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<title>Baaden&#x27;s RSS</title><link>http://www.baaden.ibpc.fr/projects/index.html</link><description>News</description><dc:language>en-us</dc:language><dc:creator>baaden@smplinux.de</dc:creator><dc:rights>Copyright 2011 Marc Baaden</dc:rights><dc:date>2012-11-13T00:26:28+01:00</dc:date><admin:generatorAgent rdf:resource="http://www.realmacsoftware.com/" />
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<lastBuildDate>Tue, 13 Nov 2012 00:30:12 +0100</lastBuildDate><item><title>New paper: Understanding small biomolecule-biomaterial interactions: A review of fundamental theoretical and experimental approaches for biomolecule interactions with inorganic surfaces</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2012-11-13T00:26:28+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/7e107a7dc0d527bbf6e2b12f9310af07-23.html#unique-entry-id-23</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/7e107a7dc0d527bbf6e2b12f9310af07-23.html#unique-entry-id-23</guid><content:encoded><![CDATA[Interactions between biomolecules and inorganic surfaces play an important role in natural environments and in industry, including a wide variety of conditions: marine environment, ship hulls (fouling), water treatment, heat exchange, membrane separation, soils, mineral particles at the earth's surface, hospitals (hygiene), art and buildings (degradation and biocorrosion), paper industry (fouling) and more. To better control the first steps leading to adsorption of a biomolecule on an inorganic surface, it is mandatory to understand the adsorption mechanisms of biomolecules of several sizes at the atomic scale, that is, the nature of the chemical interaction between the biomolecule and the surface and the resulting biomolecule conformations once adsorbed at the surface. This remains a challenging and unsolved problem. Here, we review the state of art in experimental and theoretical approaches. We focus on metallic biomaterial surfaces such as TiO(2) and stainless steel, mentioning some remarkable results on hydroxyapatite. Experimental techniques include atomic force microscopy, surface plasmon resonance, quartz crystal microbalance, X-ray photoelectron spectroscopy, fluorescence microscopy, polarization modulation infrared reflection absorption spectroscopy, sum frequency generation and time of flight secondary ion mass spectroscopy. Theoretical models range from detailed quantum mechanical representations to classical forcefield-based approaches.<br /><br />Dominique <strong>Costa</strong>, Pierre-Alain<strong> Garrain</strong>, and Marc <strong>Baaden</strong> in <em>J Biomed Mater Res A. ASAP (27 Sep 2012)<br /></em><em><a href="http://dx.doi.org/10.1002/jbm.a.34416" rel="external">http://dx.doi.org/10.1002/jbm.a.34416</a></em>]]></content:encoded></item><item><title>New paper: Modeling complex biological systems: From solution chemistry to membranes and channels</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2012-11-09T01:28:31+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/82ad576421c752e0c17dc8e2aeb5307d-22.html#unique-entry-id-22</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/82ad576421c752e0c17dc8e2aeb5307d-22.html#unique-entry-id-22</guid><content:encoded><![CDATA[Complex biological systems are intimately linked to their environment, a very crowded and equally complex solution compartmentalized by fluid membranes. Modeling such systems remains challenging and requires a suitable representation of these solutions and their interfaces. Here, we focus on particle-based modeling at an atomistic level using molecular dynamics (MD) simulations. As an example, we discuss important steps in mod- eling the solution chemistry of an ion channel of the ligand-gated ion channel receptor fam- ily, a major target of many drugs including anesthetics and addiction treatments. The bacte- rial pentameric ligand-gated ion channel (pLGIC) called GLIC provides clues about the functional importance of solvation, in particular for mechanisms such as permeation and gat- ing. We present some current challenges along with promising novel modeling approaches.<br /><br />Benoist <strong>Laurent</strong>, Samuel<strong> Murail</strong>, Franck <strong>Da Silva</strong>, Pierre-Jean <strong>Corringer</strong>, and Marc <strong>Baaden</strong> in <em>Pure and Applied Chemistry ASAP</em><br /><a href="http://iupac.org/publications/pac/asap/PAC-CON-12-04-10/" rel="external">http://iupac.org/publications/pac/asap/PAC-CON-12-04-10/</a>]]></content:encoded></item><item><title>New paper: Mixing atomistic and coarse grain solvation models for MD simulations: let WT4 handle the bulk.</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2012-06-06T15:49:02+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/419fbc0518f7a8779e82d492cdf86966-21.html#unique-entry-id-21</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/419fbc0518f7a8779e82d492cdf86966-21.html#unique-entry-id-21</guid><content:encoded><![CDATA[Accurate simulation of biomolecular systems requires the consideration of solvation effects. The arrangement and dynamics of water close to a solute is strongly influenced by the solute itself. However, as the solute-solvent distance increases, the water properties tend to those of the bulk liquid. This suggests that bulk regions can be treated at a coarse grained (CG) level, while keeping the atomistic details around the solute. Since water represents about 80% of any biological system, this approach may offer a significant reduction in the computational cost of simulations without compromising atomistic details. We show here that mixing the popular SPC water model with a CG model for solvation (called WatFour) can effectively mimic the hydration, structure and dynamics of molecular systems composed of pure water, simple electrolyte solutions and solvated macromolecules. As a non trivial example, we present simulations of the SNARE membrane fusion complex, a trimeric protein-protein complex embedded in a double phospholipid bilayer. Comparison with a fully atomistic reference simulation illustrates the equivalence between both approaches.<br /><br />Leonardo <strong>Darre</strong>, Alex <strong>Tek</strong>, Marc <strong>Baaden</strong>, and Sergio <strong>Pantano</strong> in <em>J. Chem. Theory Comput.,</em> Just Accepted Manuscript<br />DOI: 10.1021/ct3001816 - Publication Date (Web): June 4, 2012 - <a href="http://pubs.acs.org/doi/abs/10.1021/ct3001816" rel="self">http://pubs.acs.org/doi/abs/10.1021/ct3001816</a><br />]]></content:encoded></item><item><title>New paper: A locally closed conformation of a bacterial pentameric proton-gated ion channel</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2012-06-05T11:47:33+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/ec0b2bef816686617f2f3bb6e624240b-20.html#unique-entry-id-20</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/ec0b2bef816686617f2f3bb6e624240b-20.html#unique-entry-id-20</guid><content:encoded><![CDATA[<span style="font:14px Arial, Verdana, Helvetica, sans-serif; ">Pentameric ligand-gated ion channels mediate signal transduction through conformational transitions between closed-pore and open-pore states. To stabilize a closed conformation of GLIC, a bacterial proton-gated homolog from Gloeobacter violaceus whose open structure is known, we separately generated either four cross-links or two single mutations. We found all six mutants to be in the same 'locally closed' conformation using X-ray crystallography, sharing most of the features of the open form but showing a locally closed pore as a result of a concerted bending of all of its M2 helices. The mutants adopt several variant conformations of the M2-M3 loop, and in all cases an interacting lipid that is observed in the open form disappears. A single cross-linked mutant is functional, according to electrophysiology, and the locally closed structure of this mutant indicates that it has an increased flexibility. Further cross-linking, accessibility and molecular dynamics data suggest that the locally closed form is a functionally relevant conformation that occurs during allosteric gating transitions.</span><br /><br />By Marie S Prevost, Ludovic Sauguet, Hugues Nury, Catherine Van Renterghem, Christ&egrave;le Huon, Frederic Poitevin, Marc Baaden, Marc Delarue & Pierre-Jean Corringer<br />Published online at NATURE STRUCTURAL & MOLECULAR BIOLOGY | <a href="http://www.nature.com/nsmb/journal/vaop/ncurrent/full/nsmb.2307.html" rel="self">http://www.nature.com/nsmb/journal/vaop/ncurrent/full/nsmb.2307.html</a><br />]]></content:encoded></item><item><title>New open access book chapter: Advances in Human-Protein Interaction - Interactive And Immersive Molecular Simulations</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2012-04-01T19:03:18+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/ca9821e48b73517cdd6a2328a9153e9c-19.html#unique-entry-id-19</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/ca9821e48b73517cdd6a2328a9153e9c-19.html#unique-entry-id-19</guid><content:encoded><![CDATA[Molecular simulations allow researchers to obtain complementary data with respect to experimental studies and to overcome some of their limitations. Current experimental techniques do not allow to observe the full dynamics of a protein at atomic detail. In return, experiments provide the structures, i.e. the spatial atomic positions, for numerous biomolecular systems, which are often used as starting point for simulation studies. In order to predict, to explain and to understand experimental results, researchers have developed a variety of biomolecular representations and algorithms. [&hellip;]<br /><br /><span style="font:14px Arial, Verdana, Helvetica, sans-serif; ">A. Tek, B. Laurent, M. Piuzzi, Z. Lu, M. Baaden, O. Delalande, M. Chavent, N. F&eacute;rey, C. Martin, L. Piccinali, B. Katz, P. Bourdot, Ludovic Autin ; </span><span style="font:14px Arial, Verdana, Helvetica, sans-serif; color:#007115;"><u><a href="http://www.intechopen.com/articles/show/title/advances-in-human-protein-interaction-interactive-and-immersive-molecular-simulations">Advances in Human-Protein Interaction - Interactive And Immersive Molecular Simulations</a></u></span><span style="font:14px Arial, Verdana, Helvetica, sans-serif; "> ; W. Cai and H. Hong ; Intech, Croatia</span>]]></content:encoded></item><item><title>Postdoc or engineer position now open within the ExaViz project</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2012-11-10T01:21:12+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/48967972dc513401c68d2bd6460aad94-18.html#unique-entry-id-18</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/48967972dc513401c68d2bd6460aad94-18.html#unique-entry-id-18</guid><content:encoded><![CDATA[We are seeking a highly motivated candidate to design and implement a next generation visualization platform for analysis of large-scale molecular simulations. In particular, we target two grand challenge applications: modeling a complete influenza virus and analyzing extensive simulations of the GLIC receptor that we recently published in Nature and PNAS, two leading journals. Project foundations were previously established, providing a well defined framework to get started (FvNano). Using visual analytics approaches and high performance interactive graphics, you will implement readily usable state-of-art tools scaling up to the next generation of simulations. This position is a unique training opportunity in a multi-disciplinary environment in collaboration with four leading teams in France and two international partners in the U.K. and in Germany.<br /><br /><a href="http://exaviz.simlab.ibpc.fr/images/documents/exavizpostdoc.pdf" rel="self">PDF-page of this job offer</a> and general background: <a href="http://exaviz.simlab.ibpc.fr" rel="self">http://exaviz.simlab.ibpc.fr</a><br />]]></content:encoded></item><item><title>FvNano ends&#x2c; ExaViz begins..</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2012-04-01T18:54:08+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/fb6a5609f472d1c786b20a9152f1da81-17.html#unique-entry-id-17</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/fb6a5609f472d1c786b20a9152f1da81-17.html#unique-entry-id-17</guid><content:encoded><![CDATA[The FvNano project officially ended on 31 december 2011. We are currently updating the webpages because the project still produces output in the form of publications, posters, websites and code that can be downloaded and tested. Have a look at the <a href="http://www.baaden.ibpc.fr/projects/fvnano/" rel="self">FvNano webpage</a> for the latest details.<br />FVNano-related research will continue in the <a href="http://exaviz.simlab.ibpc.fr/" rel="self">ExaViz project</a> about exa-scalable visual analysis for life & materials sciences. ExaViz already has its own website with a job section and several offers. An overall description of the project and the teams involved is also provided.]]></content:encoded></item><item><title>New paper out: Enzyme Closure and Nucleotide Binding Structurally Lock Guanylate Kinase</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-09-20T23:23:25+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/00f478e2e250cd7b848eac8d03666f3d-16.html#unique-entry-id-16</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/00f478e2e250cd7b848eac8d03666f3d-16.html#unique-entry-id-16</guid><content:encoded><![CDATA[We investigate the conformational dynamics and mechanical properties of guanylate kinase (GK) using a multiscale approach combining high-resolution atomistic molecular dynamics and low-resolution Brownian dynamics simulations. The GK enzyme is subject to large conformational changes, leading from an open to a closed form, which are further influenced by the presence of nucleotides. As suggested by recent work on simple coarse-grained models of apo-GK, we primarily focus on GK's closure mechanism with the aim to establish a detailed picture of the hierarchy and chronology of structural events essential for the enzymatic reaction. We have investigated open-versus-closed, apo-versus-holo, and substrate-versus-product-loaded forms of the GK enzyme. Bound ligands significantly modulate the mechanical and dynamical properties of GK and rigidity profiles of open and closed states hint at functionally important differences. Our data emphasizes the role of magnesium, highlights a water channel permitting active site hydration, and reveals a structural lock that stabilizes the closed form of the enzyme.<br />By Olivier Delalande, Sophie Sacquin-Mora and Marc Baaden, published in<a href="http://dx.doi.org/10.1016/j.bpj.2011.07.048" rel="external"> Biophysical Journal Volume 101, Issue 6, 1440-1449, 21 September 2011</a>.]]></content:encoded></item><item><title>Welcome Samuel&#x2c; Francesco and Antoine</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-09-10T17:19:25+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/42680c5539e57bc9a941aea7d70937d0-15.html#unique-entry-id-15</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/42680c5539e57bc9a941aea7d70937d0-15.html#unique-entry-id-15</guid><content:encoded><![CDATA[Welcome to Samuel Murail, Francesco Oteri and Antoine Taly who have just arrived in the lab. Samuel will be working as a post-doc on the <a href="http://www.baaden.ibpc.fr/projects/glic/" rel="self">Nico_chimera</a> project. Francesco is also carrying out post-doctoral research in the <a href="http://www.lojou.fr/biopac/" rel="external">BioPac</a> project. Antoine <a href="http://bioorga.u-strasbg.fr/grutter/Antoine.html" rel="external">has previously been in Strasbourg</a> and has joined our lab as a CNRS researcher and expert in channels and receptors. ]]></content:encoded></item><item><title>Visualization: teaching resources added</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-08-19T14:18:31+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/5ed9e0935762484b6a2a845057467fb4-14.html#unique-entry-id-14</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/5ed9e0935762484b6a2a845057467fb4-14.html#unique-entry-id-14</guid><content:encoded><![CDATA[I have added <strong>two talks</strong> on visualization to the <a href="http://www.baaden.ibpc.fr/mdteaching.html" rel="self">teaching resources</a>.<br /><ol class="arabic-numbers"><li>The first document explains some of the background related to molecular visualization on GPUs. It relates to a talk given at "<a href="http://visu2010.imag.fr/Site/visu_2010.html" rel="external">Journ&eacute;e visu 2010</a>" on 5-Oct-2010 at EDF Clamart: <a href="http://www.baaden.ibpc.fr/pub/fvnano/10.10.05_Journee_Visu_EDFL.pdf" rel="external">Visualizing Molecules on GPUs talk (PDF)</a>. You can also find related example code and extensive discussion at the <a href="http://hyperballs.sourceforge.net/" rel="self">HyperBalls website</a>. A second, more detailed document is available, with some bits in French, some in English.</li><li>Ce document "La chimie fait son cin&eacute;ma en visualisation mol&eacute;culaire" explique quelques fondements de la visualisation sur cartes graphiques (GPU). Cette conf&eacute;rence a &eacute;t&eacute; pr&eacute;sent&eacute;e en mai 2011 aux <a href="http://www.miec-jirec-2011.u-psud.fr/index.php?option=com_content&view=article&id=13" rel="external">MIEC-JIREC 2011</a>. Vous pouvez t&eacute;l&eacute;charger le document ici: <a href="http://www.baaden.ibpc.fr/pub/teach/baaden_MIEC_JIREC.pdf" rel="external">La chimie fait son cin&eacute;ma en visualisation mol&eacute;culaire (PDF, French+English)</a>.</li></ol>]]></content:encoded></item><item><title>HyperBalls representation: publication and website now online&#x21;</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-08-19T13:30:08+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/c17a1adbd8a2a5cd49b29d8fa9605ef6-13.html#unique-entry-id-13</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/c17a1adbd8a2a5cd49b29d8fa9605ef6-13.html#unique-entry-id-13</guid><content:encoded><![CDATA[The article <strong><em>"GPU-accelerated atom and dynamic bond visualization using hyperballs: A unified algorithm for balls, sticks, and hyperboloids"</em></strong> is now online at the <a href="http://onlinelibrary.wiley.com/doi/10.1002/jcc.21861/abstract" rel="external">Journal of Computational Chemistry website</a> (see abstract below). There is a dedicated website about all things HyperBall, comprising some background information, a picture and movie gallery and download links: <a href="http://hyperballs.sourceforge.net" rel="self">http://hyperballs.sourceforge.net</a>.]]></content:encoded></item><item><title>La chimie fait son cin&#xe9;ma en visualisation mol&#xe9;culaire - support de pr&#xe9;sentation</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-06-06T16:39:19+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/3b1f83b9c23575db51054a1251b118d5-12.html#unique-entry-id-12</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/3b1f83b9c23575db51054a1251b118d5-12.html#unique-entry-id-12</guid><content:encoded><![CDATA[La repr&eacute;sentation visuelle de la structure d&rsquo;une mol&eacute;cule et de ses propri&eacute;t&eacute;s est centrale<br />dans l'enseignement de la chimie. Dans les ann&eacute;es 60 par exemple, Kendrew fabriquait des<br />mod&egrave;les en fil de fer comme outil p&eacute;dagogique. L&rsquo;utilisation des ordinateurs remonte &agrave; 1964,<br />quand Cyrus Levinthal et ses coll&egrave;gues du MIT ont anim&eacute; sur un oscilloscope des mod&egrave;les de<br />macromol&eacute;cules, en &laquo; fil de fer &raquo; &eacute;galement. De nos jours, les illustrations de mol&eacute;cules<br />abondent, et tout le monde peut ais&eacute;ment cr&eacute;er de telles repr&eacute;sentations, m&ecirc;me sur des machines<br />de configuration modeste.<br /><br />N&eacute;anmoins, ces derni&egrave;res ann&eacute;es marquent un tournant dans les possibilit&eacute;s de visualisation<br />offertes, et ce, notamment gr&acirc;ce aux progr&egrave;s mat&eacute;riels et logiciels (cartes graphiques,<br />r&eacute;alit&eacute; augment&eacute;e, 3D,..). Un aspect concerne la visualisation interactive<br />d&rsquo;&eacute;difices mol&eacute;culaires de taille croissante, un autre les repr&eacute;sentations de plus en plus<br />recherch&eacute;es prenant en compte des effets d&rsquo;ombre et de lumi&egrave;re &agrave; l'instar des productions<br />hollywoodiennes.<br /><br />Le but de cet expos&eacute; sera d&rsquo;illustrer l&rsquo;&eacute;volution r&eacute;cente en visualisation scientifique de<br />syst&egrave;mes mol&eacute;culaires, que ce soit avec des dispositifs tr&egrave;s courants ou par les technologies<br />immersives de la r&eacute;alit&eacute; virtuelle.<br /><br />Le support de cette pr&eacute;sentation est maintenant disponible sous forme de <a href="http://www.baaden.ibpc.fr/pub/teach/baaden_MIEC_JIREC.pdf" rel="self">fichier PDF</a>.]]></content:encoded></item><item><title>Visualization: Animation of electrostatic field lines</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-05-16T15:38:02+02:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/79b6e1a9ff79b794e16cba000170d718-11.html#unique-entry-id-11</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/79b6e1a9ff79b794e16cba000170d718-11.html#unique-entry-id-11</guid><content:encoded><![CDATA[The visualization of field lines of the membrane-inserted BLT2 GPCR is implemented as WebGL-page using <a href="http://www.spidergl.org/" rel="external">SpiderGL</a>. There is an <a href="http://www.youtube.com/watch?v=1B6f_awCPL4" rel="self">animation at my Youtube channel</a>, a video that can be <a href="http://www.baaden.ibpc.fr/pub/blt2/blt2fieldlines.m4v" rel="self">downloaded</a> and a web-browser capable page at <a href="http://www.baaden.ibpc.fr/pub/blt2/jbn11.html" rel="self">http://www.baaden.ibpc.fr/pub/blt2/jbn11.html</a>. This visualization is supplementary material to the article <em>Electrostatically-driven fast association and perdeuteration allow transferred cross-relaxation detection for G protein-coupled receptor ligands with equilibrium dissociation constants in the high-to-low nanomolar range</em> by Catoire et al., Journal of Biomolecular NMR 2011.<br /><br />Such molecular visualization applications of <a href="http://www.spidergl.org/" rel="external">SpiderGL</a> are described in more detail in M. Callieri et al., <em><a href="http://www.scivis.ifc.cnr.it/images/stories/PDFarticle/spidermol.pdf" rel="external">Visualization methods for molecular studies on the web platform</a></em>, The Web3D 2010 Conference, 22-24 July 2010, Los Angeles, California<br />]]></content:encoded></item><item><title>An enhanced electronic table about GPU-powered molecular visualization tools</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-02-20T15:37:29+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/f76453026d41a956aa9b0718cf6adf1d-10.html#unique-entry-id-10</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/f76453026d41a956aa9b0718cf6adf1d-10.html#unique-entry-id-10</guid><content:encoded><![CDATA[In our paper "GPU-powered tools boost molecular visualization" we have an overview table with molecular visualization tools and methods that benefit from current GPU technology. You can now access an enhanced electronic version of this table with illustrations, software download links and videos to watch describing the methods. Check it out at <a href="http://www.baaden.ibpc.fr/projects/fvnano/gputools/" rel="self">http://www.baaden.ibpc.fr/projects/fvnano/gputools/</a>.]]></content:encoded></item><item><title>Structure 3D : premier d&#xe9;chiffrage du mode d&#x27;action des anesth&#xe9;siques g&#xe9;n&#xe9;raux</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-02-11T18:52:03+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/999fca933a844fd8abbabc2c7b1e0d22-9.html#unique-entry-id-9</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/999fca933a844fd8abbabc2c7b1e0d22-9.html#unique-entry-id-9</guid><content:encoded><![CDATA[Deux &eacute;quipes de l'Institut Pasteur associ&eacute;es au CNRS publient dans la revue Nature la structure tridimensionnelle de deux anesth&eacute;siques g&eacute;n&eacute;raux associ&eacute;s &agrave; leur r&eacute;cepteur membranaire. Ces recherches fournissent les premi&egrave;res structures &agrave; r&eacute;solution atomique pour comprendre le mode d'action des anesth&eacute;siques, qui depuis leur d&eacute;couverte il y a deux si&egrave;cles est rest&eacute; mal connu. Elles pourraient ainsi constituer une premi&egrave;re &eacute;tape vers la conception de nouveaux compos&eacute;s, plus sp&eacute;cifiques et pr&eacute;sentant moins d'effets secondaires.<br /><br />Dans ce travail, j'ai contribu&eacute; des simulations de dynamique mol&eacute;culaire pour interpr&eacute;ter une partie des mesures exp&eacute;rimentales.<br /><br /><ul class="disc"><li><a href="http://dx.doi.org/10.1038/nature09647" rel="self">Lien vers l'article dans la revue Nature</a></li><li><a href="http://www2.cnrs.fr/presse/communique/2064.htm" rel="self">Lien vers le communiqu&eacute; de presse CNRS</a></li></ul>]]></content:encoded></item><item><title>GPU-powered tools boost molecular visualization - just appeared in Briefings in Bioinformatics</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-02-11T18:45:39+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/d57d3f73e3e1db76fca3f02fb163ebc1-8.html#unique-entry-id-8</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/d57d3f73e3e1db76fca3f02fb163ebc1-8.html#unique-entry-id-8</guid><content:encoded><![CDATA[Recent experimental and modeling advances provide a wealth of structural data on huge macromolecular assemblies available in public databases.  Visual inspection of these huge structures and of their complex shapes remains an important way of unraveling some of their secrets, but requires new approaches to overcome performance limitations and lack of realism. Recent developments, in particular drawing benefit from the capabilities of Graphics Processing Units (GPUs), herald the next generation of molecular visualization solutions addressing these issues.]]></content:encoded></item><item><title>New paper out: X-ray structures of general anaesthetics bound to a pentameric ligand-gated ion channel</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-01-20T00:04:20+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/76895b70f64a98dbaede3d8b2776ac14-7.html#unique-entry-id-7</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/76895b70f64a98dbaede3d8b2776ac14-7.html#unique-entry-id-7</guid><content:encoded><![CDATA[General anaesthetics have enjoyed long and widespread use but their molecular mechanism of action remains poorly understood. There is good evidence that their principal targets are pentameric ligand-gated ion channels1, 2 (pLGICs) such as inhibitory GABAA (&gamma;-aminobutyric acid) receptors and excitatory nicotinic acetylcholine receptors, which are respectively potentiated and inhibited by general anaesthetics. The bacterial homologue from Gloeobacter violaceus3 (GLIC), whose X-ray structure was recently solved4, 5, is also sensitive to clinical concentrations of general anaesthetics6. Here we describe the crystal structures of the complexes propofol/GLIC and desflurane/GLIC.]]></content:encoded></item><item><title>Comment fonctionne un r&#xe9;cepteur de neurotransmetteur au niveau atomique ? </title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-01-13T15:01:30+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/20b5cc5f11be46195ecfbf01d7400be3-6.html#unique-entry-id-6</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/20b5cc5f11be46195ecfbf01d7400be3-6.html#unique-entry-id-6</guid><content:encoded><![CDATA[Depuis de nombreuses ann&eacute;es, les chercheurs du CNRS et de l'Institut Pasteur s&rsquo;attardent &agrave; comprendre les m&eacute;canismes intervenant dans la communication entre les neurones du cerveau. Gr&acirc;ce &agrave; un syst&egrave;me bact&eacute;rien mimant le r&eacute;cepteur humain de la nicotine, ils ont r&eacute;ussi &agrave; simuler, au niveau atomique, les changements conformationnels intervenant dans la traduction du signal chimique apport&eacute; par le neurotransmetteur en un signal &eacute;lectrique, dans le neurone. Ces travaux ont donn&eacute; lieu &agrave; une publication dans la revue PNAS le 22 mars 2010 et ouvrent la voie &agrave; la mise en place future de m&eacute;dicaments adapt&eacute;s aux pathologies c&eacute;r&eacute;brales comme le tabagisme. Plus de d&eacute;tais <a href="http://www.baaden.ibpc.fr/projects/glic/ggate/" rel="self">sur cette partie de mon site</a>.]]></content:encoded></item><item><title>Joyeux No&#xeb;l / Merry X-mas &#x26; DNase</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-01-13T14:48:15+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/1045d8e1edecf3262149d64fcfa2cf2c-5.html#unique-entry-id-5</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/1045d8e1edecf3262149d64fcfa2cf2c-5.html#unique-entry-id-5</guid><content:encoded><![CDATA[Nos travaux sur la DNase I ont servi pour les voeux de l'IDRIS 2011. La carte anim&eacute;e en Flash est accessible <a href="http://www.idris.fr/IDRIS_Voeux2011.swf" rel="external">sur ce site</a>. Le message accompagnant la carte &eacute;tait "Le personnel de l'IDRIS vous pr&eacute;sente ses meilleurs voeux pour la nouvelle ann&eacute;e 2011".<br />Our work on the DNase I enzyme was featured in the IDRIS supercomputer center's 2011 season's greetings. The animated card is accessible <a href="http://www.idris.fr/IDRIS_Voeux2011.swf" rel="external">from this site</a>. The message going with it was "IDRIS team wishes you a happy new year 2011".]]></content:encoded></item><item><title>Mon m&#xe9;moire d&#x27;HDR disponible en t&#xe9;l&#xe9;chargement</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-01-12T13:14:31+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/c02757b70012cc779a0cb1591509ab2a-4.html#unique-entry-id-4</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/c02757b70012cc779a0cb1591509ab2a-4.html#unique-entry-id-4</guid><content:encoded><![CDATA[Vous pouvez t&eacute;l&eacute;charger mon m&eacute;moire HDR &agrave; partir de <a href="http://www.baaden.ibpc.fr/projects/var/hdr/" rel="self">cette page</a>. En r&eacute;sum&eacute;:  La motivation premi&egrave;re de mes travaux de recherche est de combiner des approches exp&eacute;rimentales et th&eacute;oriques dans le domaine de la chimie physique pour atteindre une meilleure compr&eacute;hension des ph&eacute;nom&egrave;nes &agrave; l'&eacute;chelle atomique. Mes travaux en cours traitent de syst&egrave;mes d'int&eacute;r&ecirc;t biologique concernant les processus membranaires et des ph&eacute;nom&egrave;nes accessibles par des m&eacute;thodes de nanomanipulation. Les probl&egrave;mes de la biophysique et biochimie sont au coeur de mes recherches. J'ai effectu&eacute; des simulations complexes de prot&eacute;ines membranaires dans une bicouche lipidique qui se sont montr&eacute;es tout &agrave; fait compl&eacute;mentaires et r&eacute;v&eacute;latrices par rapport aux &eacute;tudes exp&eacute;rimentales de biologie structurale. Une r&eacute;cente collaboration exploitant cette compl&eacute;mentarit&eacute; a donn&eacute; lieu &agrave; une publication dans la revue Nature en d&eacute;but 2009. Les travaux r&eacute;cents visent &agrave; d&eacute;velopper des approches combinant la r&eacute;alit&eacute; virtuelle avec les simulations mol&eacute;culaires. Les syst&egrave;mes biologiques &eacute;tudi&eacute;s pr&eacute;sentent &agrave; la fois un int&eacute;r&ecirc;t physico-chimique, biologique et m&eacute;dical et peuvent atteindre un grand nombre d'atomes. En parall&egrave;le, je m&egrave;ne un travail de fond sur les m&eacute;thodes de simulation et des approches novatrices.]]></content:encoded></item><item><title>Comment fonctionne la DNase I&#x2c; un agent th&#xe9;rapeutique encore mal connu ?</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-01-12T12:51:32+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/14cc45ea638991b00a808d4a7cc09d51-3.html#unique-entry-id-3</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/14cc45ea638991b00a808d4a7cc09d51-3.html#unique-entry-id-3</guid><content:encoded><![CDATA[L'enzyme DNase I, bien connue pour &ecirc;tre un outil largement utilis&eacute; en biochimie et biologie mol&eacute;culaire, est utilis&eacute;e en m&eacute;decine pour lutter contre la mucoviscidose. Des chercheurs du CNRS ont r&eacute;ussi &agrave; comprendre, gr&acirc;ce &agrave; des simulations au niveau atomique, le r&ocirc;le fondamental jou&eacute; par les ions magn&eacute;sium et calcium dans le fonctionnement de la DNase I. Ces travaux ont donn&eacute; lieu &agrave; une publication dans la revue PLOS Computational Biology le 18 novembre 2010 et ouvrent la voie &agrave; l'am&eacute;lioration de m&eacute;dicaments &agrave; base de cette enzyme.<br />Plus de d&eacute;tais <a href="http://www.baaden.ibpc.fr/projects/news/projects/fonflon/dnase" rel="self">sur cette partie de mon site</a>.]]></content:encoded></item><item><title>Predoctoral opening in the Molecular and Cellular M&#x1c;odeling&#xa; group at Heidelberg Institute for Theoretical Studies</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-01-12T10:12:26+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/629134be6efea38d4ea158557a353350-2.html#unique-entry-id-2</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/629134be6efea38d4ea158557a353350-2.html#unique-entry-id-2</guid><content:encoded><![CDATA[<a href="http://www.h-its.org/english/jobs/index.php" rel="external">Predoctoral scholarship in the Molecular and Cellular Modeling group at the Heidelberg Institute for Theoretical Studies (HITS) in Heidelberg, Germany with Prof. Wade.</a><br />We are seeking a highly motivated scientist to join the Molecular and Cellular Modeling group at HITS for their doctoral studies. The research project will involve computational modelling and simulation of protein interactions. <br />]]></content:encoded></item><item><title>Le GGMM2011 du lundi 30 mai 2011 &#x2013; mercredi 1er juin 2011 &#x2013; La Rochelle</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-01-12T09:50:51+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/9b3ffbdd3d0b3e1198a7949eacb247ff-1.html#unique-entry-id-1</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/9b3ffbdd3d0b3e1198a7949eacb247ff-1.html#unique-entry-id-1</guid><content:encoded><![CDATA[Le congr&egrave;s GGMM 2011 aura lieu du lundi 30 mai 2011 au mercredi 1er juin 2011 &agrave; La Rochelle. Parmi les intervenants confirm&eacute;s il y a <a href="http://www.lsd.univ-montp2.fr/spip.php?rubrique76" rel="self">Odile Eisenstein</a>, <a href="http://glyco3d.cermav.cnrs.fr/glyco3d/lessons/starch/page.php.29.html" rel="self">Anne Imberty</a> et <a href="http://dirac.cnrs-orleans.fr/~hinsen" rel="self">Konrad Hinsen</a>. Une page web est mis en place progressivement &agrave; l'adresse <a href="http://ggmm2011.wordpress.com/" rel="self">http://ggmm2011.wordpress.com/</a>. Il s'agit du XVIIe congr&egrave;s du Groupe de Graphisme et Mod&eacute;lisation Mol&eacute;culaire. Le congr&egrave;s se tiendra &agrave; La Rochelle, &agrave; la <a href="http://www.residencelafayette.org/" rel="external">R&eacute;sidence La Fayette</a>. La fin du d&eacute;p&ocirc;t des r&eacute;sum&eacute;s pour les communications orales et par affiches est pr&eacute;vu pour le 1er mars 2011 (cette partie du site n'est pas encore ouverte).<br />Le congr&egrave;s GGMM2011 est organis&eacute; par <a href="http://www-lbt.ibpc.fr/LBT/index.php?page=sacquin-mora-2-2&hl=fr" rel="self">Sophie Sacquin-Mora</a>, Marc Baaden, <a href="http://florentbarbault.wordpress.com/" rel="self">Florent Barbault</a> et <a href="http://www.dsimb.inserm.fr/~poulain/" rel="self">Pierre Poulain</a>.<br /><br /><img class="imageStyle" alt="" src="http://www.baaden.ibpc.fr/projects/news/files/couchsoleilreca1.jpg" width="990" height="180" />]]></content:encoded></item><item><title>News blog opens&#x21; Let&#x27;s start with a job announcement&#x21;</title><dc:creator>baaden@smplinux.de</dc:creator><dc:subject>Back to Main Site</dc:subject><dc:date>2011-01-11T18:31:15+01:00</dc:date><link>http://www.baaden.ibpc.fr/projects/news/files/e492ede53d1b1d795887f592f218ff83-0.html#unique-entry-id-0</link><guid isPermaLink="true">http://www.baaden.ibpc.fr/projects/news/files/e492ede53d1b1d795887f592f218ff83-0.html#unique-entry-id-0</guid><content:encoded><![CDATA[Hi, I decided to add a blog-like news section to the site and will try to update frequently. Let's start with something useful, a job announcement. My colleague Fabio Sterpone has the following position to fill]]></content:encoded></item></channel>
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