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Arterivirus replicase processing : regulatory cascade or Gordian knot? Aken, A.T. van

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Arterivirus replicase processing : regulatory cascade or Gordian knot?

Aken, A.T. van

Citation

Aken, A. T. van. (2008, October 22). Arterivirus replicase processing : regulatory cascade or Gordian knot?. Retrieved from https://hdl.handle.net/1887/13216

Version: Corrected Publisher’s Version

License: Licence agreement concerning inclusion of doctoral thesis in the Institutional Repository of the University of Leiden

Downloaded from: https://hdl.handle.net/1887/13216

Note: To cite this publication please use the final published version (if applicable).

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Arterivirus replicase processing:

regulatory cascade or Gordian knot?

Proefschrift

ter verkrijging van

de graad van Doctor aan de Universiteit Leiden,

op gezag van de Rector Magnificus prof. mr. P.F. van der Heijden, volgens besluit van het College voor Promoties

te verdedigen op woensdag 22 oktober 2008 klokke 15.00 uur

door

Arnoldus Theodorus van Aken

geboren te Noordwijkerhout in 1972

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Promotiecommissie

Promotores Prof. dr. E.J. Snijder Prof. dr. A.E. Gorbalenya (Moscow State University)

Referent Prof. dr. J. Ziebuhr

(The Queen’s University of Belfast)

Overige leden Prof. dr. R.C. Hoeben

Prof. dr. F. Koning

Prof. dr. W.J.M. Spaan

(4)

hardlopers zijn doodlopers”

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Table of contents

Chapter 1 General introduction 7

Chapter 2 Chymotrypsin-like proteases as key regulators of the positive-sense RNA virus life cycle

21

Chapter 3 Expression, purification, and in vitro activity of an arterivirus main protease

59

Chapter 4 Structure of arterivirus nsp4: the smallest chymotrypsin-like protease with an Į/ȕ C-terminal extension and alternate conformations of the oxyanion hole

77

Chapter 5 Proteolytic activity and reverse genetics phenotype of EAV nsp4 protease mutants carrying replacements of residues Arg-4, Asp-119, and Arg-203

93

Chapter 6 Mutagenesis analysis of the nsp4 main protease reveals determinants of arterivirus replicase polyprotein autoprocessing

105

Chapter 7 Proteolytic maturation of replicase polyprotein pp1a by the nsp4 main protease is essential for equine arteritis virus replication and includes internal cleavage of nsp7

127

Chapter 8 General discussion 145

Summary 155 Samenvatting 159

Curriculum vitae 163

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