Project description
Encapsulin nanospheres as novel electron microscopy gene reporters
Encapsulins are small bacterial proteins that automatically assemble into nanospheres where chemical reactions run without toxic effects on cells. Nanospheres of different structure, diameter and functionalisations can be created within living cells via genetic programming. The encapsulation of metal-binding cargo proteins inside the nanospheres creates gene reporters for electron microscopy (EM) with robust and spatially precise contrast for applications in mammalian cells. The EU-funded EMcapsulins project will create the first set of multiplexed genetic reporters for EM to study structural brain circuit diagrams (connectomes) in order to obtain crucial information on the neuronal type and activation history. These modular encapsulated reporters will deliver the bridging technology between time-resolved light microscopy measurements of neuronal activation dynamics and structural EM connectomics data.
Objective
The biological engineering project EMcapsulins will create the first suite of multiplexed genetic reporters for electron microscopy (EM) to augment today’s merely structural brain circuit diagrams (connectomes) with crucial information on neuronal type and activation history.
My team will generate this new toolbox based on genetically encoded nanocompartments of the prokaryotic ‘encapsulin’ family that we have recently shown to enable genetically controlled compartmentalization of multicomponent processes in mammalian cells.
By encapsulating metal-organizing cargo proteins in the lumen of the semi-permeable encapsulin nanospheres, they serve as fully genetic EM gene reporters (EMcapsulins) that provide robust and spatially precise contrast by conventional EM in mammalian cells.
To enable geometric multiplexing in EM in analogy to multi-color light microscopy, we will explore the large geometrical feature space of EMcapsulins to establish three core Functionalities:
① different shell structures and diameters,
② modular and tunable shell functionalizations, and
③ multiplexed and triggered cargo loading.
We will combine these Functionalities to produce geometrically multiplexed EMcapsulin markers of neuronal identity in serial EM (Application ❶).
We will also engineer EMcapsulin reporters for activity-dependent gene expression, calcium signaling, and synaptic activity that can ‘write’ geometrically encoded records of neuronal activation history into EM connectomics data (Application ❷).
These ‘multi-color’ and modular EMcapsulin markers and reporters deliver the missing bridging technology between time-resolved light microscopy measurements of neuronal activation dynamics and structural EM connectomics data.
EMcapsulin technology will convert structural to functional EM connectomes to enable a systematic analysis of how brains write molecular signaling dynamics into structural patterns to store information for later retrieval.
Fields of science (EuroSciVoc)
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.
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.
- humanities history and archaeology history
- natural sciences chemical sciences inorganic chemistry alkaline earth metals
- natural sciences biological sciences biochemistry biomolecules proteins
- natural sciences physical sciences optics microscopy
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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.1.1. - EXCELLENT SCIENCE - European Research Council (ERC)
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Topic(s)
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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
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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.
ERC-COG - Consolidator Grant
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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) ERC-2019-COG
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80333 Muenchen
Germany
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