Radical change in the architecture of a nucleus: loss of typical DNA organisation systems in dinoflagellates. The genetic blueprint of all higher cells is stored in the cell nucleus, and proteins called histones provide the filing system for compactly stacking and organising the cell's DNA. One group of organisms, the dinoflagellate algae, have lost this histone system. This project will provide insight into their alternative DNA management systems.
Unravelling transthyretin amyloid, bounding ahead using wallabies. Each protein in our body has a unique shape that enables it to function correctly. For unknown reasons, some proteins can change their shape, aggregate with other proteins and stick to the outside of cells of major organs or nerves. This prevents those cells from working properly and results in disease. Transthyretin is a protein that changes shape and aggregates in the heart of most people over the age of 70. The disease is call ....Unravelling transthyretin amyloid, bounding ahead using wallabies. Each protein in our body has a unique shape that enables it to function correctly. For unknown reasons, some proteins can change their shape, aggregate with other proteins and stick to the outside of cells of major organs or nerves. This prevents those cells from working properly and results in disease. Transthyretin is a protein that changes shape and aggregates in the heart of most people over the age of 70. The disease is called Senile Systemic Amyloidosis (SSA). It is not known how or why this happens. There is no cure or therapy. This project will use transthyretins from human and wallaby to explore a possible cause of SSA. If our hypothesis is correct, we will propose preventative actions to reduce the incidence of SSA in the future.Read moreRead less
Molecular evolution and toxinology of colubrid snake venom toxins. This project proposes to examine the origin and evolution of venom systems in advanced snakes (Caenophidia) focusing on the colubrid radiation comprising the rear-fanged species. Demonstration by us of the presence of a potent postsynaptic neurotoxin in the Durvenoy's secretions of the Asian ratsnake Elaphe radiata, an archetypal non-venomous colubrid species, forced a fundamental rethink of venom evolution. The toxin is homologo ....Molecular evolution and toxinology of colubrid snake venom toxins. This project proposes to examine the origin and evolution of venom systems in advanced snakes (Caenophidia) focusing on the colubrid radiation comprising the rear-fanged species. Demonstration by us of the presence of a potent postsynaptic neurotoxin in the Durvenoy's secretions of the Asian ratsnake Elaphe radiata, an archetypal non-venomous colubrid species, forced a fundamental rethink of venom evolution. The toxin is homologous with the three finger toxins, previously thought unique to elapids, and supports the role of venom as a key evolutionary innovation in the diversification of advanced snakes. This project extends this work to other species and toxin families.Read moreRead less
Defining the Molecular Targets of Evolution. With significant advances in next-generation sequencing technologies we now have the genomes of hundreds vertebrate species, but understanding how the differences and similarities within these genomes control species diversity is largely unknown. The similarity in skull shape between the thylacine and dogs coupled with their deep ancestry, having last shared a common ancestor over 160 million years ago, provides an unprecedented opportunity to examine ....Defining the Molecular Targets of Evolution. With significant advances in next-generation sequencing technologies we now have the genomes of hundreds vertebrate species, but understanding how the differences and similarities within these genomes control species diversity is largely unknown. The similarity in skull shape between the thylacine and dogs coupled with their deep ancestry, having last shared a common ancestor over 160 million years ago, provides an unprecedented opportunity to examine how evolution works at the DNA level. This proposal will determine if animals that develop identical skull shapes, also show identical changes in their DNA. The findings will define new developmental genes and explain how selection, adaptation and evolution works at the DNA level. Read moreRead less
Molecular-genetic organization and evolution of dinoflagellate mitochondria. Dinoflagellates are unicellular organisms that are important parts of the biota as significant primary producers of the oceans. Certain dinoflagellates form essential symbionts of reef-forming corals and loss of the symbiont causes coral bleaching and death, a phenomenon linked to global warming. Dinoflagellate blooms are also notorious for causing fish kills and human illnesses such as paralytic shellfish poisoning. My ....Molecular-genetic organization and evolution of dinoflagellate mitochondria. Dinoflagellates are unicellular organisms that are important parts of the biota as significant primary producers of the oceans. Certain dinoflagellates form essential symbionts of reef-forming corals and loss of the symbiont causes coral bleaching and death, a phenomenon linked to global warming. Dinoflagellate blooms are also notorious for causing fish kills and human illnesses such as paralytic shellfish poisoning. My studies of the mitochondrion will address a major aspect of the biology of this poorly understood group. Mitochondrial function is often a target for drugs and other controlling agents, and therefore these studies could offer scope to better interpret and manage dinoflagellates in our environment.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE220100185
Funder
Australian Research Council
Funding Amount
$438,712.00
Summary
Decoding the evolution of killer T cell immunity across human lifetime. The immune system is a potent weapon for protection against pathogens. T cells have a central role as their receptors monitor the body for threats. The thymus (organ) educates receptors to discriminate between healthy and infected cells. Receptor diversity and T cell strength change throughout human life. This project aims to unravel how T cells gain and lose optimal receptors and strength. The aims are to understand 1) The ....Decoding the evolution of killer T cell immunity across human lifetime. The immune system is a potent weapon for protection against pathogens. T cells have a central role as their receptors monitor the body for threats. The thymus (organ) educates receptors to discriminate between healthy and infected cells. Receptor diversity and T cell strength change throughout human life. This project aims to unravel how T cells gain and lose optimal receptors and strength. The aims are to understand 1) The role of thymic education in diversifying receptors 2) Whether gradual loss of thymic education affects receptor diversity 3) The molecular mechanisms underlying T cell strength. The project is essential for understanding how optimal T cell immunity is formed, critical if we wish to harness this to improve healthy aging.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE190100085
Funder
Australian Research Council
Funding Amount
$414,864.00
Summary
Elucidating a novel mechanism for coping with harmful mutations. This project aims to improve our understanding of the complex regulatory mechanisms that increase genetic and phenotypic robustness. Survival of organisms depends on their ability to cope with genetic variation. A novel process of genetic compensation has recently been identified, producing a normal phenotype in a homozygous mutant, that would be expected to have deleterious effects. This project will reveal how compensation is ach ....Elucidating a novel mechanism for coping with harmful mutations. This project aims to improve our understanding of the complex regulatory mechanisms that increase genetic and phenotypic robustness. Survival of organisms depends on their ability to cope with genetic variation. A novel process of genetic compensation has recently been identified, producing a normal phenotype in a homozygous mutant, that would be expected to have deleterious effects. This project will reveal how compensation is achieved by examining the molecular pathways that are activated following genetic mutation. This project is expected to strengthen Australian reputation in evolutionary genetics, and in turn enhance our understanding of how organisms adapt to changing environments.Read moreRead less
Nucleomodulin effectors of the environmental pathogen Legionella. This project aims to examine the evolution of Legionella as an intracellular organism and the mechanisms by which the bacteria evade environmental predation by amoebae. Aside from the advancement of knowledge, expected outcomes of this project include a greater understanding of amoebae. This will provide significant benefits, and this knowledge may be used to develop inhibitors of amoebae growth.
A high-through-put method for unlocking the mitochondrial genomes of significant pathogens. The national/community benefits of this research are: (1) to develop a long-term, high quality scientific and technological program contributing to national objectives, including the maintenance of a strong capability in basic research, the development of new scientific concepts and the enhancement of international collaborative links; (2) to strengthen the links between basic and applied research; (3) to ....A high-through-put method for unlocking the mitochondrial genomes of significant pathogens. The national/community benefits of this research are: (1) to develop a long-term, high quality scientific and technological program contributing to national objectives, including the maintenance of a strong capability in basic research, the development of new scientific concepts and the enhancement of international collaborative links; (2) to strengthen the links between basic and applied research; (3) to develop excellence in research by promoting collaborative research, resulting in a more efficient use of resources in a national and international context; (4) to enhance the skills-base in biology and biotechnology; and (5) to substantially increase global visibility through quality research, leading to an increased investment in Australian science.Read moreRead less
The development and evolution of the pelvic girdle in basal gnathostomes. Comparing the development of muscles, cartilage and bone in representatives of all three major groups of fish will provide information as to how structures evolved but also how the adult morphology is distributed in phylogeny. Because so little is known about the genetic mechanisms underlying the formation of the pelvic girdle in fish, it is important to start studying a model animal such as the zebrafish. The pathways unc ....The development and evolution of the pelvic girdle in basal gnathostomes. Comparing the development of muscles, cartilage and bone in representatives of all three major groups of fish will provide information as to how structures evolved but also how the adult morphology is distributed in phylogeny. Because so little is known about the genetic mechanisms underlying the formation of the pelvic girdle in fish, it is important to start studying a model animal such as the zebrafish. The pathways uncovered have the potential to describe mechanisms common to all jawed vertebrates, not only common to fish. Understanding the mechanisms that generate major morphological transition in the vertebrate lineage necessarily informs us about our own evolutionRead moreRead less