InhaltsangabePart I. Membrane Proteins from Plant Viruses 1. Membrane Proteins in Plant Viruses Michael J. Adams and John F. Antoniw 1. Introduction 2. Survey of Transmembrane Proteins in Plant Viruses 2.1. The Database 2.2. Software 3. CellToCell Movement Proteins 3.1. The "30k" Superfamily 3.2. Triple Gene Block 3.3. Carmovirus-Like 3.4. Other Movement Proteins 3.5. General Comments 4. Replication Proteins 5. Proteins Involved in Transmission by Vectors 5.1. Insect Transmission 5.2. Fungus Transmission 6. Other Membrane Proteins 7. Conclusions Acknowledgments References 2. Structure and Function of a Viral Encoded K Channel Anna Moroni, James Van Etten, and Gerhard Thiel 1. Introduction 2. K Channels are Highly Conserved Proteins with Important Physiological Functions 3. Structural Aspects of Viral K Channel Proteins as Compared to those from Other Sources 4. The Short N-Terminus is Important for Kcv Function 5. Functional Properties of Kcv Conductance in Heterologous Expression Systems 6. Kcv is a K Selective Channel 7. Kcv has some Voltage Dependency 8. Kcv has Distinct Sensitivity to K Channel Blockers 9. Ion Channel Function in Viral Replication v VimpFM.qxd 17/07/2004 03:07 PM Page v 10. Kcv is Important for Viral Replication 11. Evolutionary Aspects of the Kcv Gene Acknowledgments References Part II. Fusion Proteins 3. HIV gp41: A Viral Membrane Fusion Machine Sergio G. Peisajovich and Yechiel Shai 1. Introduction 2. HIV Envelope Native Conformation 3. ReceptorInduced Conformational Changes 3.1. CD4 Interaction 3.2. CoReceptor Interaction 4. The Actual Membrane Fusion Step 4.1. The Role of the N-Terminal Fusion Domain 4.2. The Role of the C-Terminal Fusion Domain 5. HIV Entry Inhibitors 5.1. CD4Binding Inhibitors 5.2. CoReceptor Binding Inhibitors 5.3. Improving the Activity of Inhibitors that Block Conformational Changes 6. Final Remarks Acknowledgment References 4. Diversity of Coronavirus Spikes: Relationship to Pathogen Entry and Dissemination Edward B. Thorp and Thomas M. Gallagher 1. Introduction 2. S Functions during Coronavirus Entry 3. S Functions during Dissemination of Coronavirus Infections 4. S Polymorphisms Affect Coronavirus Pathogenesis 5. Applications to the SARS Coronavirus 6. Relevance to Antiviral Drug Developments References 5. Aspects of the Fusogenic Activity of Influenza Hemagglutinin Peptides by Molecular Dynamics Simulations L. Vaccaro, K. Cross, S.A. Wharton, J.J. Skehel, and F. Fraternali 1. Introduction 2. Methods 3. Results 3.1. Comparison with Experimental Structures 3.2. Membrane Anchoring vi Contents VimpFM.qxd 17/07/2004 03:07 PM Page vi Contents vii 4. Conclusions Acknowledgment References Part III. Viral Ion Channels/Viroporins 6. Viral Proteins that Enhance Membrane Permeability María Eugenia González and Luis Carrasco 1. Introduction 2. Measuring Alterations in Membrane Permeability 2.1. The Hygromycin B Test 2.2. Entry of Macromolecules into Virus-Infected Cells 2.3. Other Assays to Test the Entry or Exit of Macromolecules from VirusInfected Cells 2.3.1. Entry or Exit of Radioactive Molecules 2.3.2. Entry of ONPG and Dyes 2.3.3. Entry of Propidium Iodide 2.3.4. Release of Cellular Enzymes to Culture Medium 3. Viral Proteins that Modify Permeabi