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Mechanistic studies of prokaryotic genome defense mechanisms

Project description

Insight into bacterial immunity

Bacteria possess numerous defence mechanisms to counteract bacteriophages, viruses that attack them. These mechanisms have evolved through the continuous race between host and viruses, and either induce programmed cell death via toxins or involve proteins which target and modify invading bacteriophage genomes. The EU-funded MSOPGDM project is investigating two previously unexplored defence mechanisms in prokaryotes. Through an interdisciplinary approach, researchers will undertake the biochemical and structural characterisation of defence proteins, aiming to shed light on bacterial molecular immunity. Moreover, insight into the genomic islands associated with these defence mechanisms will underpin their evolution.

Objective

The constant biological arms race between prokaryotic organisms and invading mobile genetic elements has resulted in the evolution of sophisticated genome defense mechanisms. The genes encoding for immunity commonly reside in genomic clusters known as defense islands that are in the vicinity of other host-defense loci. Recent studies of defense islands have uncovered ten novel host defense mechanisms whose molecular mechanisms remain elusive at present. The proposed project aims to provide a mechanistic basis for genetic immunity in two novel host defense systems: Druantia and Shedu. These systems contain genes encoding nucleases, ATPases and helicases, which strongly suggests that they provide immunity by directly targeting invading nucleic acids. To unravel the molecular mechanisms that underpin immunity in these systems, I will apply a highly interdisciplinary approach by using biochemical and state-of-the-art structural biology techniques, including high-throughput X-ray crystallography, cryo-EM and crosslink-coupled mass spectrometry. Understanding these mechanisms will provide fundamentally new insights into prokaryotic biology and the evolution of host-virus defense systems. Furthermore, these studies might uncover novel molecular activities that may be exploited for use as genetic engineering tools.

Fields of science (EuroSciVoc)

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Programme(s)

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Topic(s)

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Funding Scheme

Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.

MSCA-IF-EF-ST - Standard EF

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) H2020-MSCA-IF-2018

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Coordinator

UNIVERSITAT ZURICH
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 191 149,44
Address
RAMISTRASSE 71
8006 Zurich
Switzerland

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Region
Schweiz/Suisse/Svizzera Zürich Zürich
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 191 149,44
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