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THE ROLE OF O GlcNAc IN BACTERIAL SIGNAL TRANSDUCTION AND VIRULENCE

O-GlcNAc modification of specific serines/threonines on intracellular proteins in higher eukaryotes has been shown to directly regulate important processes such as the cell cycle, insulin sensitivity and transcription. This dynami... ver más

31/10/2014

UNIVDUN

100K€

Presupuesto del proyecto: 100K€

Líder del proyecto

UNIVERSITY OF DUNDEE No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2014-10-31 No tenemos la información de la convocatoria

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UNIVDUN

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Líder del proyecto

UNIVERSITY OF DUNDEE No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 100K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto O-GlcNAc modification of specific serines/threonines on intracellular proteins in higher eukaryotes has been shown to directly regulate important processes such as the cell cycle, insulin sensitivity and transcription. This dynamic modification, which shows interplay with protein phosphorylation, is regulated by two counteracting proteins, which catalyse transfer of GlcNAc from UDP-GlcNAc to specific serines/threonines on protein substrates (by O-GlcNAc transferase) and the subsequent hydrolysis (by O-GlcNAcase). Disruption of O-GlcNAc levels within the cell has been shown to be associated with neurodegenerative diseases, cancer and diabetes. Despite recent biochemical and structural advances in the O-GlcNAc field, our understanding of the precise functional implications of O-GlcNAc is still limited. Furthermore, we do not understand how O-GlcNAc transferase and O-GlcNAc hydrolase, recognise protein substrates and achieve selectivity. Interestingly, O-GlcNAc modification of proteins is not restricted to higher organisms. It is now emerging that bacteria, in particular pathogenic bacteria, are able to glycosylate a range of proteins. Many pathogenic bacteria that either have the ability to penetrate and replicate, or inject virulence factors in the host cells, thus disrupting the normal function of the host proteins within the cell. Furthermore, preliminary data suggests that some bacteria glycosylate their own proteins within the cell. With the help of the Marie Curie International Reintegration Grant, I aim to experimentally test the hypothesis that some of these O-GlcNAc modifying proteins are secreted bacterial virulence factors, targeting specific proteins in the host cell. In addition, I intend to investigate bacteria that can O-GlcNAc modify their own intercellular proteins. Thus, both types O-GlcNAc modifications provide an attractive target for therapeutic intervention against bacterial pathogens.

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