https://joliot.cea.fr/drf/joliot/en/Pages/news/Science/2024/DNA-recombination-lock.aspx Website of the Frédéric-Joliot Institute of Life Sciences which includes 4 departments: I2BC, DMTS, NeuroSpin and Service hospitalier Frédéric Joliot (SHFJ). The teams are mainly located at the CEA Paris-Saclay center and at the Orsay hospital. en-US https://www.cea.fr/Style%20Library/Themes/drf/instituts/images/logo-cea-joliot-2023.png https://joliot.cea.fr/drf/joliot/en https://www.cea.fr/drf/joliot/en/Pages/news/Science/2026/Regulation-Fe–S-cluster-biosynthesis-elucidated.aspx A team from I2BC has uncovered the key steps governing the assembly and regulation of iron–sulfur cluster biosynthesis, essential metallic cofactors involved in numerous biological functions. Defects in this process lead to pathologies such as Friedreich’s ataxia. These studies represent major advances toward the development of future therapies. Cellular mechanisms ; Molecular mechanisms ; Diseases SBIGEM Scientific result Fri, 16 Jan 2026 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Reconstruction-TEP-regularisation-Plug-and-Play-convergente.aspx A team of researchers from BioMaps (SHFJ) is proposing a new reconstruction method for PET imaging that combines optimization algorithms with deep neural networks. Their “plug-and-play” regularization approach ensures improved image quality thanks to PET-specific reconstruction learning, while guaranteeing stability and robustness—two critical aspects in the use of AI-based medical techniques. Positron Emission Tomography ; Artificial intelligence Researchers SHFJ Scientific result Tue, 16 Dec 2025 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Protection-telomeres-fusions-chromosomiques.aspx Researchers from CEA-Jacob and the Genome Integrity team at I2BC, in collaboration with Gustave Roussy and the Institut Pasteur, demonstrate that the Rap1 protein prevents the translocation of the Ku protein— a major factor in double-strand break repair — thereby avoiding deleterious fusions between chromosomes. Structural biology Researchers SB2SM Scientific result microscopie électronique; Mon, 17 Nov 2025 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Effet-qualite-lumiere-sur-photosynthese.aspx Une étude menée par une équipe de l'I2BC montre que la surexcitation du photosystème II est responsable de la faible valeur de qL, un paramètre de fluorescence, chez des mutants d’Arabidopsis thaliana incapables de réaliser des « transitions d’état ». Photosynthesis ; Molecular mechanisms ; Cell and molecular imaging Researchers SB2SM Scientific result ; Article Fri, 26 Sep 2025 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Mitose-KIF2C.aspx A study led by the I2BC shows that the formation of condensates of the enzyme KIF2C enables the concentration of two other proteins, PLK1 and phosphorylated BRCA2, on kinetochore microtubules during mitosis. This would serve to control chromosome alignment on the spindle and contribute to their stability. DNA ; Structural biology ; Cancer Researchers SB2SM Scientific result Mon, 08 Sep 2025 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Tolerance-opioid-PET.aspx A study combining PET imaging and pharmacology, conducted by researchers at BioMaps (SHFJ), suggests that decreased availability of opioid receptors and altered neuronal energy metabolism constitute molecular signatures of opioid tolerance. These observations, made in an animal model, could help improve understanding and treatment of opioid dependence. Positron Emission Tomography ; Molecular mechanisms Researchers SHFJ Scientific result ; Article opiate;preclinical model; Wed, 06 Aug 2025 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Sequence-desordonnee-Rad52-assemblage-Rad51.aspx En utilisant Saccharomyces cerevisiae comme modèle, des chercheurs des instituts CEA-Jacob et CEA-Joliot, et de l’Institut Curie, avec leurs partenaires du synchrotron SOLEIL, ont révélé comment la protéine Rad52 agit comme un chaperon pour guider et stabiliser l’assemblage de Rad51, une étape clé de la recombinaison homologue.​ Structural biology ; Cellular mechanisms ; Molecular mechanisms Researchers SB2SM Scientific result Mon, 28 Jul 2025 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Drug-candidate-for-treatment-neonatal-encephalopathy.aspx Researchers from the SPI (DMTS) and the Women & Infants Hospital in Providence have laid the molecular basis for the neuroprotection of a purine derivative in a preclinical model of neonatal hypoxic-ischemic encephalopathy (HIE). The promising results support the development of this drug candidate to treat HIE in neonates. Pharmacology ; Brain ; Molecular mechanisms ; Diseases SPI Scientific result animal models;preclinic; Thu, 26 Jun 2025 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Interactions-of-alpha-synuclein-with-polyethylene-nanoplastics.aspx A team from I2BC, in collaboration with the NIMBE (CEA-Iramis), is unveiling the nature of the interactions of human alpha-synuclein (hαSn) with polyethylene nanoplastics, using molecular dynamics simulations and experimental methods. Nanotoxicology ; Simulation ＆ modelling ; Structural biology Iramis Scientific result Tue, 27 May 2025 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/interfaces-proteine-ARN.aspx Une équipe de l’I2BC a mené une étude prédictive de la structure des interfaces d’interaction dans les complexes protéine - ARN : bien que de nombreux aspects de ces interfaces soient largement conservés au cours de l’évolution, une grande versatilité existe dans les contacts polaires entre les molécules. Structural biology Researchers SB2SM Scientific result Tue, 20 May 2025 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Troubles-psychiatriques-quelle-IA-pour-analyser-IRM.aspx ​​Une étude comparative menée par des chercheurs de l’UMR BAOBAB/NeuroSpin en collaboration avec le LTCI (Télécom Paris) explique pourquoi l’apprentissage profond est plus performant que l’apprentissage automatique standard en neuroimagerie et souligne le potentiel de l’apprentissage par transfert.​ MRI ; Artificial intelligence Scientific result ; Article Thu, 27 Feb 2025 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2025/Next-generation-sequencing-chess-game.aspx A team from I2BC has proposed a thought experiment -the Next Generation Sequencing chess problem-, which treats sequencing data as a superimposed image of several independent chess games. A more realistic approach to the dynamics of cellular processes within each cell, revealing the limits of NGS approaches to temporal analysis. Bioinformatic ; DNA ; Molecular mechanisms ; Simulation ＆ modelling SBIGEM Scientific result Mon, 17 Feb 2025 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Immunotherapie-structure-HER2-trastuzumab-pertuzumab.aspx Des chercheurs de l’I2BC, en collaboration avec Sanofi, l’IMPMC et l’Institut Pasteur, ont modélisé la structure du complexe associant le récepteur membranaire HER2 avec deux fragments de liaison (Fab) de deux anticorps thérapeutiques dirigés contre cette cible, le trastuzumab et le pertuzumab. Structural biology ; Microscope Researchers SB2SM Scientific result Fri, 08 Nov 2024 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/PET-image-reconstruction-deep-learning-clearmind-detector.aspx Three DES and DRF laboratories have developed an innovative Machine Learning algorithm to improve the reconstruction of PET images acquired as part of the ClearMind project, a technology based on the detection of gamma photons by a monolithic lead tungstate crystal detector. A step towards more accurate PET imaging Positron Emission Tomography ; Methodologies for life sciences ; Artificial intelligence Irfu Scientific result Mon, 07 Oct 2024 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Structure-transmembrane-region-SARS-CoV-2-nsp3-protein.aspx An I2BC team has revealed the structure of the C-terminal transmembrane region of the SARS-CoV-2 protein nsp3, essential for virus replication. This region self-assembles into hexamers that form molecular pores on the surface of double-membrane vesicles, the sites of viral genome replication. Nsp3 therefore appears to be a promising therapeutic target. Structural biology ; Virus SB2SM Scientific result Thu, 08 Aug 2024 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Nucleosome-positioning-yeast-genome.aspx A team from I2BC has studied the positioning of nucleosomes in the yeast S cerevisiae genome, using an original mathematical method to analyze next-generation sequencing data. This mapping highlights the role of chromatin remodeling complexes in nucleosome organization. DNA ; Large-scale biology SBIGEM Scientific result Fri, 28 Jun 2024 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/DNA-recombination-lock.aspx Teams from I2BC, Institut Curie and IRB shed light on how the human nuclease MRN works. Structural predictions obtained with AlphaFold2 and confirmed by in vitro and in vivo experiments show that the phosphorylated Sae2/CtIP protein forms a network of interactions with MRN that favours the removal of its autoinhibition. Structural biology ; DNA ; Molecular mechanisms ; Artificial intelligence Researchers SB2SM Scientific result Tue, 25 Jun 2024 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/HROB-MCM8-MCM9.aspx Researchers from the AMIG team (I2BC department), in collaboration with the IRB (Switzerland), have modeled the interaction between HROB and the helicases MCM8-MCM9, some mutations of which predispose individuals to infertility or cancer. They demonstrate that HROB promotes the catalytic activity of the MCM8-MCM9 complex but does not play a role in its recruitment or stability. Structural biology ; Molecular mechanisms Researchers SB2SM Scientific result ; Article AlphaFold;AlphaFold2; Wed, 22 May 2024 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Epigenetics-CAF-1.aspx A team from the I2BC, in collaboration with the Institut Curie and Soleil, has shown that the CAF-1 protein combines flexible regions and rigid modules in its spatial organisation to deposit histones on DNA and effectively couple this process to DNA synthesis. Epigenetics ; Structural biology Researchers SB2SM Scientific result ; Article Tue, 26 Mar 2024 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Neurodevelopmental-model-prediction-psychotic-transition.aspx A NeuroSpin team has built a predictive model for the onset of psychosis using a combination of supervised learning analyses and a model of neuroanatomical age, based on neuroimaging data from healthy subjects and those at risk of psychotic transition. MRI ; Diseases ; Artificial intelligence ; Brain Neurospin Scientific result Thu, 21 Mar 2024 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/Cryo-EM-ring-BRCA2-HSF2BP.aspx A collaboration involving the I2BC has modelled the structure of the complex between HSF2BP and a fragment of BRCA2, which is essential for DNA repair by homologous recombination. The researchers propose a mechanism for regulating the unexpected ring-like assembly of this complex. Structural biology Researchers SB2SM Scientific result ; Article Thu, 08 Feb 2024 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2024/proteins-proteins-interactions-AlphaFold2.aspx In an article published in Nature Communications, researchers from the I2BC show that applying a fragmentation strategy to the protein partners of assemblies depending on intrinsically disordered regions very significantly improves AlphaFold2's prediction capacity. Structural biology ; Artificial intelligence Researchers SB2SM Scientific result Mon, 29 Jan 2024 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Rapid-genome-replication-role-of-Rif1-protein.aspx I2BC researchers show that the Rif1 protein restrains the replication program and the recruitment of replication initiation factors during early embryonic divisions in X laevis. A step towards elucidating the molecular mechanisms involved in diseases resulting from Rif1 mutations in humans Molecular mechanisms ; DNA SBIGEM Scientific result ; Article Thu, 21 Dec 2023 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/phytic-acid-DNA-repair.aspx In an article published in the journal Nucleic Acids Research, scientists from the I2BC, lPBS and the Institute for Structural and Chemical Biology (University of Leicester, UK) demonstrate how phytic acid, a product of cellular metabolism, stabilises the assembly of a complex enabling the repair of DNA breaks in humans. DNA ; Structural biology Researchers SB2SM Scientific result ; Article Mon, 04 Dec 2023 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Multiplier-chimeres-mieux-comprendre-interactions-inhibiteur-cible-proteique.aspx En substituant des segments d’hélice alpha​ par des segments d’oligo-urées dans un peptide inhibiteur d’ASF1, lui conférant ainsi une résistance accrue aux protéases, des chercheurs de l’I2BC en collaboration avec l’IECB explorent les modes de liaison de ces chimères peptide-urée à leur cible. Molecular mechanisms ; Structural biology Researchers SB2SM Scientific result ; Article Tue, 12 Sep 2023 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Events/2023/Kick-off-meeting-MIND.aspx ​​​Le 07 septembre, l'équipe MIND organisait son kick-off meeting, symbolisant la volonté commune de sestutell es, CEA et Inria, de consolider et de créer des synergies en intelligence artificielle et machine learning pour les neurosciences. MRI ; Artificial intelligence ; Brain Researchers ; Institutions Neurospin Inauguration ; Colloquium deep learning;Deep Neural Network;réseaux de neurones; Mon, 11 Sep 2023 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2023/Kick-off-meeting-MIND.aspx On 07 September, the young MIND team organised its kick-off meeting, symbolising the shared desire of its two supervisory administrations, the CEA and Inria, to consolidate and create synergies in artificial intelligence and machine learning for neuroscience. MRI ; Artificial intelligence ; Brain Researchers ; Institutions Neurospin Inauguration ; Colloquium deep learning;Deep Neural Network; Mon, 11 Sep 2023 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/IA-IRM-haut-champ-multiples-pistes-equipe-MIND.aspx Brain ; MRI ; Artificial intelligence Researchers Neurospin Scientific result ; Patent Wed, 30 Aug 2023 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/New-role-Mediator-transcription-chromatin-organization.aspx A team from I2BC has shown that the Mediator of transcription from the yeast S.cerevisiae physically interacts with the chromatin remodeling complex, and that by co-localizing with this complex on DNA promoter regions, it contributes to chromatin organization favorable to transcription initiation. Health ＆ life sciences ; DNA ; Molecular mechanisms SBIGEM Scientific result Mon, 24 Jul 2023 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/proteines-dispersion-microplastiques-dans-eau.aspx Des chercheurs de l’I2BC ont contribué à une étude menée par l’Iramis qui dévoile le rôle des protéines dans la dispersion des microplastiques dans l’eau. Leurs résultats permettent d’imaginer de nouvelles stratégies low tech pour débarrasser l’eau de cette pollution. Impacts on living (organisms) ; Molecular mechanisms ; Remediation Researchers SB2SM Scientific result surfactant;polypropylène;polyéthylène; Wed, 12 Jul 2023 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/HTA-toxine-animale-recepteur-angiotensine-II.aspx SIMoS researchers have identified and characterised an animal toxin (A-CTX-Mila) as a ligand for angiotensin II receptors, which are involved in one of the signalling pathways targeted by antihypertensive drugs. A tool of choice for studying the cellular mechanisms controlled by these receptors. Molecular mechanisms ; Diseases Researchers SIMOPRO Scientific result Fri, 16 Jun 2023 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Reparation-ADN-PAXX.aspx An international collaboration led by researchers from I2BC/CEA-Joliot and IPBS (Toulouse) has solved the atomic structure of molecular assemblies involved in the repair of DNA double-strand breaks. The diversity of assemblies involving the PAXX protein identified in this study highlights the great flexibility of the repair machinery, which could reflect its ability to adapt to biological conditions. The results were published in Science Advances. Structural biology ; Molecular mechanisms Researchers SB2SM Scientific result cryoEM;radiocristallographie; Tue, 06 Jun 2023 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/Virus-hepatite-E-AlphaFold.aspx I2BC researchers unveil an atomic model of the hepatitis E virus replication polyprotein obtained with the AlphaFold artificial intelligence program. The model provides a better understanding of how this RNA virus multiplies its genome in infected cells. Structural biology ; Simulation ＆ modelling ; Artificial intelligence Researchers SB2SM Scientific result AlphaFold2;RNA virus;in vitro translation; Wed, 08 Feb 2023 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2023/BAF-numerical-simulation-phosphorylation.aspx Using molecular dynamics simulation and NMR studies, I2BC researchers detail the restriction mechanisms of BAF protein dynamics due to its phosphorylation. Molecular mechanisms ; Structural biology ; Simulation ＆ modelling Researchers SB2SM Scientific result Mon, 16 Jan 2023 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Mathematical-model-repair-genome.aspx The protocols applied for in vivo mapping of nuclear processes, at the genome scale and at very high spatial resolution, do not allow for high temporal resolution. A team from the I2BC has therefore demonstrated that such an understanding could be wrong by using a mathematical model. This model can be applied to any process that can be modeled by a transition between two states. DNA ; Cellular mechanisms Researchers IBITECS Scientific result XR-seq;réparation de l’ADN;NER; Tue, 13 Dec 2022 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Mediator-transcription-gene-expression-regulation-DNA-repair.aspx An I2BC team has analyzed, at the genome scale of the yeast S.cerevisiae, the functional interactions between the Mediator of gene transcription and DNA repair proteins, reinforcing the idea that these two fundamental cellular processes are closely linked. Molecular mechanisms ; Cellular mechanisms ; DNA SBIGEM Scientific result Mon, 26 Sep 2022 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Predicting-cognitives-activities-fMRI-maps.aspx A NeuroSpin team succeeded in decoding a large set of human mental processes by training neural networks to predict cognitive labels from a cognitive atlas and by leveraging the data set of NeuroVault, a web-based database for collecting and sharing statistical maps of the human brain. Brain ; Cognition ; MRI ; Artificial intelligence Neurospin Scientific result Thu, 30 Jun 2022 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Intrahepatic-cholestasis-biochemistry-structure-ATP8B1.aspx A collaborative study involving an I2BC team unveils the mechanism of autoinhibition of the human flippase ATP8B1, as well as its regulation by lipids and phosphorylation. The study provides a better understanding of the impact of flippase mutations responsible for intrahepatic cholestasis on its enzymatic activity. Molecular mechanisms ; Structural biology Researchers SB2SM Scientific result ATP;hydrolyse;protéine membranaire;modifications post-traductionnelles;expression hétérologue;membranes;cryo-EM; Thu, 09 Jun 2022 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Press/2022/The-New-York-Times-geometrie-NeuroSpin.aspx In an article in the New York Times, Stanislas Dehaene (NeuroSpin director) and Mathias Sablé-Meyer (PhD student) discuss recent results obtained in collaboration with the Collège de France, the CNRS and the University of Paris 8 that show that humans have a universal capacity to understand abstract geometric concepts. Cognition ; Artificial intelligence Researchers ; general public Neurospin réseaux neuronaux;modélisation;psychologie exoérimentale;réseaux convolutionnels;cognition comparée; Thu, 31 Mar 2022 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/IA-predict-like-brain-gated-recurrence.aspx Two researchers of UNICOG/NeuroSpin show that a gated recurrence model of neural networks would allow to make efficient and simple predictions, like our brain, in different environments. In addition to being biologically plausible, this model would be generalizable. Brain ; Artificial intelligence ; Cognition Researchers Neurospin Scientific result sciences cognitives;Bayes; Thu, 17 Feb 2022 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/structure-nanotubes-lanreotide.aspx ​Thanks to recent developments in cryo-electron microscopy, a study led by a team from the I2BC reveals, at the atomic scale, the unsuspected structural complexity of lanreotide nanotubes, a drug used in the treatment of acromegaly and some neuro-endocrine cancers. Structural biology Researchers SB2SM Scientific result Thu, 20 Jan 2022 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2022/Modeling-pairing-crossover-meiosis.aspx In a study conducted by a team from the Institut Curie, researchers from the CEA-Joliot (B3S/I2BC department) have modeled in silico protein-protein interactions and thus contributed to establish at the molecular level the mechanisms that coordinate the pairing and recombination of homologous chromosomes during meiosis. Simulation ＆ modelling ; Structural biology ; Molecular mechanisms Researchers SB2SM Article ; Scientific result recombinaison homologue;AlphaFold;crossing-over;InterEvDock3; Thu, 13 Jan 2022 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/CNN-accounting-for-emergence-of-specific-region-underlying-orthographic-coding.aspx ​Researchers from NeuroSpin designed, trained and tested biologically plausible artificial deep neural networks to identify pictures and written words. They show that these may suffice to account for emergence during reading acquisition of the visual word form area, a specific region underlying orthographic coding. Cognition ; Artificial intelligence Researchers Neurospin Scientific result Tue, 30 Nov 2021 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/senescence_biomarkers_chromatin.aspx Researchers from the DMTS and I2BC depatments of the Joliot Institute's " identify three potential new biomarkers of senescent cells containing persistent DNA damage. Molecular mechanisms Researchers SBIGEM Scientific result Wed, 17 Nov 2021 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2021/High-performance-computing-molecular-modelisation.aspx A project at the interface between quantum chemistry and molecular dynamics for the study of complex molecular assemblies, led by Michel Masella (Joliot) and Luigi Genovese (IRIG), makes it possible, for applications in biology/health, to take full advantage of the new supercomputers of the Public Procurement of Innovations for High-Performance Computing (PPI4HPC, H2020) project hosted at the Très Grand Centre de Calcul (TGCC) of the CEA-Bruyères-le-Châtel. Computing ; Simulation ＆ modelling ; Supercomputers ; Structural biology News ; Article Tue, 14 Sep 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/BRCA2-HFS2BP-meiosis.aspx By solving the three-dimensional structure of a fragment of the BRCA2-HSF2BP complex, a collaboration involving teams from I2BC and ERASMUS MC identifies the precise BRCA2 motif that causes the very high affinity between the two partners and shows that, in vivo, this complex has no function in the recruitment of Rad51 to meiotic sites of homologous recombination. Structural biology Researchers SB2SM Article ; Scientific result RMN;radiocristallographie; Mon, 13 Sep 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Automatic-recognition-brain-lines.aspx Researchers at NeuroSpin (CEA-Joliot) propose to automate the classification and recognition of folding patterns on the surface of the cortex that may be related to the occurrence of psychiatric diseases or cognitive disorders using artificial intelligence algorithms. A path towards deciphering the "lines" of the brain. Brain ; Artificial intelligence Scientific result Mon, 23 Aug 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Plants-dissipation-exces-energy.aspx In a study published in JBC, a team from I2BC/CEA-Joliot, in collaboration with the Beijing Botanical Institute (China), describes for the first time an intermediate state of the light-harvesting antenna of higher plants that provides a better understanding of the changes that take place at the molecular level during the activation of a plant's photoprotection mechanism. Photosynthesis ; Molecular mechanisms Researchers SB2SM Scientific result Raman analyzer; Mon, 05 Jul 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Small-RNA-regulates-photoprotection-cyanobacteria.aspx A team of the I2BC (LMB/SB2SM), in collaboration with the Institute of Biology (Freiburg University), discovered a posttranscriptional regulatory mechanism linking the expression of the cyanobacterial Orange Carotenoid Protein, related to photoprotection, directly and in an inverse fashion, to the synthesis of the light collector complexes (phycobilisomes), via a 3’ end-derived small RNA. Photosynthesis ; Microalgae ; Molecular mechanisms Scientific result Wed, 23 Jun 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/InterEvDock3.aspx Researchers at I2BC/CEA-Joliot, in collaboration with the RPBS platform, have developed the third version of their InterEvDock server for structural modelling of protein-protein interactions. The server integrates new algorithms for exploiting sequence evolution information. Structural biology Researchers SB2SM Scientific result HADDOCK;FRODOCK;coMSAs;CAPRI; Mon, 21 Jun 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/accumulation-mutations-microfluidique.aspx Teams from CEA-Iramis and CEA-Joliot (team "Genome transcriptional regulation /I2BC) have joined forces to develop and validate an innovative microfluidic-based system that automatizes cell culture over many generations. It enables with considerable time savings large-scale experiments to be carried out, which are essential for understanding the cellular mechanisms involved in DNA mutation events. DNA ; Cellular mechanisms Researchers Iramis Scientific result Fri, 11 Jun 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Mlh1-Mlh3.aspx Researchers from I2BC/CEA-Joliot in collaboration with teams from Institut Curie and IRCM/CEA-Jacob, lay the molecular basis to explain the dual role of the Mlh1-Mlh3 complex in DNA mismatch repair and, quite uniquely, in one of the key steps of genetic mixing during meiosis. Structural biology Researchers SB2SM Scientific result cristallography;repair;recombination; Mon, 07 Jun 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/phosphorylation-BAF-interaction.aspx ​A study by researchers from I2BC department shows in vitro the effect of mitotic phosphorylation of the BAF protein on its structure and its interactions with DNA and lamina and unveils consequences on genome organization and on mechanisms responsible for progeroid syndromes. Molecular mechanisms ; DNA ; Structural biology Researchers SB2SM Scientific result NMR;radiocristallography; Mon, 29 Mar 2021 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Foldamer-inhibitor-ASF1.aspx I2BC researchers, in collaboration with the European Institute of Chemistry and Biology (University of Bordeaux, CNRS), have developed a chimeric peptide/foldamer molecule that is resistant to proteolysis and inhibits ASF1, a potential target for anticancer treatment. The resolution of the structure of this chimera in interaction with its target, the first of its kind, reveals an unsuspected plasticity of the urea-based backbone that hugs the surface of ASF1. Structural biology ; Molecular mechanisms ; Epigenetics ; Cancer Researchers SB2SM Scientific result NMR;radiocristallography; Fri, 19 Mar 2021 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Functional-characterization-PcATP2-essential-Plasmodium-flippase.aspx I2BC researchers, in collaboration with the Autonomous University of Barcelona, have provided the first studies of the function and structural organization of a flippase encoded by a parasite responsible for malaria, a first step towards understanding the essential physiological function of this transporter and its potential use as an antimalarial target. Structural biology ; Infectious diseases Scientific result Wed, 17 Mar 2021 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/Sarcolipin.aspx By combining molecular dynamics and in vitro experiments, researchers at the LPSM (I2BC) have revealed the mode of action of sarcolipin in regulating the activity of SERCA1a, responsible for muscle relaxation. Molecular mechanisms ; Fundamental Research Researchers Saclay Scientific result Fri, 05 Mar 2021 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2021/E340-SERCA-communication.aspx A study led by Oxford University researchers and involving researchers from the Institut Joliot (I2BC) and the University of Århus reveals the crucial role of the E340 residue in the inter-domain communication of the calcium transporter SERCA. Molecular mechanisms Researchers SB2SM Scientific result fluorescence;mutagenesis;tryptophan; Fri, 15 Jan 2021 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Depression-gut-microbiota.aspx A study led by the Institut Pasteur and involving CEA-Joliot has shown, in a mouse model, that a modification of the intestinal microbiota caused by chronic stress is accompanied by modifications of the metabolome which induce a defect in the signaling pathway for endogenous cannabinoids in the hippocampus, which may explain the mood disorders observed. Metabolomics ; Molecular mechanisms Researchers SPI Scientific result Microbiology;neural circuits; Tue, 15 Dec 2020 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Facebook-challenge-IA-CEA-researchers-2d.aspx In the field of artificial intelligence, international competition is tough. So when researchers from CEA-Joliot and Irfu challenge start-ups and other companies specializing in AI, we cheer them on. Here’s a success story from the field of MRI reconstruction. MRI ; Artificial intelligence Researchers Neurospin Success Fri, 11 Dec 2020 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Mambaquaretin-theranostic.aspx In pursuing their work on mambaquaretin, SIMoS researchers conducted a collaborative study confirming the therapeutic potential of the toxin and paving the way for its use as a diagnostic tool. Diagnosis and innovative treatment ; Molecular mechanisms ; Cellular mechanisms SIMOPRO Scientific result PET Scan;PK/PD; Tue, 10 Nov 2020 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/DUB-virale-ubiquitin.aspx A study led by a team from the Institut Joliot (I2BC/B3S) reveals an unusual mode of interaction between a viral deubiquitinase and a ubiquitin, which appears to be optimized to finely control virus replication. Molecular mechanisms SB2SM Scientific result crystal structure;deubiquitinilation;viral protease; Tue, 08 Sep 2020 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2020/Lamines-Progeria-Structural-Biology.aspx A team from the I2BC publishes in FEBS Journal an exhaustive review of the various mutations affecting the structure of type A lamins, proteins that make up the envelope of the cell nucleus (nuclear lamina), which lead to premature aging in people with the disease (Progeria). Structural biology ; Diseases Mon, 24 Aug 2020 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Deep-learning-MRI-Standard-networks-comparison.aspx Using public MRI data sets from the knee and brain, researchers from NeuroSpin and Cosmostat (CEA-Irfu) have written a consistent benchmark of several deep neural networks used for image reconstruction with significantly reduced acquisition time. Artificial intelligence ; MRI ; Brain Neurospin Scientific result Deep Neural Network;fastMRI;3D reconstruction;compressed-sensing MRI; Thu, 04 Jun 2020 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Dynamics-PTOX-thylakoides.aspx A collaboration led by I2BC researchers presents, in the Journal of Experimental Botany, a body of evidence for a dynamic association of the PTOX protein with thylakoid membranes, dependent on proton motive force. Bioenergy ; Molecular mechanisms SB2SM Scientific result photosystem;ATP; Sat, 02 May 2020 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/BRCA2-breast-cancer.aspx ​In a study conducted by a team from the Institut Curie, I2BC researchers have used their NMR know-how to study the phosphorylation of BRCA2 and have thus contributed to revealing a mechanism potentially at the origin of chromosomal aberrations observed in breast BRCA2-mutated tumors. Molecular mechanisms ; Cancer SB2SM Scientific result homologous recombination;Rad51;kinase; Mon, 27 Apr 2020 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2020/Mobile-laboratory-study-genetic-material-extinct-species.aspx A collaboration between researchers from I2BC@Saclay, the french Muséum National d'Histoire Naturelle and owners of prehistoric sites shows the possibility of using a mobile laboratory to quickly identify DNA of archaeological specimens. Evolution ; DNA Scientific result Wed, 08 Apr 2020 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Lanreotide-nanoscrolls.aspx By studying the self-assembly of a hormone-derived peptide in the presence of lipid membranes, a team of the SB2SM (Joliot Institute / I2BC) in collaboration with the University of Rennes 1 and Ipsen biopharmaceutical group, shows how the interactions electrostatic type modify the structures of the assemblies formed by each of these molecules alone in solution. Molecular mechanisms ; Cell and molecular imaging SB2SM Scientific result Mon, 23 Sep 2019 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Glucocorticoids-better-evaluation-effect-cancers.aspx Senescence specialists (SBIGEM), in collaboration with the SCBM and the CNRGH (Jacob Institute), show that glucocorticoids can delay or even short-circuit it and disrupt its function as a tumor suppressor. Cellular mechanisms ; Molecular mechanisms ; Cancer Fontenay-aux-Roses Scientific result MEK/ERK;oncogenesis;Senescence; Mon, 09 Sep 2019 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Friedreich-Ataxia-reliable-in-vitro-model-function-frataxin.aspx By improving the in vitro reconstitution of the iron-sulfur clusters biosynthesis machinery, a team from SBIGEM (CEA-Joliot / I2BC), with its French, German and Spanish collaborators, clarifies the function of frataxin, a protein involved in Friedreich’s ataxia. Molecular mechanisms SBIGEM Scientific result Frataxin;Mössbauer;circular dichroism; Fri, 06 Sep 2019 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Transcription-and-DNA-repair.aspx Recent work by SBIGeM (I2BC@Saclay) highlights how two essential components of DNA transcription into RNA coordinate to recruit the Rad2/XPG DNA repair protein, thus linking these two fundamental cellular processes. Molecular mechanisms ; DNA Scientific result Thu, 22 Aug 2019 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/AI-rapid-acquisition-MRI-clinical-images-large-organs.aspx A team of NeuroSpin, in collaboration with Hôpital Henri Mondor (Créteil), has developed, by machine learning, a method called SmartPulse, which allows, for large organs, the acquisition of high field (3T) clinical quality images, without prior calibration. MRI ; Artificial intelligence ; Medical imaging Scientific result Fri, 05 Jul 2019 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2019/Drs2-Cdc50-CryoEM-Structure-Nature.aspx Researchers from I2BC@Saclay, the University of Aarhus and the Max Planck Institute of Biophysics in Frankfurt reveals the first cryo-EM high-resolution structures of one of the P4-ATPases. Study has been published in Nature. It give a better insight towards the understanding of the transport mechanisms of membrane lipids. A lipid pathway through the protein membrane domain is suggested. Structural biology ; Molecular mechanisms Saclay Press release ; Scientific result lipid asymetry;P4-ATPase;membrane lipid translocation; Thu, 27 Jun 2019 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2019/Genopole-structural-biology-platforms-joins-FRISBI.aspx The French National Infrastructure of Integrated Structural Biology (FRISBI) is now integratinf Genopole's structural biology platform into its Paris-Sud node. Structural biology Researchers Saclay Academic partnerships i;microscope à force atomique;plateforme; Fri, 10 May 2019 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/New-function-discovered-protein-Rad52-serious-therapeutic-target-breast-cancer.aspx Rad52 has garnered great attention lately as a promising target in the battle against certain types of breast cancer. A team from IRCM, in partnership with researchers from the Frédéric-Joliot and Gustave Roussy Institutes, has shed new light on this protein. Stress response ; Molecular mechanisms Jacob Scientific result Rad51 filament;budding yeast;Srs2; Fri, 12 Oct 2018 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/DNA-repair-zoom-first-steps.aspx A research team from the SB2SM (I2BC@Saclay), in collaboration with the CNRS, SOLEIL , Universities of Paris-Sud, Aix-Marseille and Paul Sabatier - Toulouse III and Gustave Roussy, has resolved structures of two complexes involved in radiation-induced DNA damages. These results were published in Nature Structural & Molecular Biology on October, the 5th. DNA ; Structural biology ; Molecular mechanisms SB2SM Press release Mon, 08 Oct 2018 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/EEG-algorithm-diagnosis-states-consciousness.aspx An international collaboration, led by the Institut du Cerveau et de la Moelle épinière – ICM (Brain & Spine Institute) and involving researchers from NeuroSpin, offers a new electroencephalogram (EEG) tool that helps the diagnosis of disorders of consciousness. Unlike other tools developed so far and dedicated to a few expert centers, “DoC-Forest” would be accessible to most of the hospitals worldwide. Brain ; Medical imaging ; Artificial intelligence ; Diagnosis Neurospin Scientific result EEG;biomarker;disorders of consciousness;machine learning; Fri, 05 Oct 2018 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/relationship-variants-BRCA1-cancer.aspx Research Teams from the Curie Institute, the Gustave Roussy Institute, as well as the biophysics teams from the Institute of Chemistry of Natural Substances and SB2SM (I2BC@Saclay) met to systematically identify structural defects and BRCA1 proteins encoded by variants of the BRCA1 gene, a gene predisposing to breast and ovarian cancer. Their results make it possible to propose a classification of these variants (neutral versus causal). Cancer ; Structural biology ; DNA Scientific result Fri, 28 Sep 2018 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/myristoylation-decoded.aspx An I2BC Research Team, in collaboration with the ICSN and the Ecole Polytechnique, has mapped for the first time, in man and the model plant Arabidopsis thaliana, the myristoylome, namely the whole proteins modified with a fatty acid, myristate. This modification is important because it targets these proteins to the membranes and thus contributes to their subcellular compartmentalization. These data represent an important resource, available to the community of biologists. Structural biology News Tue, 26 Jun 2018 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/advance-exchanges-recombination.aspx Collaborative work between the SBIGeM (I2BC@Saclay) and the Marseille Cancer Research Center, published in Molecular Cell, illuminates the mechanistic basis and genetic control of homologous recombination, a mechanism for repairing DNA breaks responsible for chromosome exchange during meiosis. However, canonical models do not explain the complexity of meiotic recombination profiles and this study, which reconstructs reaction intermediates, constitutes a major advance in the understanding of this mechanism. DNA ; Genomics News Tue, 15 May 2018 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/ghosts-of-fluorescence.aspx Cell biology uses fluorescent labeling, an essential technique to follow the life of the cell. But fluorescent proteins have their limits, which researchers from IBS and I2BC @ Saclay (SB2SM) are trying to repel. Structural biology ; Proteomics Scientific result Wed, 28 Mar 2018 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2018/biotechnological-approach-new-bioactive-molecules.aspx ​Muriel Gondry's Research Team (I2BC@Saclay / SBIGeM), in collaboration with SIMOPRO and Biomolecules Laboratory of the Sorbonne University's one, produced 200 cyclodipeptides containing non-natural amino acids by luring and diverting the cellular machinery for the synthesis of proteins. This unprecedented approach significantly increases the diversity of these bioactive molecules. Biotechnology ; Structural biology Scientific result Mon, 05 Mar 2018 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Institute/2017/New_MOOC_on_biological_crystallography.aspx Paris-Saclay University is pleased to present the MOOC "Journey to the heart of life with X-rays: crystallography", result of a close collaboration between the Department I2BC @ Saclay (pedagogical director: Marie-Hélène Le Du ), the Sun Synchrotron, the Ecole Polytechnique, the CNRS, and the University Paris Sud. Institutional ; Health ＆ life sciences ; Structural biology News Mon, 18 Sep 2017 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2016/Epigenetics_how_reach_inaccessible_genes.aspx ​Biologists have brought to light the operation of "chromatin remodellers", key enzymes in cells. They have discovered how the genetic material, condensed in the nucleus of the cell, needs to be remodelled so that the cell machinery can access the genes. This work, initiated by IBITECS/SBIGeM, coordinated by researchers from a CEA/CNRS/Université Paris-Sud laboratory, under an international collaborative project with Pennsylvania State University (USA) and Guangzhou University (China), was published in Nature on 4 February 2016.​​ Epigenetics News Wed, 12 Apr 2017 13:23:30 GMT https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2016/Mediator_transcriptional_regulation.aspx ​A genomic study of the role of the Mediator of transcriptional regulation, carried out by a SBIGeM team, shows that this multiprotein complex coordinate the multiple stages of the setting up of the transcriptional machinery in vivo.​​ DNA News Wed, 12 Apr 2017 13:23:19 GMT https://www.cea.fr/drf/joliot/en/Pages/news/Science/2017/A_new_vision_of_the_in_vivo_function_of_the_transcription_mediator.aspx An in vivo, in vitro and in silico study of the Mediator of Transcriptional Regulation has shown how the function of this multiprotein complex is coordinated with another essential component of the transcription machinery, the TFIIB factor, and the architecture of the promoter. This study, led by SBIGeM, was conducted in collaboration with several other Research Teams (CNRS, CEA, INRA). DNA ; Health ＆ life sciences Scientific result Tue, 31 Jan 2017 11:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2015/Hug1_and_RNR.aspx ​A study, coordinated by a SBIGeM team in collaboration with a SB2SM team, allowed to describe the role of the Hug1 protein in regulating the activity of the ribonucleotide reductase complex (RNR). The level of active RNR is controlled during cell cycle and in response to DNA damages. DNA ; Stress response ; Cell division News Mon, 04 May 2015 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2015/How-does-mobile-DNA-sequence-find-target.aspx Certain mobile DNA sequences shape genomes and are maintained over the course of generations. How is this explained? The interaction between two proteins, which is essential for their integration into a specific area of the yeast genome, has been identified. This finding has interesting implications for gene therapy. DNA ; Gene and cell therapy Saclay Scientific result Fri, 01 May 2015 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2015/cyclodipeptide_synthases_elucidated-.aspx Teams of IBITECS and Ecole Polytechnique (Palaiseau) have deciphered the mechanism used by the cyclodipeptide synthases (CDPS) to catalyze the formation of peptide bonds. Structural biology ; Cellular mechanisms News Fri, 01 May 2015 10:00:00 GMT https://www.cea.fr/drf/joliot/en/Pages/ARCHIVES/IBITECS_anglais/News/2013/Lynch-Syndrome-structural-biology-in-the-service-of-diagnostic-support.aspx Researchers at the CEA, CNRS and Université Paris-Sud have presented the first model of the architecture of the MLH1 protein associated with Lynch syndrome, a genetic predisposition to colorectal cancer. This atomic level “image” of MLH1 will lead to better understanding of the genetic processes that cause the disease. Structural biology ; Cancer IBITECS Scientific result Mon, 25 Feb 2013 11:00:00 GMT