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The existence of life at high temperatures is quiet fascinating. At elevated temperatures, only microorganisms are capable of growth and survival. A variety of microbes survive and grow at such high temperatures. Many thermophilic microbial genera have been isolated from man-made (washing machines, factory effluents, waste streams and acid mine effluents) and natural (volcanic areas, geothermal areas, terrestrial hot springs, submarine hydrothermal vents, geothermally heated oil reserves and oil wells, sun-heated litter and soils/sediments) thermal habitats throughout the world. Both…mehr

Produktbeschreibung
The existence of life at high temperatures is quiet fascinating. At elevated temperatures, only microorganisms are capable of growth and survival. A variety of microbes survive and grow at such high temperatures. Many thermophilic microbial genera have been isolated from man-made (washing machines, factory effluents, waste streams and acid mine effluents) and natural (volcanic areas, geothermal areas, terrestrial hot springs, submarine hydrothermal vents, geothermally heated oil reserves and oil wells, sun-heated litter and soils/sediments) thermal habitats throughout the world. Both culture-dependent and culture-independent approaches have been employed for understanding the diversity of microbes in hot environments. These organisms not only tolerate such high temperatures but also usually require these for their growth and survival. They are known as thermophiles/thermophilic microbes, which include a wide variety of prokaryotes (Bacteria and Archaea) as well as eukaryotes (Fungi, Algae, Protozoa). Interest in their diversity, ecology, and physiology has increased enormously during the past few decades as indicated by the deliberations in international conferences on extremophiles and thermophiles every alternate year. The Phylogenetic relationship of the known microorganisms indicates the presence of thermophilic microorganisms at the position close to the Last Universal Common Ancestor (LUCA).
It is widely accepted that metal-reducing microorganisms have a large impact on the geochemistry of subsurface environments through the cycling of metals and organic matter, and thereby affect water quality and taste. Furthermore, metal-reducing micro-organisms have potential applications in bioremediation, mineral leaching and energy generation processes and are of evolutionary interest as metal reduction is considered to be a very ancient form of respiration. Protein characterization surprisingly indicated that possible additional functionality and alternate site promiscuity could contribute to the diverse biochemical abilities of the bacteria, especially with respect to microbe-metal interactions. Thermophilic bacteria are also able to reduce a wide spectrum of other metals including Mn (IV), Cr (VI), U (VI), Tc (VII), Co (III), Mo (VI), Au (I, III), and Hg (II) which can be used for immobilization of toxic metals/radionuclides, e.g. for the bioremediation of hot waste water of disposal sites of radioactive wastes having temperature range favorable for thermophiles for a long period of time.
The main sources of CO in hot environments inhabited by anaerobic thermophiles are volcanic exhalations and thermal degradation of organic matter. A number of phylogenetically diverse anaerobic prokaryotes, both Bacteria and Archaea, are known to metabolize CO. CO transformation may be coupled to methanogenesis, acetogenesis, hydrogenogenesis, sulfate or ferric iron reduction. The key enzyme of anaerobic CO utilization, the Ni-containing CO dehydrogenase, is synthesized in hydrogenogens as an enzyme complex with the energy-converting hydrogenase. The genomic analysis shows this enzymatic complex to be encoded by a single gene cluster.
Themophilic moulds and bacteria have been extensively studied in plant biomass bioconversion processes, as sources of industrial enzymes and as gene donors for the heterologous expression of thermostable enzymes. In the development of third generation biofuels such as bioethanol, thermophilic fungal and bacterial enzymes are of particular interest.
The entire genomes of several thermophilic bacteria and archaea have already been sequenced. The analysis of the genomic data provided resources for novel and useful proteins and enzymes. The entire genomic data have also provided specific feature of microbes and important information on the evolution of thermophilic microorganisms. In some thermophilic archaea, multiple types of chaperonins have been identified. The chaperonins have been found to change accordi
  • Produktdetails
  • Verlag: Springer Netherlands / Springer, Berlin
  • 2. Aufl.
  • Seitenzahl: 976
  • Erscheinungstermin: 12. April 2013
  • Englisch
  • Abmessung: 241mm x 160mm x 56mm
  • Gewicht: 1460g
  • ISBN-13: 9789400758988
  • ISBN-10: 9400758987
  • Artikelnr.: 36639691
Inhaltsangabe
Preface.- Part I Thermophiles in the Environment.- 1 Diversity of hot environments and thermophilic microbes, D. Mehta and T. Satyanarayana.- 2 Exploring the ecology of thermophiles from Australia's Great Artesian Basin during the genomic era, C.D. Ogg, M.D. Spanevello and B.K.C. Patel.- 3 Hot environments from Antarctica: source of thermophiles and hyperthermophiles, with potential biotechnological applications, P.A. Flores, M.J. Amenabar and J.M. Blamey.- 4 Bacterial and biochemical properties of newly invented aerobic, high-temperature compost, T. Yoshii, T. Moriya and T. Oshima.- 5 Role of thermophilic microflora in composting, S. Rawat and B.N. Johri.- 6 Metal remediation by thermophilic microorganisms, P. Sar, S.K. Kazy, D.Paul and A.Sarkar.- 7 CO-oxidizing anaerobic thermophilic prokaryotes, T. Sokolova and A. Lebedinsky.- 8 Biomineralization in thermal environments, K. Doi and Y. Fujino.- 9 Phylogeny and biological features of thermophiles, T. Itoh and T. Iino.- 10 Biology, biodiversity and application of thermophilic viruses, K. Uldahl and Xu Peng.- Part II Genomics, metagenomics and biotechnology.- 11 Genomics of thermophilic bacteria and archaea, T.Sato and H. Atomi.- 12 Comparative genomics of thermophilic bacteria and archaea, S. Akanuma, S. Yokobori and A. Yamagishi.- 13 Host-vector system in thermophiles, T. Inoue and Y.Sako.- 14 Molecular chaperones in thermophilic eubacteria and archaea, M. Sahlanand M. Yohda.- 15 Heterologous Production of Thermostable Proteins and Enzymes, H.Sakuraba and T. Ohshima.- 16 Discovery of thermostable enzymes from hot environmental samples by metagenomic approaches, N. Kurosawa.- 17 DNA polymerases and DNA ligases, S. Ishino and Y. Ishino.- 18 Molecular diversity of biotechnological relevance of thermophilic actinobacteria, S.P. Singh, R.J. Shukla and B.A. Kikani.- 19 Mechanisms of thermostability adopted by thermophilic proteins and their use in white biotechnology, J. Littlechild, H. Novak and C. Sayer.- 20