Format:
Online-Ressource (XVIII, 306 p. 31 illus., 7 in color, digital)
ISBN:
9783540385028
Series Statement:
SpringerLink
Content:
The evolutionary origins of hydrogenosomes have been the subject of considerable debate. This volume closes the gap between the endosymbiotic theory for the origin of organelles and their incorporation into evolutionary theory. It reveals that identifying the genetic contribution to eukaryotes of the mitochondrial endosymbiosis, and revealing the functions of its descendent organelles, are key to understanding eukaryotic biology and evolution.
Content:
The evolutionary origins of hydrogenosomes have been the subject of considerable debate. From early days it was apparent that hydrogenosomes had evolved on multiple occasions in different eukaryotes, but from which progenitor organelle or endosymbiont was unresolved. Work from many different laboratories has contributed towards formulating the current hypothesis that hydrogenosomes and mitosomes, their even more reduced cousins, share common ancestry with mitochondria. Their shared similarities, for example their common mechanisms of protein import and their double membrane, can be explained by common ancestry, and their differences by descent with modification under contrasting lifestyles. The hypothesis that mitochondria, mitosomes and hydrogenosomes are homologues, predicts that, as the organelles are studied more deeply, additional shared features will be revealed. However, it is already apparent from the contributions to this volume, that identifying the genetic contribution to eukaryotes of the mitochondrial endosymbiosis, and revealing the functions of its descendent organelles, are key to understanding eukaryotic biology and evolution.
Note:
Includes bibliographical references and index
,
CONTENTS; The Road to Hydrogenosomes; 1.1 Introduction; 1.2 The Story; 1.3 Conclusion; References; 2 Mitochondria: Key to Complexity; 2.1 Introduction; 2.2 Size; 2.3 Compartments; 2.4 Dynamics of Gene Gain and Gene Loss in Bacteria; 2.5 ATP Regulation of Bacterial Replication; 2.6 Redox Poise Across Bioenergetic Membranes; 2.7 Allometric Scaling of Metabolic Rate and Complexity; 2.8 Conclusions; References; 3 Origin, Function, and Transmission of Mitochondria; 3.1 Introduction; 3.2 Origins of Mitochondria; 3.3 Mitochondrial Genomes; 3.4 The Mitochondrial Theory of Ageing
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3.5 Why Are There Genes in Mitochondria?3.6 Co-location of Gene and Gene Product Permits RedoxRegulation of Gene Expression; 3.7 Maternal Inheritance of Mitochondria; 3.8 Conclusions; References; 4 Mitochondria and Their Host: Morphology to Molecular Phylogeny; 4.1 Introduction; 4.2 Alternative Visions; 4.3 Before the Word; 4.4 Les Symbiotes; 4.5 Symbionticism and the Origin of Species; 4.6 Against the Current; 4.7 Infective Heredity; 4.8 The Tipping Point; 4.9 The Birth of Bacterial Phylogenetics; 4.10 Just-So Stories; 4.11 Kingdom Come, Kingdom Go; 4.12 A Chimeric Paradigm
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4.13 RecapitulationReferences; 5 Anaerobic Mitochondria: Properties and Origins; 5.1 Introduction; 5.2 Possible Variants in Anaerobic Metabolism; 5.3 Cytosolic Adaptations to an Anaerobic Energy Metabolism; 5.4 Anaerobically Functioning ATP-Generating Organelles; 5.5 Energy Metabolism in Anaerobically Functioning Mitochondria; 5.6 Adaptations in Electron-Transport Chains in AnaerobicMitochondria; 5.7 Structural Aspects of Anaerobically Functioning Electron-Transport Chains; 5.8 Evolutionary Origin of Anaerobic Mitochondria; 5.9 Conclusion; References
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6 Iron-Sulfur Proteins and Iron-Sulfur Cluster Assembly in Organisms with Hydrogenosomes and Mitosomes6.1 Introduction; 6.2 Mitochondrion-Related Organelles in "Amitochondriate"Eukaryotes; 6.3 Iron-Sulfur Cluster, an Ancient Indispensable Prosthetic Group; 6.4 Iron-Sulfur Proteins in Mitochondria and Other CellCompartments; 6.5 Iron-Sulfur Proteins in Organisms Harboring Hydrogenosomesand Mitosomes; 6.6 Iron-Sulfur Cluster Assembly Machineries; 6.7 Iron-Sulfur Cluster Biosynthesis and the Evolution ofMitochondria; References; 7 Hydrogenosomes (and Related Organelles, Either) Are Not the Same
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7.1 Introduction7.2 Hydrogenosomes and Mitochondrial-Remnant OrganellesEvolved Repeatedly: Evidence from ADP/ATP Carriers; 7.3 Functional Differences Between Mitochondrial and AlternativeADP/ATP Transporters; 7.4 Evolutionary Tinkering in the Evolution ofHydrogenosomes; 7.5 Why an [Fe]-Only Hydrogenase?; 7.6 Conclusions; References; 8 The Chimaeric Origin of Mitochondria: Photosynthetic Cell Enslavement, Gene-Transfer Pressure, and Compartmentation Efficiency; 8.1 Key Early Ideas; 8.2 The Host Was a Protoeukaryote Not an Archaebacterium; 8.3 Was the Slave Initially Photosynthetic?
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8.4 Three Phases of α-proteobacterial Enslavement
Additional Edition:
ISBN 9783540385011
Additional Edition:
Buchausg. u.d.T. Origin of mitochondria and hydrogenosomes Berlin : Springer, 2007 ISBN 3540385010
Additional Edition:
ISBN 9783540385011
Language:
English
Subjects:
Biology
Keywords:
Mitochondrium
;
Hydrogenosom
;
Mitochondrium
;
Mitochondrium
;
Hydrogenosom
;
Aufsatzsammlung
DOI:
10.1007/978-3-540-38502-8
URL:
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