Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0560818
Funder
Australian Research Council
Funding Amount
$154,000.00
Summary
A Pico-Newton Scale Force Measurement Apparatus for Polymer Physics and Non-equilibrium Statistical Mechanics. We propose to build a state-of-the-art Optical Tweezers apparatus that measures small forces and torques on micron-sized objects located in 'optical traps'. Using a single laser beam and computer-generated holograms, we will create arrays of optical traps that move or 'dance', and alter the force/torque-imposing properties of each trap. This proposed research equipment will be used (1 ....A Pico-Newton Scale Force Measurement Apparatus for Polymer Physics and Non-equilibrium Statistical Mechanics. We propose to build a state-of-the-art Optical Tweezers apparatus that measures small forces and torques on micron-sized objects located in 'optical traps'. Using a single laser beam and computer-generated holograms, we will create arrays of optical traps that move or 'dance', and alter the force/torque-imposing properties of each trap. This proposed research equipment will be used (1) to study the physics of single synthetic polymer and naturally occuring biopolymer chains, (2) to quantify experimentally, and for the first time, newly predicted molecular-scale forces, and (3) to demonstrate new theories in non-equilibrium statistical mechanics that quantitatively describe the operation of nanomachines. Read moreRead less
Neutron Scattering in Biology. Australia's Replacement Research Reactor will be a world-class neutron source, and represents the country's largest single investment in scientific research infrastructure. It is now essential to stimulate its production of high-quality research in materials science, chemistry and biology. The applicant is a recognised world leader in the field of neutron scattering research, particularly in biology. His presence in the Bragg Institute, which manages the neutron ....Neutron Scattering in Biology. Australia's Replacement Research Reactor will be a world-class neutron source, and represents the country's largest single investment in scientific research infrastructure. It is now essential to stimulate its production of high-quality research in materials science, chemistry and biology. The applicant is a recognised world leader in the field of neutron scattering research, particularly in biology. His presence in the Bragg Institute, which manages the neutron scattering instruments on the reactor, will provide direction and impetus for the science that will be initiated there, advancing applications in materials science, medicine and biotechnology.Read moreRead less
Membrane-associated structure and the effect of metals on Abeta peptide from Alzheimer's disease. Alzheimer's disease currently affects 5% of Australians over 65, and will triple by year 2050 without an effective therapy. Much research to understand the causes of the disease has focused on the distinctive amyloid deposits found in patients' cerebral tissue. Recent evidence suggests that nerve cell death is actually directly caused by soluble forms of the protein fragments and metals that form th ....Membrane-associated structure and the effect of metals on Abeta peptide from Alzheimer's disease. Alzheimer's disease currently affects 5% of Australians over 65, and will triple by year 2050 without an effective therapy. Much research to understand the causes of the disease has focused on the distinctive amyloid deposits found in patients' cerebral tissue. Recent evidence suggests that nerve cell death is actually directly caused by soluble forms of the protein fragments and metals that form these deposits. We will investigate the specific molecular structure of these fragments with metals in relation to vesicles which mimic the nerve cell surface. This information may facilitate future biomedical efforts work to develop therapies, as well as develop general techniques to study similar structural problems.Read moreRead less
In-situ Scanning Probe Microscopy of biological redox processes: nanoscale structure and morphology. The science behind this project underpins the development of nanobiotechnology. Immediate applications foreseen, are the development of biosensors and diagnostic devices based on our intimate knowledge of the nature of the protein attachment to a surface. Use of synthetic membranes to create biomimetic surfaces will impact significantly on our understanding of the role and contribution membranes ....In-situ Scanning Probe Microscopy of biological redox processes: nanoscale structure and morphology. The science behind this project underpins the development of nanobiotechnology. Immediate applications foreseen, are the development of biosensors and diagnostic devices based on our intimate knowledge of the nature of the protein attachment to a surface. Use of synthetic membranes to create biomimetic surfaces will impact significantly on our understanding of the role and contribution membranes have on protein structure, function hence disease.Read moreRead less
Ionic Dispersion Forces in Physical Chemistry: Implications for pH, Electrochemistry, Nanoparticle Formation and Organic Synthesis. Our current understanding of charged systems in solution is deeply flawed . Existing theories are not predictive, mainly because they concentrate entirely on electrostatics. This proposal aims to partially rectify this by including the effects of previously neglected dispersion forces in a number of problems. These forces are responsible for much of the behaviou ....Ionic Dispersion Forces in Physical Chemistry: Implications for pH, Electrochemistry, Nanoparticle Formation and Organic Synthesis. Our current understanding of charged systems in solution is deeply flawed . Existing theories are not predictive, mainly because they concentrate entirely on electrostatics. This proposal aims to partially rectify this by including the effects of previously neglected dispersion forces in a number of problems. These forces are responsible for much of the behaviour seen in the following systems: the theory of electrolytes; electrochemistry pH and buffers; self energy effects in organic chemistry; and zeolite and nano-particle synthesis. The main outcome will be accurate and predictive theories for these systems.Read moreRead less
Protein self-assembly on surfaces, interfaces and nanoparticles. Surfaces such as those presented by an air-liquid interface or air-borne nanoparticles exert significant effects on protein aggregation in biological environments. We will develop a comprehensive theoretical and experimental approach to study the effects of such surfaces on the self assembly of proteins leading to disease causing amyloid fibrils. This will provide a molecular level understanding of protein self-association and a ....Protein self-assembly on surfaces, interfaces and nanoparticles. Surfaces such as those presented by an air-liquid interface or air-borne nanoparticles exert significant effects on protein aggregation in biological environments. We will develop a comprehensive theoretical and experimental approach to study the effects of such surfaces on the self assembly of proteins leading to disease causing amyloid fibrils. This will provide a molecular level understanding of protein self-association and a rational basis for the design of inhibitors to stop protein aggregation. The work will also establish design principles for new nanomaterials via the controlled self assembly of proteins on surfaces.Read moreRead less
Correlation between surface force and morphology of self-assembled monolayer. As a most potential solid support for biological molecules without denaturing their functions, gold thiol self-assembled monolayers (SAMs) have been studied extensively for surface fabrication. In this project we will prepare functional monolayers using newly synthesized thiol derivatives, evaluate correlation between surface force and surface morphology of the SAMs using the surface forces apparatus, and optimize the ....Correlation between surface force and morphology of self-assembled monolayer. As a most potential solid support for biological molecules without denaturing their functions, gold thiol self-assembled monolayers (SAMs) have been studied extensively for surface fabrication. In this project we will prepare functional monolayers using newly synthesized thiol derivatives, evaluate correlation between surface force and surface morphology of the SAMs using the surface forces apparatus, and optimize the condition to fabricate biological devices such as immune sensors.Read moreRead less
Macromolecular Condensates: From Globules to Toroids and Beyond. Polymers are long-chain molecules which are vital for all living things. Examples include proteins and DNA which carries all of the information needed for life. In the cell and in the laboratory these polymers are often found in a compact folded state. Current polymer science is good at describing very flexible polymers, but fails to describe most biological polymers which have backbones that are difficult to bend. Our aim is to ....Macromolecular Condensates: From Globules to Toroids and Beyond. Polymers are long-chain molecules which are vital for all living things. Examples include proteins and DNA which carries all of the information needed for life. In the cell and in the laboratory these polymers are often found in a compact folded state. Current polymer science is good at describing very flexible polymers, but fails to describe most biological polymers which have backbones that are difficult to bend. Our aim is to describe the folded or globular state for many kinds of biological polymers and thus improve our understanding of the role of polymers in living things.Read moreRead less
Dynamic Force Microscopy of small molecular assemblies. The possibility of manipulating a single molecule seems at first unreal, indeed 5 years ago it was pure science fiction. Through the gaining popularity of the Atomic Force Microscope (AFM) many perspectives about the molecular world are changing. Macroscopic effects such as adhesion and lubrication are now discussed in light of measurements made with this instrument. Newer work includes the observation of single protein unfolding experim ....Dynamic Force Microscopy of small molecular assemblies. The possibility of manipulating a single molecule seems at first unreal, indeed 5 years ago it was pure science fiction. Through the gaining popularity of the Atomic Force Microscope (AFM) many perspectives about the molecular world are changing. Macroscopic effects such as adhesion and lubrication are now discussed in light of measurements made with this instrument. Newer work includes the observation of single protein unfolding experiments. The biophysics oriented project detailed in this application will extend the AFM: into multi-molecular systems formed by self-assembly, such as cell membranes; into polyelectrolyte-surface interactions; and, finally into the sequencing of DNA.Read moreRead less
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