A group of bacteria called Neisseria cause human-specific infections. To initiate infection, the bacteria must produce a hair-like surface structure, the pilus. The pilus consists mainly of a protein called pilin, and we now understand how pilin production is controlled. However 20 other genes are also involved in pilus production. This project aims to understand how these other genes are controlled and coordinated to assemble this structure that is central to the ability to cause disease.
Glycosylation Of Pili In Pathogenic Neisseria: Function In Disease And Potential As A Vaccine Antigen
Funder
National Health and Medical Research Council
Funding Amount
$150,880.00
Summary
Disease caused by Group B Neisseria meningitidis and Neisseria gonorrhoeae remain a significant health problem worldwide. There are currently no vaccines available for either of these bacteria. A surface structure found on these bacteria, called pili, are key in host colonisation and disease. Genetics and structural studies have identified that the protein subunits, which make up pili, are glycosylated - modified by the addition of sugars. The role of glycosylation in the disease process is not ....Disease caused by Group B Neisseria meningitidis and Neisseria gonorrhoeae remain a significant health problem worldwide. There are currently no vaccines available for either of these bacteria. A surface structure found on these bacteria, called pili, are key in host colonisation and disease. Genetics and structural studies have identified that the protein subunits, which make up pili, are glycosylated - modified by the addition of sugars. The role of glycosylation in the disease process is not known. It is possible that the glycosylation of pili is required for attachment to host cells or perhaps in evasion of the immune system. In our current studies, we have identified and analysed a number of genes involved in pili glycosylation, in bacteria which make structre that are know. We have also identified a series of new genes we believe are also involved in glycosylation. Some of these genes are involved in the biosynthesis of unknown structures and are common in bacteria isolated from patients with meningitis. We will identify these stuctures and characterise bacteria in which these genes have been inactivated so that we can examine the role of pili glycosylation in colonisation and disease. This study has the potential to yield important new information about the process of colonisation and disease, and also has the potential to facilitate novel approaches in vaccine development.Read moreRead less
Characterisation Of Antigenic Variation Of Neisserial Cell Surface Adhesins, And Their Role In Infection
Funder
National Health and Medical Research Council
Funding Amount
$556,983.00
Summary
A group of bacteria called Neisseria cause human-specific infections. They produce two types of surface proteins termed adhesins, which allow the bacteria to adhere to, and invade, human cells. There is circumstantial evidence to suggest the bacteria can rapidly vary the structure of these adhesins, even within a single infection. This project will determine whether, and how, this variation is occurring, and what effect it has on the ability of the bacteria to cause disease.
Investigating Molecular Mechanisms To Better Understand The Recent Rise In Food Allergy Prevalence In Australian Children
Funder
National Health and Medical Research Council
Funding Amount
$316,449.00
Summary
The prevalence of food allergies in Australia and abroad has risen drastically posing a major preventable public health burden. Further basic research is required and this program aims to make a substantial contribution towards understanding the underlying mechanisms of pediatric food allergy.