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Synthesis of substrate analogues for probing catalytic mechanisms and specificity of enzymes involved in the metabolism of plant polysaccharides. The project is aimed at strengthening collaborations between research groups in Adelaide and France, with the specific objective of synthesizing substrate analogues as probes of enzymatic mechanisms and substrate specificity in polysaccharide hydrolases and synthases of barley. The chemical expertise resides in France, while the enzymatic work will be ....Synthesis of substrate analogues for probing catalytic mechanisms and specificity of enzymes involved in the metabolism of plant polysaccharides. The project is aimed at strengthening collaborations between research groups in Adelaide and France, with the specific objective of synthesizing substrate analogues as probes of enzymatic mechanisms and substrate specificity in polysaccharide hydrolases and synthases of barley. The chemical expertise resides in France, while the enzymatic work will be conducted largely in Australia. Exchange of research staff, particularly at the postgraduate student and research associate levels, is considered essential to capture the benefits of the complementary expertise and to extend an existing international collaboration. The target enzymes are of central importance in cell wall metabolism during development of higher plants.Read moreRead less
Molecular mechanisms of catalysis and the basis of substrate specificity in polysaccharide hydrolases. Reaction intermediates along hydrolytic pathways and molecular determinants of substrate specificity of barley B-glucan exo- and endohydrolases will be defined using crystallographic and kinetic analyses. These enzymes are of central importance in cell wall metabolism during development of higher plants, and in plant-pathogen interactions. Realization of the project objectives will not only pro ....Molecular mechanisms of catalysis and the basis of substrate specificity in polysaccharide hydrolases. Reaction intermediates along hydrolytic pathways and molecular determinants of substrate specificity of barley B-glucan exo- and endohydrolases will be defined using crystallographic and kinetic analyses. These enzymes are of central importance in cell wall metabolism during development of higher plants, and in plant-pathogen interactions. Realization of the project objectives will not only provide fundamental information on catalytic mechanisms, but will also provide opportunities to manipulate enzyme specificity. Further, site-directed mutagenesis of the enzymes will be used to generate glycosynthases, which will be evaluated for their ability to synthesise novel oligosaccharide and polysaccharide products, some of which might show immunomodulating activity.Read moreRead less
The metabolic and enzymatic regulation of C4 photosynthesis and its impact on photosynthetic productivity. Australia's tropical pastures are dominated by plants utilising the C4 photosynthetic pathway. World wide C4 grasslands contribute to approximately 20% of global primary productivity. C4 plants also include important crop species such as maize, sorghum and sugar cane and are considered ideal species for bio-fuel production. This project will use a novel functional genomic/metabolomics appro ....The metabolic and enzymatic regulation of C4 photosynthesis and its impact on photosynthetic productivity. Australia's tropical pastures are dominated by plants utilising the C4 photosynthetic pathway. World wide C4 grasslands contribute to approximately 20% of global primary productivity. C4 plants also include important crop species such as maize, sorghum and sugar cane and are considered ideal species for bio-fuel production. This project will use a novel functional genomic/metabolomics approach to provide fundamental insights into the biochemical regulation of C4 photosynthesis under different environmental conditions. This will aid in the development of mathematical models of C4 photosynthesis required in climate models of CO2 exchange and enhance our ability to improve photosynthetic performance of agricultural species.Read moreRead less
Development of new herbicides targeting enzymes involved in the biosynthesis of branched-chain amino acids. Modern agriculture is heavily reliant on the use of herbicides. An inevitable consequence of herbicide usage is that resistant weeds will develop. Therefore, there is a continuing need to develop new herbicides to kill these resistant species. Herbicides interact with vulnerable molecular targets in plants, such as photosynthesis or the biosynthesis of certain amino acids. This project wil ....Development of new herbicides targeting enzymes involved in the biosynthesis of branched-chain amino acids. Modern agriculture is heavily reliant on the use of herbicides. An inevitable consequence of herbicide usage is that resistant weeds will develop. Therefore, there is a continuing need to develop new herbicides to kill these resistant species. Herbicides interact with vulnerable molecular targets in plants, such as photosynthesis or the biosynthesis of certain amino acids. This project will attempt to develop new herbicides that act upon two molecular targets that are not exploited by herbicides that are used currently. We will design, synthesize and test a variety of new compounds as potential environmentally-benign herbicides.Read moreRead less
Design and evaluation of new environmentally-benign herbicides that inhibit branched-chain amino acid biosynthesis. Herbicides interfere with processes that occur in plants, such as photosynthesis or the biosynthesis of certain amino acids. In this project we will focus on branched-chain amino acid biosynthesis, designing and evaluating inhibitors of the first two enzymes in this process. Based on their three dimensional structures we will develop an understanding of the molecular features that ....Design and evaluation of new environmentally-benign herbicides that inhibit branched-chain amino acid biosynthesis. Herbicides interfere with processes that occur in plants, such as photosynthesis or the biosynthesis of certain amino acids. In this project we will focus on branched-chain amino acid biosynthesis, designing and evaluating inhibitors of the first two enzymes in this process. Based on their three dimensional structures we will develop an understanding of the molecular features that contribute to a potent inhibitor and those that are required for it to be effective upon plants. Using this information we will design and synthesis new compounds as potential environmentally-benign herbicides.Read moreRead less