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Book Description
Les protéines membranaires occupent en moyenne 50% de la masse des membranes cellulaires. Cependant, certaines membranes spécialisées peuvent avoir de 20 à 90% de leur masse en protéines. Dans ce cadre, l'importance de l'assemblage des protéines membranaires dans des complexes cohérents, dynamiques et fonctionnels n'est plus à démontrer.Mon projet s'inscrit dans la compréhension des forces qui mènent à l'assemblage des protéines membranaires. J'utilise pour cela le modèle de l'Aquaporine Z (AqpZ) d'Escherichia coli. En premier lieu, j'ai mis en oeuvre une approche de dynamique moléculaire gros grains avec des forces de biais adaptatifs pour étudier les relations entre orientations de deux monomères d'AqpZ. Il existe, de façon surprenante, des forces se propageant à longue distance vraisemblablement par les lipides qui biaisent les orientations relatives entre les protéines.Un deuxième axe de mon travail est l'étude des enrichissements lipidiques autour de l'AqpZ native ou mutée, à différentes distances, avec l'utilisation d'une membrane complexe rendant compte de la diversité lipidique de la membrane interne d'E.coli. Dans cette analyse, la cardiolipine est enrichie à proximité de la protéine. Enfin, j'ai construit un système contenant 125 monomères d'AqpZ dans une membranes simple ou complexe, qui représentent 50% en masse en protéines. Ce système m'a permis de questionner l'évolution spontanée d'un tel système encombré, mais aussi le devenir des forces à longue distance et des lipides enrichis à la surface de la protéine dans ce contexte.
Book Description
Les protéines membranaires occupent en moyenne 50% de la masse des membranes cellulaires. Cependant, certaines membranes spécialisées peuvent avoir de 20 à 90% de leur masse en protéines. Dans ce cadre, l'importance de l'assemblage des protéines membranaires dans des complexes cohérents, dynamiques et fonctionnels n'est plus à démontrer.Mon projet s'inscrit dans la compréhension des forces qui mènent à l'assemblage des protéines membranaires. J'utilise pour cela le modèle de l'Aquaporine Z (AqpZ) d'Escherichia coli. En premier lieu, j'ai mis en oeuvre une approche de dynamique moléculaire gros grains avec des forces de biais adaptatifs pour étudier les relations entre orientations de deux monomères d'AqpZ. Il existe, de façon surprenante, des forces se propageant à longue distance vraisemblablement par les lipides qui biaisent les orientations relatives entre les protéines.Un deuxième axe de mon travail est l'étude des enrichissements lipidiques autour de l'AqpZ native ou mutée, à différentes distances, avec l'utilisation d'une membrane complexe rendant compte de la diversité lipidique de la membrane interne d'E.coli. Dans cette analyse, la cardiolipine est enrichie à proximité de la protéine. Enfin, j'ai construit un système contenant 125 monomères d'AqpZ dans une membranes simple ou complexe, qui représentent 50% en masse en protéines. Ce système m'a permis de questionner l'évolution spontanée d'un tel système encombré, mais aussi le devenir des forces à longue distance et des lipides enrichis à la surface de la protéine dans ce contexte.
Author: Publisher: Academic Press ISBN: 0080585124 Category : Science Languages : en Pages : 191
Book Description
This volume brings together contributors from several different fields of cell biology, physiology, and molecular biology. The common thread that runs through all of the work presented is that cell processes regulate the activities of membrane transport proteins and classes of membrane transport proteins participate in a number of critical cell phenomena. This volume is unique in covering three different members of the ATP Binding Cassette family (MDR, CFTR and STE6) in one place, as well as in including structure and function analysis of the sodium pump in the same forum where its cell biology is considered. The book will appeal to a broad range of biologists with interests in membrane transport, membrane biology, cell biology, and sorting.
Author: Charles M. Mansbach Publisher: Springer Science & Business Media ISBN: 9780306462412 Category : Medical Languages : en Pages : 464
Book Description
This book was stimulated by the enthusiasm shown by attendees at the meetings in Saxon River, VT, sponsored by the Federation ofAmerican Societies for Experimental Biology (FASEB), on the subject of the intestinal processing of lipids. When these meetings were first started in 1990, the original organizers, two of whom are editors ofthis volume (CMM and PT), had two major goals. The first was to bring together a diverse group ofinvestiga tors who had the common goal of gaining a better understanding of how the intestine ab sorbs lipids. The second was to stimulate the interest of younger individuals whom we wished to recruit into what we believed was an exciting and fruitful area ofresearch. Since that time, the field has opened up considerably with new questions being asked and new an swers obtained, suggesting that our original goals for the meetings were being met. In the same spirit, it occurred to us that there has not been a recentbook that draws to gethermuch ofthe informationavailableconcerninghow the intestineprocesses lipids. This book is intended to reach investigators with an interest in this area and their pre- and post doctoral students. The chapters are written by individuals who have a long-term interest in the areas about which they write, and many have been speakers at the subsequent FASEB conferences that have followed on the first.
Author: Publisher: Academic Press ISBN: 0128241594 Category : Medical Languages : en Pages : 384
Book Description
Advances in Cancer Research, Volume 150, the latest release in this ongoing series, covers the relationship(s) between autophagy and senescence, how they are defined, and the influence of these cellular responses on tumor dormancy and disease recurrence. Specific sections in this new release include Autophagy and senescence, converging roles in pathophysiology, Cellular senescence and tumor promotion: role of the unfolded protein response, autophagy and senescence in cancer stem cells, Targeting the stress support network regulated by autophagy and senescence for cancer treatment, Autophagy and PTEN in DNA damage-induced senescence, mTOR as a senescence manipulation target: A forked road, and more. Addresses the relationship between autophagy and senescence in cancer therapy Covers autophagy and senescence in tumor dormancy Explores autophagy and senescence in disease recurrence
Author: Patrick Bertrand Publisher: Springer Nature ISBN: 3030396630 Category : Science Languages : en Pages : 420
Book Description
Although originally invented and employed by physicists, electron paramagnetic resonance (EPR) spectroscopy has proven to be a very efficient technique for studying a wide range of phenomena in many fields, such as chemistry, biochemistry, geology, archaeology, medicine, biotechnology, and environmental sciences. Acknowledging that not all studies require the same level of understanding of this technique, this book thus provides a practical treatise clearly oriented toward applications, which should be useful to students and researchers of various levels and disciplines. In this book, the principles of continuous wave EPR spectroscopy are progressively, but rigorously, introduced, with emphasis on interpretation of the collected spectra. Each chapter is followed by a section highlighting important points for applications, together with exercises solved at the end of the book. A glossary defines the main terms used in the book, and particular topics, whose knowledge is not required for understanding the main text, are developed in appendices for more inquisitive readers.
Author: Gilles Gasser Publisher: John Wiley & Sons ISBN: 111851002X Category : Science Languages : en Pages : 437
Book Description
Understanding, identifying and influencing the biological systems are the primary objectives of chemical biology. From this perspective, metal complexes have always been of great assistance to chemical biologists, for example, in structural identification and purification of essential biomolecules, for visualizing cellular organelles or to inhibit specific enzymes. This inorganic side of chemical biology, which continues to receive considerable attention, is referred to as inorganic chemical biology. Inorganic Chemical Biology: Principles, Techniques and Applications provides a comprehensive overview of the current and emerging role of metal complexes in chemical biology. Throughout all of the chapters there is a strong emphasis on fundamental theoretical chemistry and experiments that have been carried out in living cells or organisms. Outlooks for the future applications of metal complexes in chemical biology are also discussed. Topics covered include: • Metal complexes as tools for structural biology • IMAC, AAS, XRF and MS as detection techniques for metals in chemical biology • Cell and organism imaging and probing DNA using metal and metal carbonyl complexes • Detection of metal ions, anions and small molecules using metal complexes • Photo-release of metal ions in living cells • Metal complexes as enzyme inhibitors and catalysts in living cells Written by a team of international experts, Inorganic Chemical Biology: Principles, Techniques and Applications is a must-have for bioinorganic, bioorganometallic and medicinal chemists as well as chemical biologists working in both academia and industry.
Author: James Flaherty Publisher: Routledge ISBN: 1136416986 Category : Business & Economics Languages : en Pages : 245
Book Description
Praise for the first edition: “As interest in coaching grows, I think Flaherty’s book will come to stand out as a definitive work.” – Peter M. Senge Coaching: Evoking Excellence in Others proposes rigorous methods of practice and self-observation in a relationship of mutual trust, respect and freedom of expression. It will probe you to rethink and possibly undo how you relate to your clients, your partner, your staff, your friends, and how you produce long-term excellent performance in yourself. This 2nd edition includes new chapters on working with the body and what to do when we find ourselves stuck in our coaching efforts. These chapters, have been included to expand the coaches repertory and readiness to step into wider areas of engagement with clients. As with the previous edition these chapters have annotated bibliographies at their conclusion that will assist the reader in continuing their study. The appendix also has expanded list of self-observation exercises and practices as well as additional material that can be used in assessment. This book will act as a learning guide for new coaches and master coaches who want to challenge their methods of partnering with clients. It is also applicable to managers intending to include coaching in their developmental roles with team members. The author has led workshops in coaching, communication, leadership, and project management for more than 12,000 people. These have included participants from many Fortune 500 companies such as AT&T, FMC, Chrysler, Ernst & Young, Cargill, Levi Strauss and Coopers & Lybrand.
Author: Ursula Jakob Publisher: Springer Science & Business Media ISBN: 9400757875 Category : Science Languages : en Pages : 488
Book Description
Many physiological conditions such as host defense or aging and pathological conditions such as neurodegenerative diseases, and diabetes are associated with the accumulation of high levels of reactive oxygen species and reactive nitrogen species. This generates a condition called oxidative stress. Low levels of reactive oxygen species, however, which are continuously produced during aerobic metabolism, function as important signaling molecules, setting the metabolic pace of cells and regulating processes ranging from gene expression to apoptosis. For this book we would like to recruit the experts in the field of redox chemistry, bioinformatics and proteomics, redox signaling and oxidative stress biology to discuss how organisms achieve the appropriate redox balance, the mechanisms that lead to oxidative stress conditions and the physiological consequences that contribute to aging and disease.
Author: Denis J. Murphy Publisher: John Wiley & Sons ISBN: 1405148128 Category : Science Languages : en Pages : 424
Book Description
New research tools have revealed many surprising aspects of thedynamic nature of lipids and their participation in processes suchas recognition, intra- and inter-cellular signalling, deterrenceand defence against pathogens, membrane trafficking and proteinfunction. This is in addition to new information on the moreestablished roles of plant lipids as structural components ofmembranes and as long-term storage products. Plant lipids are alsoincreasingly being seen as sources of a new generation ofenvironmentally friendly, biodegradable and renewable industrialproducts, including biopolymers and high grade lubricants. This volume provides a broad overview of plant lipid researchand its many applications, linking the various disciplines andproviding an interesting and wide-ranging perspective on thisfast-moving field. Extensive lists of references are provided,totalling well over two thousand non-redundant citations andoffering a point of entry to the detailed literature. This is a book for researchers and professionals in plantbiochemistry, molecular biology, biotechnology and genetics, inboth the academic and industrial sectors.
Author: Marlon Sidore
Author: Marlon Sidore
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Author: 
Author: Charles M. Mansbach
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Author: Patrick Bertrand
Author: Gilles Gasser
Author: James Flaherty
Author: Ursula Jakob
Author: Denis J. Murphy