VGlut1-OK371
MARCM clones in sensory neurons in the adult wing expressing Ect4ΔARM.Scer\UAS.T:Hsap\MYC driven by Scer\GAL4VGlut-OK371 undergo spontaneous cell body and axon degeneration which cannot be suppressed by combination hiwΔN.
The axon and cell body degeneration in sensory neuron clones in the adult wing expressing NmnatGD8082 under the control of Scer\GAL4VGlut-OK371 is only marginally improved by hiwΔN.
The dramatic overgrowth of presynaptic arbors found in hiwΔNterm mutant C4 da neurons is completely abolished in a Dscam118 MARCM clone background.
The dramatic overgrowth of presynaptic arbors found in hiwΔNterm mutant C4 da neurons is completely abolished by expression of Fmr1Scer\UAS.cZa under the control of Scer\GAL4ppk.PG.
Presynaptic expression of Rae1Scer\UAS.T:Zzzz\TAP under the control of Scer\GAL4elav-C155 fails to rescue the bouton number increase found in hiwΔN mutant synapses.