Béatrice Clouet-d'Orval - Böcker

Archaea constitute a new branch of life alongside bacteria and eukaryotes. These microorganisms are unique in their cellular and molecular aspects. They have evolutionary links with the first eukaryotic cells and are now being used to elucidate fundamental biological questions.Champions of extremophilicity, archaea are helping to lift the veil on the limits of life on Earth. Biology of Archaea 1 explores the discovery and evolution of the field of archaea research.This book also looks at the evolutionary history of archaea and their integration into the tree of life, and examines this complex and extremely diverse world in terms of their ecological niches and their still largely unexplored virosphere.

Archaea constitute a new branch of life alongside bacteria and eukaryotes. These microorganisms are unique in their cellular and molecular aspects. They have evolutionary links with the first eukaryotic cells and are now being used to elucidate fundamental biological questions.Champions of extremophilicity, archaea are helping to lift the veil on the limits of life on Earth. Biology of Archaea 2 presents the diverse molecular mechanisms involved in the fundamental processes of genome maintenance and regulation of gene expression in archaeal cells.This book analyzes the complex machinery involved in chromosome replication, DNA repair, RNA synthesis (transcription) and protein synthesis (translation), and explores the different classes of RNAs and enzymes involved in RNA maturation and degradation. These regulate the stability of messenger and regulatory non-coding RNAs, and contribute to the formation of the mature forms of ribosomal RNAs and transfer RNAs. These molecular mechanisms are closely related to those of eukaryotes.

This book focuses on the regulation of transcription and translation in Archaea and arising insights into the evolution of RNA processing pathways. From synthesis to degradation and the implications of gene expression, it presents the current state of knowledge on archaeal RNA biology in 13 chapters. Topics covered include the modification and maturation of RNAs, the function of small non-coding RNAs and the CRISPR-Cas defense system. While Archaea have long been considered exotic microbial extremophiles, they are now increasingly being recognized as important model microorganisms for the study of molecular mechanisms conserved across the three domains of life, and with regard to the relevance of similarities and differences to eukaryotes and bacteria. This unique book offers a valuable resource for all readers interested in the regulation of gene expression in Archaea and RNA metabolism in general.