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MILS-16 provides an up-to-date review of the impact of alkali metal ions on life. Their bioinorganic chemistry and analytical determination, the solid state structures of bio-ligand complexes and the properties of alkali metal ions in solution in the context of all kinds of biologically relevant ligands are covered, this includes proteins (enzymes) and nucleic acids (G-quadruplexes). Minerals containing sodium (Na+) and potassium (K+) are abundant in the Earth's crust, making Na+ and K+ easily available. In contrast, the alkali elements lithium (Li+), rubidium, and cesium are rare and the radioactive francium occurs only in traces. Since the intra- and extracellular, as well as the compartmental concentrations of Na+ and K+ differ significantly, homeostasis and active transport of these ions are important; this involves transporters/carriers and pore-forming ion channel proteins. Systems like Na+/K+-ATPases, H+/K+-ATPases or Na+/H+ antiporters are thoroughly discussed. The role of K+ in photosynthesis and the role of Na+ in charging the "battery of life" are pointed out. Also, the relationships between alkali metal ions and diseases (e.g., Parkinson or traumatic brain injury) are covered and the relevance of Li+ salts in medicine (pharmacology and mechanism) is reviewed. This and more is treated in an authoritative and timely manner in the 16 stimulating chapters of Volume 16, The Alkali Metal Ions: Their Role for Life, which are written by 44 internationally recognized experts from 12 nations. The impact of this vibrant research area is manifested in nearly 3000 references, over 30 tables and more than 150 illustrations (two thirds in color). MILS-16 also provides excellent information for teaching. Astrid Sigel, Helmut Sigel, and Roland K. O. Sigel have long-standing interests in Biological Inorganic Chemistry. Their research focuses on metal ion interactions with nucleotides and nucleic acids and on related topics. They edited previously 44 volumes in the series Metal Ions in Biological Systems.
Volume 44, devoted solely to the vital research areas concerning the biogeochemistry of metals and their transport in the environment and availability to living systems, offers 9 timely and authoritative chapters on these fascinating topics by 19 internationally recognized experts.
Every two years, the world's leading specialists meet to exchange information on the most recent advances in understanding metals and the part they play in treating some diseases, especially cancer. Most of the elements in our environment are metals. Some are essential for life, such as copper, iron, magnesium, manganese, nickel and zinc; others are toxic, such as arsenic, cadmium, lead and mercury. This book aims to help advance our knowledge of the role of metal ions in a number of fields in biology and medicine. It reproduces the papers given at the International Symposium on Metal Ions in Biology and Medicine organised in Munich in May 1998.
Metal ions are fundamental elements for the maintenance of the lifespan of plants, animals and humans. Their substantial role in biological systems was recognized a long time ago. They are essential for the maintenance of life and their absence can cause growth disorders, severe malfunction, carcinogenesis or death. They are protagonists as macro- or microelements in several structural and functional roles, participating in many bio-chemical reactions, and arise in several forms. They participate in intra- and intercellular communications, in maintaining electrical charges and osmotic pressure, in photosynthesis and electron transfer processes, in the maintenance of pairing, stacking and the stability of nucleotide bases and also in the regulation of DNA transcription. They contribute to the proper functioning of nerve cells, muscle cells, the brain and the heart, the transport of oxygen and to many other biological processes up to the point that we cannot even imagine a life without metals. In this book, the papers published in the Special Issue “The Role of Metal Ions in Biology, Biochemistry and Medicine” are summarized, providing a picture of metal ion uses in biology, biochemistry and medicine, but also pointing out the toxicity impacts on plants, animals, humans and the environment.
In this book we present a largely biochemical look at the metals of life and their functions, which we hope will be of interest to chemists and biologists as well as biochemists. The field of 'inorganic bio chemistry' is one of rapid change. Recent developments in our know ledge of the activity of calcium, and of the iron-sulphur proteins, are two examples, and increasing attention is being paid to non-metals as well [3]. For reasons of space, we shall restrict ourselves to the normal biological activities of metals. We must ignore, on the one hand, the gross physiological effects of metal deficiency or toxicity, and on the other, the many model studies which have been stimulated by the unusual properties of metals in biological systems. Usually the synthesis of model metal compounds follows rather than anticipates the dis covery of novel biological configurations. However, such studies give us a firm basis for an understanding of the biological systems, and sometimes answer questions that cannot be tackled any other way (for instance, what is the net charge on an iron-sulphur cluster?). As a result, we can refer to new and interesting information on the metals oflife at a chemical level. We gratefully acknowledge the help of Professor P. Banks and Dr D. Fenton who have read and criticized the manuscript, though any errors or misconceptions remain our own responsibility. We thank Mr P. Elliot for preparing Fig. 5.2.
Metal ions play key roles in biology. Many are essential for catalysis, for electron transfer and for the fixation, sensing, and metabolism of gases. Others compete with those essential metal ions or have toxic or pharmacological effects. This book is structured around the periodic table and focuses on the control of metal ions in cells. It addresses the molecular aspects of binding, transport and storage that ensure balanced levels of the essential elements. Organisms have also developed mechanisms to deal with the non-essential metal ions. However, through new uses and manufacturing processes, organisms are increasingly exposed to changing levels of both essential and non-essential ions in new chemical forms. They may not have developed defenses against some of these forms (such as nanoparticles). Many diseases such as cancer, diabetes and neurodegeneration are associated with metal ion imbalance. There may be a deficiency of the essential metals, overload of either essential or non-essential metals or perturbation of the overall natural balance. This book is the first to comprehensively survey the molecular nature of the overall natural balance of metal ions in nutrition, toxicology and pharmacology. It is written as an introduction to research for students and researchers in academia and industry and begins with a chapter by Professor R J P Williams FRS.
Comparative Biochemistry: A Comprehensive Treatise, Volume IV: Constituents of Life — Part B focuses on the distribution, biogenesis, and metabolism of cells and organisms. Composed of various literature, the book first looks at the optical asymmetry of metabolites. The natural occurrence of D-amino acids and L-sugars; significance of purity; optical asymmetry and protein structure; and the relationship of optical asymmetry and cancer are discussed. The text also discusses structural studies on cellulose, starch, and glycogen; biochemistry of lignin formation; structure and localization of nucleic acids; and intraspecific and interspecific variations of protein molecules. The book considers the metabolism of aromatic amino acids, structural and chemical properties of keratin-forming tissues, sclerotization, and blood coagulation. The text further discusses metamorphosis and biochemical adaptation in amphibians. The importance of intrinsic tissue sensitivity in tadpoles; comparative morphological alterations; and the increase in serum albumin and serum protein are considered. The book focuses as well on the structure, distribution, and metabolism of porphyrins, pteridines, and carotenoids. The selection is a good source of data for researchers wanting to study the distribution, biogenesis, and metabolism of cells and organisms.