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The quantum role of chirality in biology by all-optical experiments.

Project description

Investigating how spin-selective quantum effects affect DNA

Over the past two decades, research has established that chiral molecules (molecules that can’t be superimposed on their mirror image) can selectively influence electron spin, a quantum effect called chiral induced spin selectivity (CISS). This might explain important biological processes, such as why life favours one molecular ‘hand’ over the other. However, most studies on CISS have been conducted in conditions unsuitable for living systems. The ERC-funded CHIROLE project aims to study CISS in environments compatible with life. Researchers will investigate how CISS affects biomolecular interactions, explore its connection to DNA vibrations and develop ways to control it with light. The proposed research could help reveal how quantum physics influences biological functions such as DNA regulation.

Objective

In the past two decades, extensive research has established that electronic transport through chiral molecules is spin selective. This phenomenon is known as chiral induced spin selectivity (CISS).
While a fundamental comprehension of CISS remains elusive, compelling evidence demonstrates that it affects the interaction among chiral molecules through a spin-dependent contribution. As a consequence, its implication in the origin of biological homochirality has been suggested. CISS is an inherently quantum effect that can play a role in various biochemical processes, crucial for biological functions. However, prior investigations of CISS have taken place under conditions incompatible with life, largely preventing to explore its quantum biology implications.

With CHIROLE, I propose a radical shift in the state-of-the-art experimental approach. I aim at investigating CISS by harnessing light as a tool to foster our comprehension of CISS and gain external control on its biological consequences.
My objectives are as follows:
A) Probing the impact of CISS on biomolecular interactions occurring in physiological environments, by advanced optical spectroscopies and tailored magneto-plasmonic nanosensors.
B) Investigating the role of phonons in CISS by nonlinear optics, triggering coherent vibrations in DNA and probing the induced modulation of CISS by integrated spectroscopies.
C) Based on the investigations above, establishing biocompatible methods to dynamically tune the CISS strength with light, by modulating its determining conditions.

The breakthrough of CHIROLE will consist in the shift of the investigation to a fully biocompatible platform, and in the proposed use of light as external knob to control CISS biological implications, with a focus on DNA, and epigenetic regulation as final target.

By linking quantum physics with the biological functions, CHIROLE holds the promise of advancing our understanding of the role of chirality in a quantum biology frame.

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Call for proposal

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(opens in new window) ERC-2024-STG

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Host institution

UNIVERSITA DEGLI STUDI DI ROMA LA SAPIENZA
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.

€ 1 349 544,00
Address
Piazzale Aldo Moro 5
00185 Roma
Italy

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Region
Centro (IT) Lazio Roma
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.

€ 1 349 544,00

Beneficiaries (2)

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