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Molecular Mechanisms Of Dynamin-mediated Endocytosis In Nerve Terminals
Funder
National Health and Medical Research Council
Funding Amount
$1,033,626.00
Summary
Neurons communicate by neurotransmitter release from synaptic vesicles stored in nerve endings. There is a finite vesicle number, so they are recycled (endocytosis) by the protein dynamin. Our aim is to reveal how new vesicles are produced when the brain is under very high activity, to better understand diseases of the synapse like epilepsy. We propose that two forms of the dynamin gene mediate this process, only under conditions of high neuronal firing, such as occurs during a seizure.
Phosphorylation Of Synaptic Vesicle Glycoprotein 2 (SV2) Regulates Endocytosis Of Synaptotagmin For Synaptic Transmission
Funder
National Health and Medical Research Council
Funding Amount
$613,311.00
Summary
Antiepileptic drugs typically target ion transporters or neurotransmitter receptors. Synaptic vesicle glycoprotein 2 (SV2) is a rare example of a synaptic vesicle recycling protein that is the target of an antiepileptic drug. It also binds botulinum and tetanus neurotoxins. We discovered SV2 contains activity-dependent signalling molecules. Charactersation of these molecules and will allow a deeper understanding of the molecular basis for its role in epilepsy and toxin action.
Molecular mechanisms determining the lipid composition of synapses. Synapses between neurons play a key role in all functions of the nervous system including learning and memory. They are mostly composed of the unique combination of proteins and lipids, which function together to enable neurotransmission. While the molecular mechanisms determining the protein composition of synapses are well characterised, the mechanisms defining the lipid composition of synapses remain unknown. The project will ....Molecular mechanisms determining the lipid composition of synapses. Synapses between neurons play a key role in all functions of the nervous system including learning and memory. They are mostly composed of the unique combination of proteins and lipids, which function together to enable neurotransmission. While the molecular mechanisms determining the protein composition of synapses are well characterised, the mechanisms defining the lipid composition of synapses remain unknown. The project will use advanced techniques of neuroscience and lipid research to determine the mechanisms of lipid transport and retention at synapses. The project is expected to generate new knowledge about the fundamental mechanisms of brain function, which will be useful for developing new therapeutics enhancing the brain power.Read moreRead less
How do protein quality control mechanisms maintain neuronal ageing? This project aims to interrogate how mechanisms of protein quality control act in the brain - an organ that is particularly vulnerable to a high load of misfolded protein - to maintain normal physiology during ageing. This project expects to make advances in cellular biochemistry and neuroscience, using an innovative proximity labelling approach to identify quality control regulators in neurons that specifically engage with misf ....How do protein quality control mechanisms maintain neuronal ageing? This project aims to interrogate how mechanisms of protein quality control act in the brain - an organ that is particularly vulnerable to a high load of misfolded protein - to maintain normal physiology during ageing. This project expects to make advances in cellular biochemistry and neuroscience, using an innovative proximity labelling approach to identify quality control regulators in neurons that specifically engage with misfolded proteins during ageing, within the nervous system of a living animal. Expected outcomes of this project will generate new knowledge of brain physiology and ageing relevant to all animals. This should provide significant benefits, such as a greater understanding of long-term brain functions including memory.Read moreRead less