Bio-engineering Insect-Specific Flaviviruses for control of arboviruses. This project aims to study a family of commensal viruses of mosquitoes called insect-specific flaviviruses that are naturally found in mosquitoes and do not infect or cause disease in vertebrate hosts. Using an innovative approach, this project employs cutting-edge molecular virology approaches to modify these insect-specific flaviviruses to enhance their ability to block the replication of other pathogenic viruses in the m ....Bio-engineering Insect-Specific Flaviviruses for control of arboviruses. This project aims to study a family of commensal viruses of mosquitoes called insect-specific flaviviruses that are naturally found in mosquitoes and do not infect or cause disease in vertebrate hosts. Using an innovative approach, this project employs cutting-edge molecular virology approaches to modify these insect-specific flaviviruses to enhance their ability to block the replication of other pathogenic viruses in the mosquito vector. Expected outcome of this project is a bio-control strategy that is complementary to the Wolbachia approach. The anticipated benefits include the advancement of knowledge of insect-specific flaviviruses, and promotion of interdisciplinary research across the fields of Entomology and Virology.Read moreRead less
Transport and innate immune properties of DNA in bacterial nano-sized vesicles. All types of living organisms release nano-sized membrane vesicles or “blebs” which they use for intercellular communication and transport of molecules. This project will determine how bacteria package DNA within these vesicles, how this DNA is transported into host cells and how it triggers immune responses in these cells.
Biology and evolution of intracellular parasitism. This project will investigate the development of intracellular parasitism in environmental amoebae. The outcomes of this work will help to understand the mechanisms by which bacteria have evolved to survive inside cells and in some cases cause disease.
Characterization of metabolic networks in a microbial pathogen. New methods are needed to understand complex cellular processes such as metabolism. This proposal will support the development of methods in metabolite profiling and flux analysis that provide a global view of metabolic networks in cells and complement other profiling approaches, such as proteomics and transcriptomics. The development of these approaches (collectively termed Systems Biology) is essential for maintaining Australia sc ....Characterization of metabolic networks in a microbial pathogen. New methods are needed to understand complex cellular processes such as metabolism. This proposal will support the development of methods in metabolite profiling and flux analysis that provide a global view of metabolic networks in cells and complement other profiling approaches, such as proteomics and transcriptomics. The development of these approaches (collectively termed Systems Biology) is essential for maintaining Australia science at the forefront of international efforts (National Research Priority 3; Breakthrough science). This project will also directly contribute to our understanding of metabolism of an important human pathogen and provide training to young Australian scientists.Read moreRead less
Investigating why malaria parasites have a unique translocon. This project aims to explore the mechanism that enables malaria parasites to thrive in their host cells. Parasites that cause the disease malaria reside inside erythrocytes, a very basic cell that lacks a vesicular trafficking pathway. To survive and thrive in this environment, the parasite has evolved a completely unique cell biological phenomenon termed PTEX to transport its proteins into the host cell. The aim of this project is to ....Investigating why malaria parasites have a unique translocon. This project aims to explore the mechanism that enables malaria parasites to thrive in their host cells. Parasites that cause the disease malaria reside inside erythrocytes, a very basic cell that lacks a vesicular trafficking pathway. To survive and thrive in this environment, the parasite has evolved a completely unique cell biological phenomenon termed PTEX to transport its proteins into the host cell. The aim of this project is to determine how this novel PTEX machinery exports proteins into erythrocytes and whether PTEX is also required for parasite survival during the initial stages of a host infection when malaria reside in hepatocytes.Read moreRead less
Identifying Novel Biosynthetic Pathways in Mycobacteria using DNA Microarray Technology. DNA microarrays are a powerful new bioinformatics-based technology and an ideal tool for characterising complex biosynthetic pathways since the expression of all genes in the bacterial genome can be monitored in a single experiment. In this project we aim to construct and use a DNA microarray to identify novel biosynthetic pathways in mycobacteria. Of particular interest are pathways used to create compone ....Identifying Novel Biosynthetic Pathways in Mycobacteria using DNA Microarray Technology. DNA microarrays are a powerful new bioinformatics-based technology and an ideal tool for characterising complex biosynthetic pathways since the expression of all genes in the bacterial genome can be monitored in a single experiment. In this project we aim to construct and use a DNA microarray to identify novel biosynthetic pathways in mycobacteria. Of particular interest are pathways used to create components of the highly complex and poorly characterised cell wall. Since this structure is unique in the bacterial world, we expect to identify and characterise pathways that are unique to mycobacteria.Read moreRead less
The effects of damage and repair of fungal DNA on animal and plant diseases. DNA damage and its repair are implicated in enhancing the ability of fungi to cause disease. These processes enable genomic changes that generate fungal strains better adapted to host colonisation. This project will identify factors that influence mutation, virulence and host adaptation in two model fungi that cause devastating diseases - a human pathogen, Cryptococcus neoformans, and a plant pathogen, Leptosphaeria mac ....The effects of damage and repair of fungal DNA on animal and plant diseases. DNA damage and its repair are implicated in enhancing the ability of fungi to cause disease. These processes enable genomic changes that generate fungal strains better adapted to host colonisation. This project will identify factors that influence mutation, virulence and host adaptation in two model fungi that cause devastating diseases - a human pathogen, Cryptococcus neoformans, and a plant pathogen, Leptosphaeria maculans. Since increases in global temperatures are expected to lead to emerging fungal diseases, understanding effects of damage and repair of fungal DNA on animal and plant diseases is key to designing disease control approaches.Read moreRead less
Evolution of AB5 toxins. The proposed research program, using the combination of structural biology and cellular biology will provide insight into the evolution of AB5 toxins. This study will not only improve our fundamental understanding how pathogens evolve to invade hosts but could lead to the rational design of antimicrobials. The knowledge gained will increase Australia's international research profile.
Host cell targets of bacterial virulence effectors. The research described in this proposal will result in a better understanding of the cell biology of host-pathogen interactions. We are in a unique position to analyze the importance of protein/protein interactions between bacterial virulence determinants and host cell proteins using a range of cell biology techniques to address the fundamental, molecular basis of the host-pathogen interaction. In addition we will construct a new genetic tool ....Host cell targets of bacterial virulence effectors. The research described in this proposal will result in a better understanding of the cell biology of host-pathogen interactions. We are in a unique position to analyze the importance of protein/protein interactions between bacterial virulence determinants and host cell proteins using a range of cell biology techniques to address the fundamental, molecular basis of the host-pathogen interaction. In addition we will construct a new genetic tool to identify novel bacterial virulence determinants. We anticipate that a greater knowledge of the factors that contribute to the host-pathogen interaction will provide new insights into the subversion of host cell processes by bacterial pathogens of animals, plants and humans.
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Disulfide catalysis and protein folding in bacterial virulence. The molecular mechanisms that underpin disulfide bond formation have had a major impact on our understanding of protein folding and function. This project will make a major contribution to fundamental areas of disulfide catalysis pathways in bacterial pathogens and thus help maintain a strong international profile for Australian research in this field. The work will lead to training of research scientists and students in techniques ....Disulfide catalysis and protein folding in bacterial virulence. The molecular mechanisms that underpin disulfide bond formation have had a major impact on our understanding of protein folding and function. This project will make a major contribution to fundamental areas of disulfide catalysis pathways in bacterial pathogens and thus help maintain a strong international profile for Australian research in this field. The work will lead to training of research scientists and students in techniques that include molecular genetics, protein biochemistry and structural biology. Our findings may impact future directions for vaccine research on pathogens that cause life threatening infections in humans and therefore lead to improved health and reduced health care expenditure.Read moreRead less