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Regulation of proteolysis by specialised adaptor proteins. Training research scientists of the future forms an integral part of this research program and this collaboration will provide an excellent opportunity for young Australian scientists to be exposed to the very professional and competitive environment of basic research, as it exists in Germany. It will expose early career researchers to new ideas and emerging methodologies arming them with valuable skills, which they will transfer to Aust ....Regulation of proteolysis by specialised adaptor proteins. Training research scientists of the future forms an integral part of this research program and this collaboration will provide an excellent opportunity for young Australian scientists to be exposed to the very professional and competitive environment of basic research, as it exists in Germany. It will expose early career researchers to new ideas and emerging methodologies arming them with valuable skills, which they will transfer to Australia. The involvement of Prof. Turgay in the Deutsche Forschungsgemeinschaft (DFG) Priority Programme: Proteolysis in Prokaryotes also provides a unique opportunity for these young researchers to interact with several of the worlds leading scientists in the area of proteolysis, enhancing Australia's reputation at the forefront of science.Read moreRead less
Ubiquinone in Giardia: Amitochondrial component in an amitochondriate parasite. Giardia intestinalis is a fascinating organism, it is one of the most primitive nucleated organisms known and is responsible for ~280 million infections annually. Ubiquinone is usually associated with mitochondrial function, however it has been found in Giardia, which lacks this organelle. Our initial studies show that in Giardia, ubiquinone plays essential roles in electron transport pathways associated with membr ....Ubiquinone in Giardia: Amitochondrial component in an amitochondriate parasite. Giardia intestinalis is a fascinating organism, it is one of the most primitive nucleated organisms known and is responsible for ~280 million infections annually. Ubiquinone is usually associated with mitochondrial function, however it has been found in Giardia, which lacks this organelle. Our initial studies show that in Giardia, ubiquinone plays essential roles in electron transport pathways associated with membrane energisation and oxidative stress management. Elucidation of these mechanisms will have a major impact on the understanding of Giardia and other anaerobic organisms as well as being of significant evolutionary and medical importance.
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Molecular basis of the antifungal and antimalarial activity of a plant defensin. The plant defensin NaD1 has potent inhibitory activity against a number of agronomically important fungal pathogens. These species are major pathogens of cotton and other important agricultural crops such as canola and potatoes. These pathogens cause serious economic losses and threaten the future of the cotton industry in Australia. NaD1 also has potential as a new antibiotic for treatment of infections in human ....Molecular basis of the antifungal and antimalarial activity of a plant defensin. The plant defensin NaD1 has potent inhibitory activity against a number of agronomically important fungal pathogens. These species are major pathogens of cotton and other important agricultural crops such as canola and potatoes. These pathogens cause serious economic losses and threaten the future of the cotton industry in Australia. NaD1 also has potential as a new antibiotic for treatment of infections in humans.Read moreRead less
In situ measurements of the electrostatic properties inside photosynthetic reaction centres: correlation with the energy conversion function of the protein. The photochemical reaction centre is a key protein complex involved in energy conversion. It converts solar energy into chemical energy as a transmembrane charge separation. Coupling of electron and proton transfer is catalysed at the level of a ubiquinone cofactor. In order to understand how the redox properties of this cofactor are fine tu ....In situ measurements of the electrostatic properties inside photosynthetic reaction centres: correlation with the energy conversion function of the protein. The photochemical reaction centre is a key protein complex involved in energy conversion. It converts solar energy into chemical energy as a transmembrane charge separation. Coupling of electron and proton transfer is catalysed at the level of a ubiquinone cofactor. In order to understand how the redox properties of this cofactor are fine tuned by the protein environment, we plan to probe the ubiquinone site using a voltage-sensitive fluorescent dye. This exciting multidisciplinary project will contribute to the understanding of how protein matrices influence and govern the midpoint redox potential of their cofactors and the environments of theirRead moreRead less
A unified approach to studies on mitochondrial biogenesis. Mitochondria supply the cell with the majority of its energy as well as performing other key functions. How mitochondrial processes are regulated within the cell is an important area of biology. The broad aims of this collaboration are to analyse processes involved in mitochondrial biogenesis using yeast and mammalian cells as model systems. In particular the protein import processes and mitochondrial stress responses will be studied. Th ....A unified approach to studies on mitochondrial biogenesis. Mitochondria supply the cell with the majority of its energy as well as performing other key functions. How mitochondrial processes are regulated within the cell is an important area of biology. The broad aims of this collaboration are to analyse processes involved in mitochondrial biogenesis using yeast and mammalian cells as model systems. In particular the protein import processes and mitochondrial stress responses will be studied. The outcomes of this work will enable us to gain an appreciation of the similarities and differences in processes that exist between organisms so that general, unifying models can be made.Read moreRead less
Conductance states of a brain glutamine transporter. Brain transporters are the target for many neuroactive drugs that are used to treat anxiety, depression and other psychotic disorders. Transport processes are also targeted to deliver neurotransmitter precursors to the brain to treat disorders such as Parkinson's disease. In this project we will study a transport process crucial for the function of neurons that release glutamate and GABA (gamma-aminobutyric acid) as neurotransmitters. The stud ....Conductance states of a brain glutamine transporter. Brain transporters are the target for many neuroactive drugs that are used to treat anxiety, depression and other psychotic disorders. Transport processes are also targeted to deliver neurotransmitter precursors to the brain to treat disorders such as Parkinson's disease. In this project we will study a transport process crucial for the function of neurons that release glutamate and GABA (gamma-aminobutyric acid) as neurotransmitters. The study of this transport process will be important for understanding disorders like epilepsy and other disorders affecting neuronal excitability.Read moreRead less
Identification of structural proteins in the tissue cyst wall of Toxoplasma gondii. Most infections with Toxoplasma gondii are asymptomatic, however, infection during pregnancy can lead to miscarriage or blindness, deafness and mental retardation in the developing baby. Furthermore, in AIDS patients, toxoplasmosis is the leading cause of fatal encephalitis as the normally dormant tissue cysts are reactivated in the absence of an effective immune system. In Australia, it has been estimated that ~ ....Identification of structural proteins in the tissue cyst wall of Toxoplasma gondii. Most infections with Toxoplasma gondii are asymptomatic, however, infection during pregnancy can lead to miscarriage or blindness, deafness and mental retardation in the developing baby. Furthermore, in AIDS patients, toxoplasmosis is the leading cause of fatal encephalitis as the normally dormant tissue cysts are reactivated in the absence of an effective immune system. In Australia, it has been estimated that ~30% of the population is infected with T. gondii and the occurrence of congenital toxoplasmosis is 0.2% of live births, which translates to roughly 500 cases/year. Our research will identify structural proteins in Toxoplasma cyst walls that will lead to the design of new strategies to control the diseases caused by these parasites.Read moreRead less
The effects of alpha-2-macroglobulin on amyloid formation and toxicity. The expected outcomes will provide major advances in understanding how the abundant human blood protein alpha-2-macroglobulin influences the formation of protein aggregates that underpin a number of serious diseases (e.g. Alzheimer's disease). The linkages involved are of the highest calibre and will give the Fellowship holder a unique opportunity for training in environments that are truly internationally leading-edge. Fur ....The effects of alpha-2-macroglobulin on amyloid formation and toxicity. The expected outcomes will provide major advances in understanding how the abundant human blood protein alpha-2-macroglobulin influences the formation of protein aggregates that underpin a number of serious diseases (e.g. Alzheimer's disease). The linkages involved are of the highest calibre and will give the Fellowship holder a unique opportunity for training in environments that are truly internationally leading-edge. Furthermore, the very high novelty and broad significance of this work indicate that it will produce high-impact publications which will tangibly assist Australia being recognized as a major contributor to international research outcomes of the highest quality.Read moreRead less
The role of turgor in hyphal extension of the Ascomycete Neurospora crassa. Cellular expansion is an absolute necessity during the growth and development of plants and fungi. This process relies heavily upon the accumulation of inorganic ions. Osmotically driven water influx then creates the hydrostatic pressure that underlies the increase in cell volume. Cellular expansion is normally asymmetric and localised in one small region, such as hyphal tip. How does the cell maintain the turgor that dr ....The role of turgor in hyphal extension of the Ascomycete Neurospora crassa. Cellular expansion is an absolute necessity during the growth and development of plants and fungi. This process relies heavily upon the accumulation of inorganic ions. Osmotically driven water influx then creates the hydrostatic pressure that underlies the increase in cell volume. Cellular expansion is normally asymmetric and localised in one small region, such as hyphal tip. How does the cell maintain the turgor that drives expansion? How is expansion controlled spatially? These questions will be addressed in this project by comprehensive study of ion transport processes in a model organism, Neurospora crassa, using osmotic sensitive and transport mutants.Read moreRead less
Role of autophagy in degradation of endoplasmic reticulum (ER)-localised protein aggregates. This study will provide a new understanding of protein aggregate accumulation in the endoplasmic reticulum (ER), a phenomenon that occurs in aging cells and protein conformational diseases, and under stress conditions and during secretory protein overexpression. This information will inform strategies to prevent the onset of protein conformational diseases and help identify targets for pharmaceutical int ....Role of autophagy in degradation of endoplasmic reticulum (ER)-localised protein aggregates. This study will provide a new understanding of protein aggregate accumulation in the endoplasmic reticulum (ER), a phenomenon that occurs in aging cells and protein conformational diseases, and under stress conditions and during secretory protein overexpression. This information will inform strategies to prevent the onset of protein conformational diseases and help identify targets for pharmaceutical intervention. In addition, a powerful model system for studies of ER protein aggregation will be established, high-level training in biochemistry and morphometry will be provided, and an international collaboration of the highest calibre will be initiated.Read moreRead less