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Regulation of principal components of the antioxidant system in table grapes. An expanded ?health-claims? system will likely be enacted by Food Standards Australia New Zealand within two years. Horticultural industries are attracted to the promotional ?point of difference? this offers. Many health-promoting compounds are antioxidants, including polyphenols that are abundant in fruit such as grape and citrus. Antioxidants are also involved in the plant's defences against abiotic and biotic stres ....Regulation of principal components of the antioxidant system in table grapes. An expanded ?health-claims? system will likely be enacted by Food Standards Australia New Zealand within two years. Horticultural industries are attracted to the promotional ?point of difference? this offers. Many health-promoting compounds are antioxidants, including polyphenols that are abundant in fruit such as grape and citrus. Antioxidants are also involved in the plant's defences against abiotic and biotic stress. Here, the WA Table Grape industry has committed funds for an APAI to study regulation of antioxidants in relation to nutritional and postharvest qualities. Effects of preconditioning with mild oxidative stresses will be assayed, postharvest, using molecular and biochemical techniques.Read moreRead less
Effects Of The Atrial Natriuretic Factor Enhancer And The 5'HS4 Insulator On The Probability Of Gene Expression.
Funder
National Health and Medical Research Council
Funding Amount
$534,628.00
Summary
Complex organisms contain many different types of cells, which can have completely different appearances and functions. All of these cells contain the same genes; the differences between them are achieved by the selective use of the genes. The means by which the selective use of genes is accomplished is a key to understanding how complex organisms develop, and how that development goes awry in cancer, heart disease, and other common disorders. A very large body of evidence indicates that gene re ....Complex organisms contain many different types of cells, which can have completely different appearances and functions. All of these cells contain the same genes; the differences between them are achieved by the selective use of the genes. The means by which the selective use of genes is accomplished is a key to understanding how complex organisms develop, and how that development goes awry in cancer, heart disease, and other common disorders. A very large body of evidence indicates that gene regulation is accomplished by the interaction of protein factors with segments of DNA flanking the gene. One hypothesis underlying our work is that the flanking DNA elements act primarily to increase the probability that a gene will be active rather than silent. We will ask if removing a known regulatory element from the gene for Atrial Natriuretic Factor (ANF) in mice reduces the likelihood of ANF being expressed by heart cells when the heart is stressed. This experiment will also shed new light on an extremely common disease state in humans (cardiac hypertrophy). In a second experiment, we will use a new experimental system we have developed to ask if a gene regulatory element is able to dial up the amount of expression from a gene, as well as to switch the gene on. Our previous work suggested this was not the case, but we wish to conduct a more rigorous test. Another hypothesis is that no DNA element is able to completely shield a transferred gene from the regulatory elements surrounding it. Accordingly, we will test a DNA element that has been proposed to insulate any gene from all influences of surrounding genes, and ask if it is able to create an autonomously expressing gene at any site within the genome. Because they deal with functions that are common to all genes, these experiments will provide information that should be applicable to a broad array of efforts to manipulate gene expression.Read moreRead less
Post-transcriptional Regulation Of Plasminogen Activator Inhibitor 2 Gene Expression
Funder
National Health and Medical Research Council
Funding Amount
$508,838.00
Summary
Plasminogen activator inhibitor type 2 (PAI-2) is a protease inhibitor that has intracellular and extracellular functions. The PAI-2 gene is highly regulated at the level of PAI-2 mRNA stability. We have identified regions within the PAI-2 transcript essential for this regulation and a number of novel proteins that engage these regions. This project is aimed at understanding how these and other proteins control PAI-2 expression at the mRNA level.
New biotech methods for crop quality assurance. Quality assurance of crop products is a key for Australia to be competitive in the world marketplace. The power of molecular diagnostics has not been applied to this important but neglected part of the produce handling chain. In this project research will be undertaken that will lead to low cost on site assays to test for variety preservation, contamination, and presence of pests and diseases. It employs the tools of genomics and proteomics to p ....New biotech methods for crop quality assurance. Quality assurance of crop products is a key for Australia to be competitive in the world marketplace. The power of molecular diagnostics has not been applied to this important but neglected part of the produce handling chain. In this project research will be undertaken that will lead to low cost on site assays to test for variety preservation, contamination, and presence of pests and diseases. It employs the tools of genomics and proteomics to provide basic understanding of processes which can be developed into cost effective analyses for practical use by industry to ensure quality assurance.Read moreRead less
Alternative Splicing Of GLI1 And Its Role In Tumourigenesis
Funder
National Health and Medical Research Council
Funding Amount
$392,640.00
Summary
Gene expression involves the transfer of information from DNA to proteins and is mediated by a third molecule called messenger RNA (mRNA). The process is tightly controlled since unregulated gene expression is harmful and can result in diseases such as developmental disorders and cancer. The genetic information in DNA is first copied to an RNA molecule in a process called transcription. This RNA molecule then undergoes a series of maturation steps before the information it carries can be transla ....Gene expression involves the transfer of information from DNA to proteins and is mediated by a third molecule called messenger RNA (mRNA). The process is tightly controlled since unregulated gene expression is harmful and can result in diseases such as developmental disorders and cancer. The genetic information in DNA is first copied to an RNA molecule in a process called transcription. This RNA molecule then undergoes a series of maturation steps before the information it carries can be translated into a protein. One of these maturation steps involves the removal of sequences (called introns) that do not contain protein coding information from the sequences (called exons) that will be present in the mature mRNA. Some genes contain no introns while others contain 20 or more, which are dispersed throughout the gene. The removal of intron sequences from immature RNA molecules is called splicing and is carried out by a macromolecular complex that recognises the intron sequences, cuts them out of the RNA and then rejoins the RNA to make a contiguous sequence. This process has to be precise otherwise spurious sequences will be present in the mRNA, which will result in the production of abnormal proteins. In addition, for some genes mRNAs are produced that have differences in a portion of their sequence. These alternative sequences are generated by the inclusion or exclusion of alternative exons. Because, RNA splicing is critical to the production of mature mRNAs and because it can generate sequence diversity it is tightly regulated. We have recently found that expression of a cancer gene (called GLI1) is regulated in part by the use of alternative GLI1 mRNAs. Moreover, we found that the expression of one of these alternative GLI1 mRNAs is associated with skin cancer. In this project we will investigate the molecular mechanisms that regulate alternative splicing in GLI1 and identify whether changes in these mechanisms result in cancer.Read moreRead less
Investigation Into The Alternative Splicing Of Steroid Hormone Regulated Genes In Breast Cancer.
Funder
National Health and Medical Research Council
Funding Amount
$292,216.00
Summary
Steroid hormones have imortant roles in breast tissue growth and differentiation. We have identified several proteins called PRMT6 and CAPER's , that are involved in steroid hormone signaling and control the alternative splicing of RNA, the process in which several different proteins can be produced from a single gene. Our aim is to study these proteins in an effort to understand how they influence alternative splicing and to identify genes they control in relation to breast cancer.