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Mechanism of glutamate transport from experimental and simulation studies. Glutamate transporters play key roles in shaping the electrical signaling in the brain. Under conditions of stress or after a stroke, glutamate transporter function is impaired, which can lead to excessive levels of glutamate, cell death and impaired brain function. The project will help to decipher the operation of glutamate transporters at a molecular level and provide greater understanding of how glutamate levels are c ....Mechanism of glutamate transport from experimental and simulation studies. Glutamate transporters play key roles in shaping the electrical signaling in the brain. Under conditions of stress or after a stroke, glutamate transporter function is impaired, which can lead to excessive levels of glutamate, cell death and impaired brain function. The project will help to decipher the operation of glutamate transporters at a molecular level and provide greater understanding of how glutamate levels are controlled, which is vital for developing better treatments for neurological disorders such as stroke. The project will also provide research training in experimental/computational molecular biology, which is a rapidly growing field underpinning the biotechnological and pharmaceutical industries. Read moreRead less
Hierarchical modeling of protein interactions. Protein interactions play a central role in function and structural organization of cells. Their elucidation is essential for a better understanding of many cellular processes from signal transduction to enzyme inhibition. The aim of this project is to utilize the unprecedented powers of current supercomputers in developing a hierarchical model of protein interactions. The method combines Brownian dynamics at large distances and long time scales ....Hierarchical modeling of protein interactions. Protein interactions play a central role in function and structural organization of cells. Their elucidation is essential for a better understanding of many cellular processes from signal transduction to enzyme inhibition. The aim of this project is to utilize the unprecedented powers of current supercomputers in developing a hierarchical model of protein interactions. The method combines Brownian dynamics at large distances and long time scales with molecular dynamics at small distances and shorter times. Applications to both membrane proteins (blocking of ion channels by toxins and drugs) and globular proteins (ligand binding to receptors and protein association) will be considered.Read moreRead less
Defining mechanisms of action of novel alpha-conotoxins at nicotinic receptor-channels. Marine snails from the waters off the Australian coast produce an amazing variety of mini-proteins in their venoms called conotoxins that they use to capture prey. These conotoxins bind very specifically to receptors in our body associated with the transmission of nerve signals. We will use natural and synthetically modified conotoxins to selectively block particular types of neuronal 'receptors' to gain a gr ....Defining mechanisms of action of novel alpha-conotoxins at nicotinic receptor-channels. Marine snails from the waters off the Australian coast produce an amazing variety of mini-proteins in their venoms called conotoxins that they use to capture prey. These conotoxins bind very specifically to receptors in our body associated with the transmission of nerve signals. We will use natural and synthetically modified conotoxins to selectively block particular types of neuronal 'receptors' to gain a greater understanding of how the nervous system functions. This knowledge will help in the design of new drugs to treat a variety of diseases and disorders. Essentially we will use a chemical armoury developed by the cone snail to design state-of-the-art mini-protein drugs.Read moreRead less
Biological probes for understanding mammalian cellular transport mechanisms. Cellular components are moved around within cells by molecular motors. This fundamental transport mechanism depends on a network of tracks. Blocks in this cellular transport can result in a number of mammalian diseases, particularly within nerve cells. This project will increase our understanding of the mechanisms of cellular transport and, in particular, how molecular motors engage their cargo. This is essential ground ....Biological probes for understanding mammalian cellular transport mechanisms. Cellular components are moved around within cells by molecular motors. This fundamental transport mechanism depends on a network of tracks. Blocks in this cellular transport can result in a number of mammalian diseases, particularly within nerve cells. This project will increase our understanding of the mechanisms of cellular transport and, in particular, how molecular motors engage their cargo. This is essential groundwork for the development of drugs that target this transport mechanism.Read moreRead less
Cracking the LIM-code: Transcription factor networks in developmental biology. Our current inability to stimulate the regeneration of nervous tissue is frustrated by a lack of detailed knowledge of the complex processes that take place at the molecular and cellular levels during development. We are determining how a group of cellular proteins that have key roles in neural development interact with each other and with DNA. With this information we are developing reagents that can be used to probe ....Cracking the LIM-code: Transcription factor networks in developmental biology. Our current inability to stimulate the regeneration of nervous tissue is frustrated by a lack of detailed knowledge of the complex processes that take place at the molecular and cellular levels during development. We are determining how a group of cellular proteins that have key roles in neural development interact with each other and with DNA. With this information we are developing reagents that can be used to probe the fundamental process of cell differentiation in the central nervous system.Read moreRead less
Nuclear Trafficking of Apolipoprotein-E. Apolipoprotein-E (apoE) regulates specific age-related neurodegenerative and cardiovascular diseases. The role of apoE in these disorders is unclear. This project will benefit our community by providing the basic cell biology knowledge required to understand disease mechanisms and ultimately provide avenues for better treatments. Aspects of the project will focus on the modification of apoE by carbohydrates and the interaction of apoE with cellular carboh ....Nuclear Trafficking of Apolipoprotein-E. Apolipoprotein-E (apoE) regulates specific age-related neurodegenerative and cardiovascular diseases. The role of apoE in these disorders is unclear. This project will benefit our community by providing the basic cell biology knowledge required to understand disease mechanisms and ultimately provide avenues for better treatments. Aspects of the project will focus on the modification of apoE by carbohydrates and the interaction of apoE with cellular carbohydrate-containing structures. The importance of carbohydrates in the regulation of cellular and protein function is increasingly recognised and forms a foundation for the rapidly expanding discipline of glycobiology. This project will strengthen Australia's glycobiology research capacity.Read moreRead less
Regulation of Stress Hormone Receptors in the Brain. Our research will provide information on how the brain controls our response to stress and will allow the development of targeted strategies to reduce the possibility during chronic stress of the development of conditions such as anxiety and depression. This will improve mental health outcomes in Australia and add to Australia's economic and social stability.
Realistic models of permeation in ion channels. Ion channels are formed by proteins in cell membranes and provide pathways for fast and controlled flow of selected ions. This activity generates action potentials in nerves and muscles that forms the basis of all movement, sensation and thought processes. Recent determination of the crystal structure of channel proteins has enabled construction of models that can relate channel function to its structure--necessary for understanding their operati ....Realistic models of permeation in ion channels. Ion channels are formed by proteins in cell membranes and provide pathways for fast and controlled flow of selected ions. This activity generates action potentials in nerves and muscles that forms the basis of all movement, sensation and thought processes. Recent determination of the crystal structure of channel proteins has enabled construction of models that can relate channel function to its structure--necessary for understanding their operation and seeking cures for diseases caused by their malfunction. This project aims to develop accurate ion-protein-water interactions for permeation models based on stochastic and molecular dynamics simulations using both classical and quantum mechanical methods.Read moreRead less
Quantum mechanical and dynamical investigation of ion channels. Many genetic diseases result from mutations in the genes that transcribe the channel proteins. Ion channels are also primary targets for development of therapeutic drugs for many ailments. Development of proper simulation tools is essential for a molecular-level understanding of their operation, which will be very helpful in finding treatments for genetic diseases as well as new drugs that target ion channels. Another aim of the p ....Quantum mechanical and dynamical investigation of ion channels. Many genetic diseases result from mutations in the genes that transcribe the channel proteins. Ion channels are also primary targets for development of therapeutic drugs for many ailments. Development of proper simulation tools is essential for a molecular-level understanding of their operation, which will be very helpful in finding treatments for genetic diseases as well as new drugs that target ion channels. Another aim of the project is to provide research training in computational biology. Research in this area is rapidly growing elsewhere but it has been rather neglected in Australia, and there is a shortage of researchers with such skills at present.Read moreRead less
Hierarchical Phosphorylation of Tyrosine Hydroxylase is Dependent on the Activation Sequence of Signaling Pathways. Protein phosphorylation is a fundamental process in biology. It controls protein expression and function in all cells. Hierarchical phosphorylation is defined as the phosphorylation of a protein at one site leading to an altered phosphorylation at another site on the same protein and an altered biological outcome. We have discovered that the enzyme tyrosine hydroxylase undergoes a ....Hierarchical Phosphorylation of Tyrosine Hydroxylase is Dependent on the Activation Sequence of Signaling Pathways. Protein phosphorylation is a fundamental process in biology. It controls protein expression and function in all cells. Hierarchical phosphorylation is defined as the phosphorylation of a protein at one site leading to an altered phosphorylation at another site on the same protein and an altered biological outcome. We have discovered that the enzyme tyrosine hydroxylase undergoes a form of hierarchical phosphorylation not previously reported. Here we examine hierarchical phosphorylation in rat and human tyrosine hydroxylase and its functional consequence in intact cells. The approaches and methods developed will also be applicable to investigation of hierarchical phosphorylation in other proteins.Read moreRead less