Proteins form up to 25% of our diet. The first step in protein absorption is the digestion of protein into smaller units called peptides and amino acids. Both components are subsequently taken up by specialised cells in the wall of the intestine. In this project we plan to study how protein absorption occurs at the surface of these intestinal cells and investigate why this process fails in malabsorption syndromes, where the uptake of amino acids is impaired.
Investigation of a Phagocytic Synapse in the Uptake of Apoptotic Cells. Rapid clearance of cells that die by apoptosis is crucial for embryonic development, tissue turnover, and after inflammatory events. Specialised phagocytes engulf the apoptotic cell corpses in a way that minimises inflammation and prevents autoimmunity. Genetic studies have identified the key evolutionary receptors involved, but the molecular basis of this phagocytosis is still poorly understood. We have developed, and seek ....Investigation of a Phagocytic Synapse in the Uptake of Apoptotic Cells. Rapid clearance of cells that die by apoptosis is crucial for embryonic development, tissue turnover, and after inflammatory events. Specialised phagocytes engulf the apoptotic cell corpses in a way that minimises inflammation and prevents autoimmunity. Genetic studies have identified the key evolutionary receptors involved, but the molecular basis of this phagocytosis is still poorly understood. We have developed, and seek to establish, an integrated model that incorporates new findings to explain how the distinctive functions of specialised receptors can be orchestrated to achieve this function. A successful outcome to the project will provide new knowledge of value to human health.Read moreRead less
Examination of the Calcium Signalling Dynamics Linked to Integrin Adhesion Utilising a Novel Micro-imaging System. This study aims at increasing our understanding of the fundamental cell processes that allow cells to adhere to surfaces. The proposed study will lead to a greater understanding of the calcium signalling mechanisms that are fundamental to diverse biological phenomena such as, tissue regeneration and repair, blood clotting, cancer metastasis, and neuronal cell function. From a preven ....Examination of the Calcium Signalling Dynamics Linked to Integrin Adhesion Utilising a Novel Micro-imaging System. This study aims at increasing our understanding of the fundamental cell processes that allow cells to adhere to surfaces. The proposed study will lead to a greater understanding of the calcium signalling mechanisms that are fundamental to diverse biological phenomena such as, tissue regeneration and repair, blood clotting, cancer metastasis, and neuronal cell function. From a preventative health perspective, the investigation of platelet calcium signalling will greatly accelerate the development of new pharmaceuticals to tackle acute and chronic cardiovascular diseases, such as stroke, heart attack and artherosclerosis. Read moreRead less
Lipid raft and cyotoskeleton organization: How membrane domains give cells direction. For a large number of cells in our body it is imperative that they are able to orientate themselves relative to their environment, sense direction and translate incoming signals. To do so it is hypothesised that lipids on the cell surface are redistributed to form specialized domains. An asymmetric distribution of membrane domains can provide cells with a front and rear end and can further concentrate and co-or ....Lipid raft and cyotoskeleton organization: How membrane domains give cells direction. For a large number of cells in our body it is imperative that they are able to orientate themselves relative to their environment, sense direction and translate incoming signals. To do so it is hypothesised that lipids on the cell surface are redistributed to form specialized domains. An asymmetric distribution of membrane domains can provide cells with a front and rear end and can further concentrate and co-ordinate signalling molecules to a specific site. The project will determine the role of lipid domain in stabilizing cell shape and their remodelling during cell migration, the digestion of foreign particles and the formation of cell-cell contacts.Read moreRead less
This proposal concerns the biochemical investigation of a protein called GABA receptor which is a known target for various anti-anxiety drugs (anxiolytics), anti-convulsants, sedatives, depressants, anti-epilespy drugs, alcohol and anaesthetics. This work is expected to lead to the determination of the three-dimensional shape of the protein which will provide essential information about how the protein works and lay the foundation for the design and development of new drugs to control epilepsy, ....This proposal concerns the biochemical investigation of a protein called GABA receptor which is a known target for various anti-anxiety drugs (anxiolytics), anti-convulsants, sedatives, depressants, anti-epilespy drugs, alcohol and anaesthetics. This work is expected to lead to the determination of the three-dimensional shape of the protein which will provide essential information about how the protein works and lay the foundation for the design and development of new drugs to control epilepsy, act as general anaesthetics, relieve anxiety and induce sleep.Read moreRead less
Probing the four photosynthetic membrane protein complexes at work in situ in leaves. This proposal aims at sustainable improvements in plant productivity and photosynthetic adaptation in drastic Australian climates. In photosynthesis, membranes with the four multiprotein complexes use sunlight to make compounds that drive carbon assimilation. Instead of the usual dissection of photosynthetic membranes, this project will develop and refine the applicant's rapid, reliable, non-intrusive technique ....Probing the four photosynthetic membrane protein complexes at work in situ in leaves. This proposal aims at sustainable improvements in plant productivity and photosynthetic adaptation in drastic Australian climates. In photosynthesis, membranes with the four multiprotein complexes use sunlight to make compounds that drive carbon assimilation. Instead of the usual dissection of photosynthetic membranes, this project will develop and refine the applicant's rapid, reliable, non-intrusive techniques to probe the four membrane complexes at work in their native state in leaves. Two portable commercial instruments will potentially emerge from the techniques. This novel non-reductionist approach will identify key limitations to photosynthetic performance under stress, and insights into improvements for primary plant productivity.Read moreRead less
The cellulose synthase complex of the Arabidopsis primary cell wall. The polysaccharide cellulose is the basis for the wood and cotton fibre industries of Australia and much of our research on the mechanism of synthesis has been supported by those industries over the past decade. The present project focuses on the proteins making cellulose and how they organised into functional complexes that are able to make cellulose. The knowledge it provides, together with that from other projects, will move ....The cellulose synthase complex of the Arabidopsis primary cell wall. The polysaccharide cellulose is the basis for the wood and cotton fibre industries of Australia and much of our research on the mechanism of synthesis has been supported by those industries over the past decade. The present project focuses on the proteins making cellulose and how they organised into functional complexes that are able to make cellulose. The knowledge it provides, together with that from other projects, will move us towards the situation where we can manipulate the rate at which cellulose is produced and change its detailed properties. This opens the way to industry producing fibres with more desirable properties and producing novel cellulose-based materials tailored to specific applications.Read moreRead less
Functional Genomic Analysis of Exported DNAJ Molecules in the Malaria Parasite Plasmodium falciparum. Malaria is not only a global health problem, but also affects countries surrounding Australia like PNG and Indonesia, reducing the region's stability and prosperity. Environmental changes and increased mobility of people (eg. aid and security personnel) make Australia itself more prone to malaria. The project will translate recent genomic data into functional insights using frontier technology t ....Functional Genomic Analysis of Exported DNAJ Molecules in the Malaria Parasite Plasmodium falciparum. Malaria is not only a global health problem, but also affects countries surrounding Australia like PNG and Indonesia, reducing the region's stability and prosperity. Environmental changes and increased mobility of people (eg. aid and security personnel) make Australia itself more prone to malaria. The project will translate recent genomic data into functional insights using frontier technology to identify new intervention targets for P. falciparum infection. Developing novel targets is mandated by humanity, and also to safeguard Australia's region against the social and economical implication of this disease. An Australian developed intervention would increase the global visibility of its science, leading to increased investments.Read moreRead less
Polysaccharide Synthase Genes in Agro-Industrial Applications. Achievement of the project aims will generate valuable intellectual property and meet National Research Priorities by: enhancing our knowledge base for the production of renewable bio-fuels from crop residues, for an environmentally sustainable Australia; developing preventative healthcare through adoption of healthier diets, rich in non-starchy cell wall polysaccharides that help reduce the incidence and severity of cardiovascular d ....Polysaccharide Synthase Genes in Agro-Industrial Applications. Achievement of the project aims will generate valuable intellectual property and meet National Research Priorities by: enhancing our knowledge base for the production of renewable bio-fuels from crop residues, for an environmentally sustainable Australia; developing preventative healthcare through adoption of healthier diets, rich in non-starchy cell wall polysaccharides that help reduce the incidence and severity of cardiovascular disease, obesity, diabetes and some cancers; and by developing breakthrough science in emerging agricultural technologies. The alliance will foster an intellectual environment to provide world-class basic research outcomes and training of highly skilled graduates, thereby contributing to the 'knowledge nation'.Read moreRead less
The functional organisation of the trans-Golgi network: From cultured cells to physiological systems. This research will result in a better understanding of the secretory pathway of all eukaryotic cells, a process of broad biological and biomedical significance. It will impact on cell biology in the broadest sense, from membrane biogenesis to lipid domain organization, as well as membrane transport, protein structure and protein targeting. Furthermore, this work will utilize and develop fronti ....The functional organisation of the trans-Golgi network: From cultured cells to physiological systems. This research will result in a better understanding of the secretory pathway of all eukaryotic cells, a process of broad biological and biomedical significance. It will impact on cell biology in the broadest sense, from membrane biogenesis to lipid domain organization, as well as membrane transport, protein structure and protein targeting. Furthermore, this work will utilize and develop frontier technologies of live cell imaging and RNA interference as a genetic tool to investigate functions of a protein family. By training post-graduate students and post-doctoral staff, it will contribute to the expertise of cell biology in Australia. International collaborations will enhance connections between Australia and overseas research.Read moreRead less