Download or read book Molecular Mechanisms of Proton coupled Electron Transfer and Water Oxidation in Photosystem II written by Shin Nakamura and published by . This book was released on 2020 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reviews photosynthetic water oxidation and proton-coupled electron transfer in photosystem, focusing on the molecular vibrations of amino acid residues and water molecules. Photosynthetic water oxidation performed by plants and cyanobacteria is essential for the sustenance of life on Earth, not only as an electron source for synthesizing sugars from CO2, but also as an O2 source in the atmosphere. Water oxidation takes place at the Mn4CaO5cluster in photosystem II, where a series of electron transfer reactions coupled with proton transfer occur using light energy. The author addresses the unresolved mechanisms of photosynthetic water oxidation and relevant proton-coupled electron transfer reactions using a combined approach of experimental and computational methods such as Fourier transform infrared difference spectroscopy and quantum chemical calculations. The results show that protonation and hydrogen-bond structures of water molecules and amino acid residues in the protein play important roles in regulation of the electron and proton transfer reactions. These findings and the methodology make a significant contribution to our understanding the molecular mechanism of photosynthetic water oxidation.
Download or read book Photosynthetic Water Oxidation and Proton coupled Electron Transfer written by Ian Blake Cooper and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Photosystem II (PSII) is the membrane-bound oxidoreductase peptide complex responsible for the oxidation of water to molecular oxygen and reduction of plastoquinone to plastoquinol. Primary electron transfer is initiated upon absorption of a photon by the primary donor chl resulting in electron transfer and production of a P680+QA charge separated state. P680+ is reduced by YZ (Y161 of the D1 polypeptide subunit), one of two redox-active tyrosine residues found in PSII. This produces a neutral tyrosyl radical (YZ) which is subsequently reduced by electrons derived from water at the oxygen-evolving complex (OEC). The OEC is composed of four manganese, one calcium ion, and one chloride ion. Four photons are required to convert water to O2, each photon advancing the OEC through successive oxidation states or S states. The exact chemical mechanism of water oxidation in PSII is not known. However, proton-coupled electron transfer (PCET) is thought to be one of the fundamental steps in driving the extraction of electrons and protons from water. Here, the mechanism of water oxidation is investigated with focus on PCET events using vibrational spectroscopy. Vibrational spectroscopy is sensitive to changes in protein structure, charge, and hydrogen bonding, and is ideal for the study of fast events coupled with light-induced electron transfer. The results presented here demonstrate the utility of time-resolved infrared spectroscopy in the detection of intermediates of photosynthetic water oxidation. We suggest that proton transfer may precede manganese oxidation during water oxidation based on time-resolved infrared and difference FT-IR spectroscopic results. The mechanism of PCET associated with YZ reduction is investigated. Using reaction-induced difference FT-IR spectroscopy, the identity of the chloride binding site is speculated through the use of bromide exchange at the OEC. Also, proton transfer reactions at the OEC are investigated using azide as a vibrational probe. The advances in the understanding of photosynthetic water oxidation gained in this work will aid in the elucidation of the chemical mechanism of this important reaction. Understanding the details of photosynthetic water oxidation will assist in the development of technology aimed at harnessing the energy of the sun for the benefit of humankind.
Download or read book Molecular Mechanisms of Proton coupled Electron Transfer and Water Oxidation in Photosystem II written by Shin Nakamura and published by Springer Nature. This book was released on 2020-01-03 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book reviews photosynthetic water oxidation and proton-coupled electron transfer in photosystem, focusing on the molecular vibrations of amino acid residues and water molecules. Photosynthetic water oxidation performed by plants and cyanobacteria is essential for the sustenance of life on Earth, not only as an electron source for synthesizing sugars from CO2, but also as an O2 source in the atmosphere. Water oxidation takes place at the Mn4CaO5 cluster in photosystem II, where a series of electron transfer reactions coupled with proton transfer occur using light energy. The author addresses the unresolved mechanisms of photosynthetic water oxidation and relevant proton-coupled electron transfer reactions using a combined approach of experimental and computational methods such as Fourier transform infrared difference spectroscopy and quantum chemical calculations. The results show that protonation and hydrogen-bond structures of water molecules and amino acid residues in the protein play important roles in regulation of the electron and proton transfer reactions. These findings and the methodology make a significant contribution to our understanding the molecular mechanism of photosynthetic water oxidation.
Download or read book Oxygenic Photosynthesis The Light Reactions written by Donald R. Ort and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structure and function of the components of the photosynthetic apparatus and the molecular biology of these components have become the dominant themes in advances in our understanding of the light reactions of oxygenic photosynthesis. Oxygenic Photosynthesis: The Light Reactions presents our current understanding of these reactions in thylakoid membranes. Topics covered include the photosystems, the cytochrome b6-f complex, plastocyanin, ferredoxin, FNR, light-harvesting complexes, and the coupling factor. Chapters are also devoted to the structure of thylakoid membranes, their lipid composition, and their biogenesis. Updates on the crystal structures of cytochrome f, ATP synthase and photosystem I are presented and a section on molecular biology and evolution of the photosynthetic apparatus is also included. The chapters in this book provide a comprehensive overview of photosynthetic reactions in eukaryotic thylakoids. The book is intended for a wide audience, including graduate students and researchers active in this field, as well as those individuals who have interests in plant biochemistry and molecular biology or plant physiology.
Download or read book Primary Processes of Photosynthesis written by G. Renger and published by Royal Society of Chemistry. This book was released on 2008 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume forms part of a two-volume set and is not available for individual purchase. Please view the complete pack (ISBN: 978-0-85404-364-4) for purchase options.
Download or read book Exploiting Proton and Electron transfer Effects to Understand the Mechanism of Water Oxidation in Photosystem II written by Gözde Ulas and published by . This book was released on 2012 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Complementation Studies of Proton coupled Electron Transfer Reactions in Photosystem II written by Anna-Maria Andrea Hays and published by . This book was released on 1999 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photosystem II written by T. Wydrzynski and published by Springer Science & Business Media. This book was released on 2006-01-27 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most mysterious part of photosynthesis yet the most important for all aerobic life on Earth (including ourselves) is how green plants, algae and cyanobacteria make atmospheric oxygen from water. This thermodynamically difficult process is only achieved in Nature by the unique pigment/protein complex known as Photosystem II, using sunlight to power the reaction. The present volume contains 34 comprehensive chapters authored by 75 scientific experts from around the world. It gives an up-to-date account on all what is currently known about the molecular biology, biochemistry, biophysics and physiology of Photosystem II. The book is divided into several parts detailing the protein constituents, functional sites, tertiary structure, molecular dynamics, and mechanisms of homeostasis. The book ends with a comparison of Photosystem II with other related enzymes and bio-mimetic systems. Since the unique water-splitting chemistry catalyzed by Photosystem II leads to the production of pure oxygen gas and has the potential for making hydrogen gas, a primary goal of this book is to provide a molecular guide to future protein engineers and bio-mimetic chemists in the development of biocatalysts for the generation of clean, renewable energy from sunlight and water.
Download or read book Photosynthesis Molecular Approaches to Solar Energy Conversion written by Jian-Ren Shen and published by Springer Nature. This book was released on 2021-09-09 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the modern world, to meet increasing energy demands we need to develop new technologies allowing us to use eco-friendly carbon-neutral energy sources. Solar energy as the most promising renewable source could be the way to solve that problem, but it is variable depending on day time and season. From this side, the understanding of photosynthesis process could be of significant help for us to develop effective strategies of solar energy capturing, conversion, and storage. Plants, algae, and cyanobacteria perform photosynthesis, annually producing around 100 billion tons of dry biomass. Presently, the detailed studies of photosynthetic system structure make functional investigations of the photosynthetic process available, allowing scientists to construct artificial systems for solar energy transduction. This book summarizes exciting achievements in understanding of photosynthetic structures and mechanisms of this process made by world leaders in photosynthesis field, and contains information about modern ideas in development of revolutionary new technologies of energy conversion. Organized according to the natural sequence of events occurring during photosynthesis, the book includes information of both photosynthetic structures and mechanisms and its applications in bioenergetics issues.
Download or read book Computational and Experimental Insights in Redox Coupled Proton Pumping in Proteins written by Vivek Sharma and published by Frontiers Media SA. This book was released on 2021-10-29 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photosynthesis written by Harvey J.M. Hou and published by Elsevier. This book was released on 2023-07-27 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photosynthesis: From Plants to Nanomaterials in the Nanomaterial-Plant Interactions series, summarizes both the foundational mechanisms and latest advances in photosynthesis. With a strong emphasis on artificial photosynthesis, the book also analyzes the role of nanomaterials in energy production. Starting with an introduction to plant photosynthetic systems, chapters discuss the structure of light harvesting systems, energy transfer and membrane protein complexes. The book later describes the role of nanoparticles in photosynthesis, including agricultural applications, advances in nanobionics, and the impact of engineered nanomaterials. This book is an essential read for researchers and students interested in photosynthesis, bionanotechnology and nanomaterials. Presents the latest advances in plant photosynthesis Discusses the role of nanomaterials in energy production and other photosynthetic mechanisms Highlights nanotechnology and artificial photosynthesis
Download or read book Photosynthesis written by G. Garab and published by Springer Science & Business Media. This book was released on 1998-12-15 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photosynthesis is a process on which virtually all life on Earth depends. To answer the basic questions at all levels of complexity, from molecules to ecosystems, and to establish correlations and interactions between these levels, photosynthesis research - perhaps more than any other discipline in biology - requires a multidisciplinary approach. Congresses probably provide the only forums where progress throughout the whole field can be overviewed. The Congress proceedings give faithful pictures of recent advances in photosynthesis research and outline trends and perspectives in all areas, ranging from molecular events to aspects of photosynthesis on the global scale. The Proceedings Book, a set of 4 (or 5) volumes, is traditionally highly recognized and intensely quoted in the literature, and is found on the shelves of most senior scientists in the field and in all major libraries.
Download or read book Hydrogen Bonding and Transfer in the Excited State written by Ke-Li Han and published by John Wiley & Sons. This book was released on 2011-03-16 with total page 1229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an extensive description of the state-of-the-art in research on excited-state hydrogen bonding and hydrogen transfer in recent years. Initial chapters present both the experimental and theoretical investigations on the excited-state hydrogen bonding structures and dynamics of many organic and biological chromophores. Following this, several chapters describe the influences of the excited-state hydrogen bonding on various photophysical processes and photochemical reactions, for example: hydrogen bonding effects on fluorescence emission behaviors and photoisomerization; the role of hydrogen bonding in photosynthetic water splitting; photoinduced electron transfer and solvation dynamics in room temperature ionic liquids; and hydrogen bonding barrier crossing dynamics at bio-mimicking surfaces. Finally, the book examines experimental and theoretical studies on the nature and control of excited-state hydrogen transfer in various systems. Hydrogen Bonding and Transfer in the Excited State is an essential overview of this increasingly important field of study, surveying the entire field over 2 volumes, 40 chapters and 1200 pages. It will find a place on the bookshelves of researchers in photochemistry, photobiology, photophysics, physical chemistry and chemical physics.
Download or read book The Tuning of Electron and Proton coupled Electron Transfer Reactions of Solar Water Oxidation Pulsed Magnetic Resonance Spectroscopy Studies of Photosystem II written by Christopher S. Coates and published by . This book was released on 2013 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Mechanisms of Photosynthesis written by Robert E. Blankenship and published by John Wiley & Sons. This book was released on 2014-05-05 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the clear writing and accessible approach that have made it the authoritative introduction to the field of molecular photosynthesis, this fully revised and updated edition now offers students and researchers cutting-edge topical coverage of bioenergy applications and artificial photosynthesis; advances in biochemical and genetic methods; as well as new analytical techniques. Chapters cover the origins and evolution of photosynthesis; carbon metabolism; photosynthetic organisms and organelles; and the basic principles of photosynthetic energy storage. The book's website includes downloadable PowerPoint slides.
Download or read book Molecular Solar Fuels written by Thomas John Wydrzynski and published by Royal Society of Chemistry. This book was released on 2012 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by experts, this book presents the latest knowledge and chemical prospects in developing hydrogen as a solar fuel.
Download or read book Proton coupled Electron Transfer written by Sebastião J. Formosinho and published by Royal Society of Chemistry. This book was released on 2012 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the most recent developments in the field of PCET reactions, from the theoretical and experimental points of view.
