urTREAM · Uncovering the regulation of transthiolating and RING E3 ligase activity by metabolites

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Project objective

The ubiquitin system, a central regulator of cellular processes, relies on the activity of approximately 650 E3 ligases to mediate the ubiquitination of cellular entities. This activity is tightly regulated to avoid aberrant ubiquitination, a hallmark of numerous diseases. While several regulatory layers of ligase activity have been documented, a novel factor – activity control by metabolites – remains vastly underexplored. A key bottleneck for uncovering metabolite-driven regulation has been the lack of appropriate tools for activity read-out of cellular ligases. However, in the past few years, innovative activity-based probes have been added to our toolbox. In this proposal, I will exploit complementary E2~Ub-mimicking probes to monitor the proteome-wide activity of both transthiolating and single subunit RING E3 ligases after manipulation of intracellular metabolite pools. By coupling mass-spectrometry-aided ligase-agnostic profiling with biophysical characterisation of the interaction, I will chart the metabolite E3 landscape, deepen our mechanistic understanding of ubiquitin regulation, and uncover new therapeutic entry points for diseases such as cancer and neurodegeneration.

Original text from CORDIS.

Participants

• UNIVERSITY OF DUNDEE · DundeeCoordinatorUnited Kingdom

Links

• View on CORDIS
• DOI: 10.3030/101277429