Project description
Insight into the complex nature of disordered proteins
Intrinsically disordered proteins (IDPs) are a family of proteins that lack persistent 3D structure. They constitute up to 40 % of the proteome and participate in the formation of liquid–liquid phase separation (LLPS) driven assemblies that facilitate numerous biochemical interactions. The EU-funded DisCharge project aims to study two regulators of chromatin structure and function, the nucleosome binding linker histone (H1) and its nuclear chaperone prothymosin-alpha (ProTa). Researchers will probe the interaction between these two proteins and study the impact on heterochromatin assembly formation, which leads to transcriptional regulation. Results will shed light on the factors that drive the behaviour and function of this intriguing class of proteins.
Objective
Biological molecular recognition is centred around the structure-function paradigm, involving interfacial complementary shapes and non-covalent forces. Intrinsically disordered proteins (IDPs), constituting up to 40% of the proteome, evade the structure-function paradigm, owing to their lack of persistent structure. Despite some IDPs forming folded complexes, numerous IDPs form disordered complexes stabilized by multivalent interactions. An extreme example is the recently discovered disordered high-affinity complex formed by two highly charged IDPs, the nucleosome binding linker histone (H1) and its nuclear chaperone prothymosin-alpha (ProTa), both key regulators of chromatin-structure and -function. IDPs are also often implicated in liquid-liquid phase separation (LLPS) driven assemblies that facilitate numerous biochemical interactions. The specificity question in IDPs becomes particularly pertinent for such charge driven disordered interactions and associated LLPS processes considering the great abundance of such highly charged disordered stretches in our proteome. Specific physiological function of most IDP interactions and associated LLPS processes imply an important role of specificity, albeit encoded differently from folded proteins. Only a multidisciplinary study spanning several complexity regimes, which is currently lacking, can uncover such altered specificity. I hypothesize that physiologically, ProTa/H1 interaction plays out in LLPS-driven heterochromatin assemblies leading to transcriptional regulation. I will probe ProTa/H1 interactions and phase behaviour with a set of systematically designed variants in incrementally complex milieu, from the test-tube to the cell, to reveal how the sequence dictates interactions and phase behaviour in-vitro and attribute a given function in-cell. This will shed light on specificity determinants of interaction and function for such highly charged IDPs.
Fields of science (EuroSciVoc)
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CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions
MAIN PROGRAMME
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H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
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Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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.
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 - Marie Skłodowska-Curie Individual Fellowships (IF)
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Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) H2020-MSCA-IF-2019
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8006 Zurich
Switzerland
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