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Physique théorique des systèmes biologiques
(19) Production(s) de l'année 2017
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Vladimir Lorman and the Physics of Unconventional Systems 
Auteur(s): Parmeggiani A.
Conférence invité: Workshop on Physical Virology - ICTP (Trieste, IT, 2017-07-21)
Ref HAL: hal-01940219_v1
Exporter : BibTex | endNote
Résumé: A perspective of Vladimir Lorman's studies in theoretical and interdisciplinary physics
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Chapitre 3: La Complexité du Vivant
Auteur(s): Parmeggiani A.
Chapître d'ouvrage: Étonnant Vivant - Découvertes Et Promesses Du Xxie Siècle, vol. p.133 (2017)
Résumé: Le vivant est encore plus complexe qu’il en a l’air : voyage au bout
de l’ARN non codant 153
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Le cerveau, à la frontière du vivant et de l’esprit
163
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Comment fabriquer un organisme à partir
d’une seule minuscule cellule ?
172
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Comment s’organisent les sociétés animales
179
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Conclusion
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Modeling DNA segregation mechanisms in prokaryotes: the ParABS machinery
Auteur(s): Parmeggiani A.
Conférence invité: Journée Annuelle GDR MifoBio (Montpellier, FR, 2017-12-04)
Résumé: Theoretical modeling of ParABS machinery in prokaryotes
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Modeling DNA segregation mechanisms in prokaryotes: the ParABS machinery
Auteur(s): Parmeggiani A.
Conférence invité: Journées Annuelles du GDR ADN (Millau, FR, 2017-05-11)
Résumé: Theoretical modeling of ParABS segregation complex in bacteria
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Physical modeling of active bacterial DNA segregation
Auteur(s): Walter J.-C.
(Séminaires)
Institute for Theoretical Physics (Leuven, BE), 2017-04-15 |
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Physical modeling of active bacterial DNA segregation
Auteur(s): Walter J.-C.
Conference: Architecture et Dynamique Nucléaire (ADN) (Paris, FR, 2017-03-30)
Texte intégral en Openaccess : 
Ref HAL: hal-01931248_v1
Exporter : BibTex | endNote
Résumé: Efficient bacterial chromosome segregation typically requires the coordinated action of a three-component, fueled by adenosine triphosphate machinery called the partition complex. We present a phenomenological model accounting for the dynamic activity of this system that is also relevant for the physics of catalytic particles in active environments. The model is obtained by coupling simple linear reaction-diffusion equations with a proteophoresis, or “volumetric” chemophoresis, force field that arises from protein-protein interactions and provides a physically viable mechanism for complex translocation. This minimal description captures most known experimental observations: dynamic oscillations of complex components, complex separation and subsequent symmetrical positioning. The predictions of our model are in phenomenological agreement with and provide substantial insight into recent experiments. From a non-linear physics view point, this system explores the active separation of matter at micrometric scales with a dynamical instability between static positioning and travelling wave regimes triggered by the dynamical spontaneous breaking of rotational symmetry.
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Physical modeling of active bacterial DNA segregation
Auteur(s): Walter J.-C.
Conference: International Physics of Living Systems (Paris, Institut Pierre-Gilles de Gennes, FR, 2017-06-29)
Texte intégral en Openaccess :
Ref HAL: hal-01931233_v1
Exporter : BibTex | endNote
Résumé: Efficient bacterial chromosome segregation typically requires the coordinated action of a three-component, fueled by adenosine triphosphate machinery called the partition complex. We present a phenomenological model accounting for the dynamic activity of this system that is also relevant for the physics of catalytic particles in active environments. The model is obtained by coupling simple linear reaction-diffusion equations with a proteophoresis, or “volumetric” chemophoresis, force field that arises from protein-protein interactions and provides a physically viable mechanism for complex translocation. This minimal description captures most known experimental observations: dynamic oscillations of complex components, complex separation and subsequent symmetrical positioning. The predictions of our model are in phenomenological agreement with and provide substantial insight into recent experiments. From a non-linear physics view point, this system explores the active separation of matter at micrometric scales with a dynamical instability between static positioning and travelling wave regimes triggered by the dynamical spontaneous breaking of rotational symmetry.
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