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Author: Mustafa Tekpinar
Publisher:
ISBN:
Category :
Languages : en
Pages : 96
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Book Description
Proteins are large molecular machines. Many of these machines carry out conformationaltransitions to perform function. It is very difficult to determine all metastable proteinconformations experimentally. Therefore, computational methods have been developed toinvestigate metastable protein conformations and conformational transitions. For most ofproteins, atomistic molecular dynamics cannot reach the time scales of conformationaltransitions, which are typically beyond microseconds. The large size of proteins is anotherobstacle in atomistic molecular dynamics simulations. Coarse-grained elastic network modelscan provide an alternative to overcome the time scale and size problems. In this dissertation, we have investigated conformational transitions of proteins by using modified elasticnetwork models. These models can be applied in two ways. First, they allow us to analyzeconformational transition pathways and deduce the dynamic order of structural events. Second, they enable us to build models for unknown protein conformations by incorporatingexperimental data. For the first application, a transition pathway modeling method callediENM will be presented in Chapter 2. For the second application, a flexible fitting methodbased on small angle X-ray scattering (SAXS) data will be discussed in Chapter 3. Ourmethods will be compared to alternative methods and they will be validated by experimentaldata.
Author: Mustafa Tekpinar
Publisher:
ISBN:
Category :
Languages : en
Pages : 96
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Book Description
Proteins are large molecular machines. Many of these machines carry out conformationaltransitions to perform function. It is very difficult to determine all metastable proteinconformations experimentally. Therefore, computational methods have been developed toinvestigate metastable protein conformations and conformational transitions. For most ofproteins, atomistic molecular dynamics cannot reach the time scales of conformationaltransitions, which are typically beyond microseconds. The large size of proteins is anotherobstacle in atomistic molecular dynamics simulations. Coarse-grained elastic network modelscan provide an alternative to overcome the time scale and size problems. In this dissertation, we have investigated conformational transitions of proteins by using modified elasticnetwork models. These models can be applied in two ways. First, they allow us to analyzeconformational transition pathways and deduce the dynamic order of structural events. Second, they enable us to build models for unknown protein conformations by incorporatingexperimental data. For the first application, a transition pathway modeling method callediENM will be presented in Chapter 2. For the second application, a flexible fitting methodbased on small angle X-ray scattering (SAXS) data will be discussed in Chapter 3. Ourmethods will be compared to alternative methods and they will be validated by experimentaldata.
Author: Qiang Cui
Publisher: CRC Press
ISBN: 142003507X
Category : Mathematics
Languages : en
Pages : 448
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Book Description
Rapid developments in experimental techniques continue to push back the limits in the resolution, size, and complexity of the chemical and biological systems that can be investigated. This challenges the theoretical community to develop innovative methods for better interpreting experimental results. Normal Mode Analysis (NMA) is one such technique
Author: Antonio Carcaterra
Publisher: Springer Nature
ISBN: 3030410579
Category : Science
Languages : en
Pages : 2200
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Book Description
This book gathers the peer-reviewed papers presented at the XXIV Conference of the Italian Association of Theoretical and Applied Mechanics, held in Rome, Italy, on September 15-19, 2019 (AIMETA 2019). The conference topics encompass all aspects of general, fluid, solid and structural mechanics, as well as mechanics for machines and mechanical systems, including theoretical, computational and experimental techniques and technological applications. As such the book represents an invaluable, up-to-the-minute tool, providing an essential overview of the most recent advances in the field.
Author: Silke Andrea Wieninger
Publisher:
ISBN:
Category :
Languages : en
Pages : 206
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Book Description
Author: Kilho Eom
Publisher: CRC Press
ISBN: 1439835047
Category : Science
Languages : en
Pages : 564
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Book Description
Until the late 20th century, computational studies of biomolecules and nanomaterials had considered the two subjects separately. A thorough presentation of state-of-the-art simulations for studying the nanoscale behavior of materials, Simulations in Nanobiotechnology discusses computational simulations of biomolecules and nanomaterials together. The book gives readers insight into not only the fundamentals of simulation-based characterizations in nanobiotechnology, but also in how to approach new and interesting problems in nanobiotechnology using basic theoretical and computational frameworks. Presenting the simulation-based nanoscale characterizations in biological science, Part 1: Describes recent efforts in MD simulation-based characterization and CG modeling of DNA and protein transport dynamics in the nanopore and nanochannel Presents recent advances made in continuum mechanics-based modeling of membrane proteins Summarizes theoretical frameworks along with atomistic simulations in single-molecule mechanics Provides the computational simulation-based mechanical characterization of protein materials Discussing advances in modeling techniques and their applications, Part 2: Describes advances in nature-inspired material design; atomistic simulation-based characterization of nanoparticles’ optical properties; and nanoparticle-based applications in therapeutics Overviews of the recent advances made in experiment and simulation-based characterizations of nanoscale adhesive properties Suggests theoretical frameworks with experimental efforts in the development of nanoresonators for future nanoscale device designs Delineates advances in theoretical and computational methods for understanding the mechanical behavior of a graphene monolayer The development of experimental apparatuses has paved the way to observing physics at the nanoscale and opened a new avenue in the fundamental understanding of the physics of various objects such as biological materials and nanomaterials. With expert contributors from around the world, this book addresses topics such as the molecular dynamics of protein translocation, coarse-grained modeling of CNT-DNA interactions, multi-scale modeling of nanowire resonator sensors, and the molecular dynamics simulation of protein mechanics. It demonstrates the broad application of models and simulations that require the use of principles from multiple academic disciplines.
Author: Gregory A. Voth
Publisher: CRC Press
ISBN: 1420059564
Category : Science
Languages : en
Pages : 492
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Book Description
Exploring recent developments in the field, Coarse-Graining of Condensed Phase and Biomolecular Systems examines systematic ways of constructing coarse-grained representations for complex systems. It explains how this approach can be used in the simulation and modeling of condensed phase and biomolecular systems. Assembling some of the most influential, world-renowned researchers in the field, this book covers the latest developments in the coarse-grained molecular dynamics simulation and modeling of condensed phase and biomolecular systems. Each chapter focuses on specific examples of evolving coarse-graining methodologies and presents results for a variety of complex systems. The contributors discuss the minimalist, inversion, and multiscale approaches to coarse-graining, along with the emerging challenges of coarse-graining. They also connect atomic-level information with new coarse-grained representations of complex systems, such as lipid bilayers, proteins, peptides, and DNA.
Author: Ke-li Han
Publisher: Springer Science & Business Media
ISBN: 3319029703
Category : Medical
Languages : en
Pages : 488
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Book Description
This book discusses how biological molecules exert their function and regulate biological processes, with a clear focus on how conformational dynamics of proteins are critical in this respect. In the last decade, the advancements in computational biology, nuclear magnetic resonance including paramagnetic relaxation enhancement, and fluorescence-based ensemble/single-molecule techniques have shown that biological molecules (proteins, DNAs and RNAs) fluctuate under equilibrium conditions. The conformational and energetic spaces that these fluctuations explore likely contain active conformations that are critical for their function. More interestingly, these fluctuations can respond actively to external cues, which introduces layers of tight regulation on the biological processes that they dictate. A growing number of studies have suggested that conformational dynamics of proteins govern their role in regulating biological functions, examples of this regulation can be found in signal transduction, molecular recognition, apoptosis, protein / ion / other molecules translocation and gene expression. On the experimental side, the technical advances have offered deep insights into the conformational motions of a number of proteins. These studies greatly enrich our knowledge of the interplay between structure and function. On the theoretical side, novel approaches and detailed computational simulations have provided powerful tools in the study of enzyme catalysis, protein / drug design, protein / ion / other molecule translocation and protein folding/aggregation, to name but a few. This work contains detailed information, not only on the conformational motions of biological systems, but also on the potential governing forces of conformational dynamics (transient interactions, chemical and physical origins, thermodynamic properties). New developments in computational simulations will greatly enhance our understanding of how these molecules function in various biological events.
Author: Nicoletta Ceres
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Proteins are flexible molecules, which accomplish a variety of cellular tasks through mechanical motions and conformational fluctuations encoded in their three-dimensional structure. Amongst the theoretical approaches contributing to a better understanding of the relationship between protein structure, mechanics, dynamics and function, coarse-grain models are a powerful tool. They can be used to integrate structural and dynamic information over broad time and size scales at a low computational cost, achieved by averaging out the less important degrees of freedom. In this work, fast comparative studies of protein flexibility and mechanics have been performed with the simple coarse-grain Elastic Network Model. However, the dependency of the results on the starting conformation, and the rather constrained backbone dynamics imposed by the harmonic approximation, motivated the development of a new approach, for a more extensive exploration of conformational space. These efforts led to the PaLaCe model, designed to allow significant changes in secondary structure, while maintaining residue specificity despite a lower-level resolution. Using PaLaCe, we were able to reproduce two processes involving protein plasticity: the mechanical unfolding of the I27 domain of the giant muscle protein titin and the near-native dynamics of two homologous enzymes adapted to work at different temperatures. Agreement with experimental data and results from published atomistic models demonstrate that PaLaCe is a reliable, sufficiently accurate, but computationally inexpensive approach. It therefore opens the doors for a systematic investigation of the link between protein dynamics/mechanics and function.
Author:
Publisher: Academic Press
ISBN: 0128111089
Category : Science
Languages : en
Pages : 538
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Book Description
Computational Approaches for Studying Enzyme Mechanism, Part B is the first of two volumes in the Methods in Enzymology series that focuses on computational approaches for studying enzyme mechanism. The serial achieves the critically acclaimed gold standard of laboratory practices and remains one of the most highly respected publications in the molecular biosciences. Each volume is eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. Now with over 550 volumes, the series remains a prominent and essential publication for researchers in all fields of the life sciences and biotechnology, including biochemistry, chemical biology, microbiology, synthetic biology, cancer research, genetics, and other fields of study. Focuses on computational approaches for studying enzyme mechanism Continues the legacy of this premier serial with quality chapters authored by leaders in the field Covers research methods in intermediate filament associated proteins, and contains sections on such topics as lamin-associated proteins, intermediate filament-associated proteins and plakin, and other cytoskeletal cross-linkers
Author:
Publisher: ScholarlyEditions
ISBN: 1464964971
Category : Science
Languages : en
Pages : 1112
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Book Description
Issues in Proteins and Peptides Research and Application: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Proteins and Peptides Research and Application. The editors have built Issues in Proteins and Peptides Research and Application: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Proteins and Peptides Research and Application in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Proteins and Peptides Research and Application: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
