Plant aquaporins : from transport to signaling

• Other Authors: Chaumont, François (Editor), Tyerman, Stephen D. (Editor)
• Format: Electronic eBook
• Language: English
• Published: Cham, Switzerland : Springer, 2017.
• Series: Signaling and communication in plants.
• Subjects: Aquaporins.; Plant physiology.; elektronické knihy; electronic books
• ISBN: 9783319493954; 9783319493930
• ISSN: 1867-9048
• Physical Description: 1 online resource

Aquaporins are channel proteins that facilitate the diffusion of water and small uncharged solutes across cellular membranes. Plant aquaporins form a large family of highly divergent proteins that are involved in many different physiological processes. This book will summarize the recent advances re...

Table of Contents:

• Preface; Contents; Structural Basis of the Permeation Function of Plant Aquaporins; 1 Summary; 2 Aquaporins in Living Systems Including Plants; 2.1 Aquaporins Occur in All Kingdoms of Life; 2.2 Plant Aquaporin Sequences and Their Genome-Wide Identification; 2.3 Classification of Aquaporins; 3 Three-Dimensional Structures of Aquaporins; 3.1 Structural Information on Aquaporins Is Available from All Kingdoms of Life; 3.2 An Overall Architecture of Protomers; 3.3 A Circular Bundle and a Solute-Conducting Pore; 3.4 Cytoplasmic and Periplasmic Conical Vestibules.
• 3.5 Aquaporins Exist as Functional Tetramers4 A Structural Basis of Transport by Aquaporins; 4.1 Approaches to Measure Solute Transport Selectivity and Kinetic Parameters; 4.2 Solute Selectivity of Aquaporins; 4.3 Rates of Solute Transport and Mechanisms; 4.4 Dimensional Filtering and the Roles of Constrictions in Permeation of Solutes of Various Volumes; 4.5 Chemical Filtering of Solutes, Barriers for Ion or Proton Conductance Through the Pores of Monomers and Significance of NPA Signatures; 4.6 Ion Conductance Through a Central Pore of Tetramers.
• 4.7 Mutational Studies to Alter Transport Selectivity and Rates5 Gating Mechanisms of Aquaporins Induced by pH, Cation Binding and Phosphorylation or Lengths of Loops and Mutational Studies; 6 The Structural Knowledge of Aquaporins Has Strategic Significance in Agricultural Biotechnology, Nano-Ưbiotechnology and Environmental Sciences; References; Heteromerization of Plant Aquaporins; 1 Aquaporin Hetero-oligomerization; 2 Plant Plasma Membrane Intrinsic Proteins (PIP): The Paradigmatic Case for Hetero-oligomerization of Aquaporins.
• 3 Structure-Function Relationships in PIP Hetero-oligomerization3.1 Loop A; 3.2 Loop E; 3.3 Transmembrane Domains; 4 Co-expression of PIP: A Condition for Oligomerization; 5 Biological Relevance of PIP Hetero-oligomerization; 5.1 Trafficking; 5.2 Biological Activity and Substrate Specificity; 5.3 Proton-Sensing Regulation; 6 Concluding Remarks; References; Plant Aquaporin Trafficking; 1 Introduction; 1.1 PM Trafficking of PIPs; 1.1.1 ER-to-Golgi Trafficking of PIPs Dependent on Trafficking Signals and Heteromerization; 1.1.2 ER-to-Golgi Trafficking of Arabidopsis PIP2.
• 1 Dependent on Phosphorylation1.1.3 Downregulation of Arabidopsis PIP2s in Early Secretary Pathway; 1.1.4 PM Trafficking of PIPs Dependent on SNAREs and a Rab GTPase; 1.2 Dynamic Properties of PIPs; 1.2.1 Approaches Developed to Study the Lateral Diffusion of PIPs; 1.2.2 Approaches Developed to Study the Constitutive Cycling; 1.2.3 Stress-Induced Change of PIP Dynamics and Localization; 1.3 Polar Localization of Aquaporins in Plant Cells; 1.3.1 Polar Localization of Mammalian Aquaporins; 1.3.2 Polar Localization of Plant Aquaporins; 1.4 Trafficking of TIPs.