Structure and Action of the Metazoan Disaggregase Complex (360G-Wellcome-109094_Z_15_A)

The metazoan Hsp70 disaggregase system is the only known human protein complex capable of resolubilising aggregated protein, conferring a protective phenotype for a range of pathologies. Disaggregation occurs through the dynamic assembly of a Hsp70/110 complex, initiated by J-protein recruitment of substrate. The structure of the active complex is currently unknown, as is the mechanism of disaggregation. This project will employ an interdisciplinary approach to structurally characterise the disaggregation of alpha-synuclein amyloid fibres in vitro by the human proteins DNAJB1 (J-protein), Hsc70 (Hsp70) and Apg2 (Hsp110). There will be a primary focus on understanding two particular elements of disaggregation. Firstly, how do J-proteins recruit substrate to activate disaggregation? This will be investigated using electron tomography, taking advantage of the recent "resolution revolution" in the electron microscopy field. Secondly, what is the mechanism of the active disaggregase complex as it is resolubilising aggregates? To answer this, we aim to track individual alpha-synuclein fibres by atomic force microscopy and total internal reflection fluorescence microscopy as they are solubilised during disaggregation. Given the role of aggregation in a broad range of debilitating diseases, increasing the understanding of disaggregation in humans has the potential to eventually lead to significant public health benefits.

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Grant Details

Amount Awarded 0
Applicant Surname Beton
Approval Committee Internal Decision Panel
Award Date 2017-01-31T00:00:00+00:00
Financial Year 2016/17
Grant Programme: Title PhD Studentship (Basic)
Internal ID 109094/Z/15/A
Lead Applicant Mr Joseph Beton
Partnership Value 0
Planned Dates: End Date 2019-09-30T00:00:00+00:00
Planned Dates: Start Date 2016-10-01T00:00:00+00:00
Recipient Org: Country United Kingdom
Region Greater London