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Regulation of DNA topology

Regulation of DNA topology

DEPARTMENT

Integrated structural biology

TEAM LEADERS

Valerie LAMOUR

Marc RUFF

Our research group focuses on the molecular mechanisms governing nucleic acid transport, processing and topological changes of chromatin DNA. Our present targets are nucleoprotein complexes involved in retroviral DNA integration and eukaryotic DNA topoisomerases. We integrate structural data from high resolution (X-ray crystallography), medium resolution (CryoEM) and low resolution (cell imaging) with in vitro and in cellulo functional data.
The main focus of Marc Ruff is to understand the molecular processes performed by the HIV pre-integration complexes (PIC). The aim is to provide a four dimensional view of the PIC, from reverse transcription until integration. A second component of the project focuses on drug design aspects to optimize protein-protein interaction and conformational inhibitors.
Valérie Lamour’s project is aiming at the functional and structural studies of DNA topoisomerase cellular complexes targeted by therapeutic compounds used in cancer and anti-bacterial therapies. The main goal of this study is to identify and study the structure/function of Topoisomerase-associated complexes targeted by drugs through a combination of functional and structural approaches.

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News

Two Researchers Honored by the French Academy of Sciences!

On June 17, 2025, to mark the 20th anniversary of the Grandes Avancées Françaises en Biologie, the French Academy of Sciences welcomed researchers and…

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Publications

Integrated structural biology