RRC ID |
54365
|
Author |
Phan A, Thomas CI, Chakraborty M, Berry JA, Kamasawa N, Davis RL.
|
Title |
Stromalin Constrains Memory Acquisition by Developmentally Limiting Synaptic Vesicle Pool Size.
|
Journal |
Neuron
|
Abstract |
Stromalin, a cohesin complex protein, was recently identified as a novel memory suppressor gene, but its mechanism remained unknown. Here, we show that Stromalin functions as a negative regulator of synaptic vesicle (SV) pool size in Drosophila neurons. Stromalin knockdown in dopamine neurons during a critical developmental period enhances learning and increases SV pool size without altering the number of dopamine neurons, their axons, or synapses. The developmental effect of Stromalin knockdown persists into adulthood, leading to strengthened synaptic connections and enhanced olfactory memory acquisition in adult flies. Correcting the SV content in dopamine neuron axon terminals by impairing anterograde SV trafficking motor protein Unc104/KIF1A rescues the enhanced-learning phenotype in Stromalin knockdown flies. Our results identify a new mechanism for memory suppression and reveal that the size of the SV pool is controlled genetically and independent from other aspects of neuron structure and function through Stromalin.
|
Volume |
101(1)
|
Pages |
103-118.e5
|
Published |
2019-1-2
|
DOI |
10.1016/j.neuron.2018.11.003
|
PII |
S0896-6273(18)30994-2
|
PMID |
30503644
|
PMC |
PMC6318033
|
MeSH |
Amino Acid Sequence
Animals
Animals, Genetically Modified
Dopaminergic Neurons / metabolism
Dopaminergic Neurons / ultrastructure
Drosophila Proteins / deficiency*
Drosophila Proteins / genetics
Drosophila melanogaster
Female
Memory / physiology*
Nuclear Proteins / deficiency*
Nuclear Proteins / genetics
Synapses / genetics
Synapses / metabolism
Synapses / ultrastructure
Synaptic Vesicles / genetics
Synaptic Vesicles / metabolism*
Synaptic Vesicles / ultrastructure*
|
IF |
14.415
|
Times Cited |
2
|
Resource |
Drosophila |
3423R-2
GFP-IR-1
DGRC#104219
DGRC#114140
DGRC#105377 |