Evolutionary genetics of bovid genomes over 60,000 years. This project will provide data critical for understanding the genetic background of modern cattle and bison, and how humans have shaped factors such as milk yield, growth rates and muscle mass. It will also reveal genes and genomic regions that were favoured in the domestication process, including those potentially linked to genes of commercial interest for future research. This pioneering ancient DNA approach will also be applicable to a ....Evolutionary genetics of bovid genomes over 60,000 years. This project will provide data critical for understanding the genetic background of modern cattle and bison, and how humans have shaped factors such as milk yield, growth rates and muscle mass. It will also reveal genes and genomic regions that were favoured in the domestication process, including those potentially linked to genes of commercial interest for future research. This pioneering ancient DNA approach will also be applicable to a variety of other domestic crops and animals. The unique temporal analysis of microevolution will provide crucial data for genetic research, and groundproof our attempts to analyse the timing and nature of human evolutionary history, major domestication events and inform conservation management.Read moreRead less
Antibody Mutation Promotes Translocation: A Natural Cause Of Cancer
Funder
National Health and Medical Research Council
Funding Amount
$308,849.00
Summary
During responses to infection, the antibody genes in responding B cells mutate at a high rate, resulting in B cells producing better antibodies. Although essential for long-lived immunity, antibody mutation involves the introduction of DNA breaks which can occasionally cause leukemia or lymphoma. We understand only poorly how DNA repair systems normally make sure that antibody mutation is benign and does not cause cancer.
How sexually antagonistic genes and sexual selection influence the evolution of the Y chromosome. Sexually antagonistic genes are beneficial to members of one sex, but costly to the other. They are of significance both to the coevolution between the sexes and the evolution of the sex chromosomes. We will measure the sexually antagonistic effects of genes that make male guppies sexually attractive. We will then study how these genes, and the process of sexual selection that favours them influence ....How sexually antagonistic genes and sexual selection influence the evolution of the Y chromosome. Sexually antagonistic genes are beneficial to members of one sex, but costly to the other. They are of significance both to the coevolution between the sexes and the evolution of the sex chromosomes. We will measure the sexually antagonistic effects of genes that make male guppies sexually attractive. We will then study how these genes, and the process of sexual selection that favours them influence the process of recombination between the X and Y chromosomes.Read moreRead less
Meiotic recombination in Neurospora crassa: a model for the process in humans and other multicellular eukaryotes. Genes are shuffled by recombination during meiosis in the sexual cycle of higher organisms. This is best understood in yeast. Our findings show Neurospora recombination differs from yeast recombination. It is more tolerant of sequence mismatch, differs in the relative frequencies of gene conversion and crossing over, has frequently interrupted conversion tracts and has transacting ge ....Meiotic recombination in Neurospora crassa: a model for the process in humans and other multicellular eukaryotes. Genes are shuffled by recombination during meiosis in the sexual cycle of higher organisms. This is best understood in yeast. Our findings show Neurospora recombination differs from yeast recombination. It is more tolerant of sequence mismatch, differs in the relative frequencies of gene conversion and crossing over, has frequently interrupted conversion tracts and has transacting genes controlling recombination hotspot activity. We propose to genetically dissect Neurospora recombination which appears to be a closer model for recombination in humans and other higher eukaryotes, where understanding recombination can assist control of genetic disease, efficient breeding in agriculture and our understanding of evolution.Read moreRead less
Genetic analysis of cohesin function and regulation in Drosophila. In yeast, a multiprotein complex, called cohesin, holds newly replicated chromatids together until the cell is ready to partition each chromatid into its daughter cells. We and others have shown that cohesins are regulated differently in animal cells. We propose to combine classical genetic analyses with two new and innovative techniques, time-lapse confocal microscopy of fluorescent proteins in living cells and gene-specific kno ....Genetic analysis of cohesin function and regulation in Drosophila. In yeast, a multiprotein complex, called cohesin, holds newly replicated chromatids together until the cell is ready to partition each chromatid into its daughter cells. We and others have shown that cohesins are regulated differently in animal cells. We propose to combine classical genetic analyses with two new and innovative techniques, time-lapse confocal microscopy of fluorescent proteins in living cells and gene-specific knockout techniques to study key cohesin regulators in Drosophila. These studies will provide us with novel insights into how multicellular organisms regulate the structure and stability of their chromosomes.Read moreRead less
Functional characterization of SSB2: a novel single-stranded DNA binding protein. Defects in the DNA damage response pathway underpin many human genetic disorders and diseases. A detailed understanding of this pathway has enormous implications for future medicine. The proposed research will lead to functional characterization of a new protein, identify new concepts in DNA damage repair pathways, train young researchers and place Australia among the leaders in this internationally significant and ....Functional characterization of SSB2: a novel single-stranded DNA binding protein. Defects in the DNA damage response pathway underpin many human genetic disorders and diseases. A detailed understanding of this pathway has enormous implications for future medicine. The proposed research will lead to functional characterization of a new protein, identify new concepts in DNA damage repair pathways, train young researchers and place Australia among the leaders in this internationally significant and highly competitive area of research. It will underpin the national research priority of Promoting and Maintaining Good Health and help Australia capitalise on a plethora of opportunities for future economic and health benefits.Read moreRead less
A genomic approach to the mechanism of meiotic recombination in Neurospora. Recombination shuffles DNA sequences between homologous chromosomes during the reduction division in the life cycle of higher organisms. Along with mutation, it is a key process in evolution. Understanding of the molecular processes involved in recombination is largely based on yeast, which is intolerant of significant levels of sequence mismatch, limiting the resolution of analyses of normal recombination events. We hav ....A genomic approach to the mechanism of meiotic recombination in Neurospora. Recombination shuffles DNA sequences between homologous chromosomes during the reduction division in the life cycle of higher organisms. Along with mutation, it is a key process in evolution. Understanding of the molecular processes involved in recombination is largely based on yeast, which is intolerant of significant levels of sequence mismatch, limiting the resolution of analyses of normal recombination events. We have shown that Neurospora, like other less tractable multicellular eukaryotes, is tolerant of sequence mismatch, allowing high resolution analysis of individual recombination events. This project will build on fundamental advances we have already made in understanding how recombination occurs.Read moreRead less
Many Ys in monotremes: multiple sex chromosomes and sex determination in platypus and echidna. Platypus and Echidna are Australian icons, even featuring on our coins. Their unusual biology and ancient relationship to humans make them unique for understanding the mammalian genome, as demonstrated by our recent discovery of ten sex chromosomes in platypus that link mammal and bird sex. Still little is known about their genome, embryo development and how sex is determined. We will identify new gene ....Many Ys in monotremes: multiple sex chromosomes and sex determination in platypus and echidna. Platypus and Echidna are Australian icons, even featuring on our coins. Their unusual biology and ancient relationship to humans make them unique for understanding the mammalian genome, as demonstrated by our recent discovery of ten sex chromosomes in platypus that link mammal and bird sex. Still little is known about their genome, embryo development and how sex is determined. We will identify new genes on all ten sex chromosomes and investigate how they determine sex. The set up of an Australian Monotreme Resource Centre will be crucial for this research and attract worldwide high profile collaborations. We will answer important general questions in monotreme biology and contribute to our understanding of sexual abnormalities in humans.Read moreRead less
Developmental regulation of plant mitochondrial genome structure and copy number. Recombination is a major driving force behind mitochondrial DNA evolution and is responsible for the occurrence of cytoplasmic male sterile plants that are used by plant breeders to obtain high yield hybrids. A better understanding of the mechanisms that underlie mitochondrial and chloroplast genome maintenance and segregation will be a major fundamental scientific advance that will permit an integrated picture of ....Developmental regulation of plant mitochondrial genome structure and copy number. Recombination is a major driving force behind mitochondrial DNA evolution and is responsible for the occurrence of cytoplasmic male sterile plants that are used by plant breeders to obtain high yield hybrids. A better understanding of the mechanisms that underlie mitochondrial and chloroplast genome maintenance and segregation will be a major fundamental scientific advance that will permit an integrated picture of the interactions between the three plant genomes (nuclear, mitochondrial and chloroplastic). It is also a pre-requisite for the future manipulation of the cytoplasmic genomes leading to new ways to develop varieties with modified cytoplasms.Read moreRead less
Novel roles for importin alpha proteins in the nucleus. The project will provide fundamental new information about how changes in cell function are influenced by importin (IMP) alpha proteins, both through changes in gene transcription and through alterations to intracellular transport. These findings will inform areas of national priority that include Aging Well, Aging Productively with specific regard to cellular stress responses, and A Healthy Start to Life in the context of production of hea ....Novel roles for importin alpha proteins in the nucleus. The project will provide fundamental new information about how changes in cell function are influenced by importin (IMP) alpha proteins, both through changes in gene transcription and through alterations to intracellular transport. These findings will inform areas of national priority that include Aging Well, Aging Productively with specific regard to cellular stress responses, and A Healthy Start to Life in the context of production of healthy, genetically intact sperm. This project draws together an international team to investigate a phenomenon with implications for new understanding of normal developmental processes and the response of cells/tissues to disease conditions.Read moreRead less