Research area: Molecular Virology
Feline coronaviruses (FCoVs) are highly prevalent in the cat population and classified into two biotypes: feline enteric coronavirus (FECV) leads to inapparent persistent infections of the gut, whereas feline infectious peritonitis virus (FIPV) causes a systemic disease with fatal outcome. According to the „internal mutation theory“, FIPV evolves from FECV by acquiring biotype-changing mutations, which is thought to occur in 5–10% of persistently infected cats. To date, the genetic changes responsible for the biotype switch have not been identified. The unambiguous identification of mutations critically involved in this process requires reverse genetics approaches suitable to produce, characterize, and manipulate genetically defined pairs of FECV-FIPV. The development of reverse genetic systems for FCoV field viruses represents a major technical challenge because these viruses do not grow in standard cell culture systems. In the first CRC 1021 funding period, the Tekes and Ziebuhr groups have resolved this problem and managed to establish reverse genetic systems suitable to produce wild-type and genetically manipulated serotype I field viruses, which will now be employed to identify mutations that contribute to the development of feline infectious peritonitis using both in vitro and in vivo experiments and to study functions of virus-encoded „accessory“ proteins in viral pathogenesis.
Project-related publications of the investigators:
- Lemmermeyer T, Lamp B, Schneider R, Ziebuhr J, Tekes G, Thiel HJ. 2016. Characterization of monoclonal antibodies against feline coronavirus accessory protein 7b. Vet Microbiol 184: 11-19.
- Thiel V, Thiel HJ, Tekes G. 2014. Tackling feline infectious peritonitis via reverse genetics. Bioengineered 5: 396-400.
- Bank-Wolf B, Stallkamp I, Wiese S, Moritz A, Tekes G, Thiel HJ. 2014. Mutations of 3c and spike protein genes correlate with the occurrence of feline infectious peritonitis. Vet Microbiol 173: 177-188.
- Madhugiri R, Fricke M, Marz M, Ziebuhr J. 2014. RNA structure analysis of alphacoronavirus terminal genome regions. Virus Res 194: 76-89.
- de Groot, R. J., S. C. Baker, R. Baric, L. Enjuanes, A. E. Gorbalenya, K. V. Holmes, S. Perlman, L. Poon, P. J. M. Rottier, P. J. Talbot, P. C. Y. Woo, and J. Ziebuhr. 2012. FamilyCoronaviridae, p. 806-828. In A. M. Q. King, M. J. Adams, E. B. Carstens, and E. J. Lefkowitz (ed.), Virus Taxonomy. Elsevier, Amsterdam.
- Tekes, G., D. Spies., B. Bank-Wolf, V. Thiel and H.-J. Thiel. 2012. A reverse genetic approach to study feline infectious peritonitis. J Virol., JVI.00023-12 [pii], 10.1128/JVI.00023-12.
- Lamp, B., C. Riedel, G. Roman-Sosa, M. Heimann, S. Jacobi, P. Becher, H.-J. Thiel and T. Rümenapf. 2011. Biosynthesis of classical Swine Fever virus nonstructural proteins. J. Virol. 84: 3607-3620.
- Züst, R., L. Cervantes-Barragan, M. Habjan, R. Maier, B.W. Neuman, J. Ziebuhr, K.J. Szretter, S.C. Baker, W. Barchet, M.S. Diamond, S.G. Siddell, B. Ludewig, and V. Thiel. 2011. Ribose 2′-O-methylation provides a molecular signature for the distinction of self and non-self mRNA dependent on the RNA sensor Mda5. Nature Immunol. 12: 137-143.
- Tekes, G., R. Hofmann-Lehmann, B. Bank-Wolf, R. Maier, H.-J. Thiel and V. Thiel. 2010. Chimeric feline coronaviruses that encode type II spike protein on type I genetic background display accelerated viral growth and altered receptor usage. J. Virol. 84: 1326-1333.
- Tekes, G., R. Hofmann, I. Stallkamp, V. Thiel and H.-J. Thiel. 2008. Genome organization and reverse genetic analysis of a type I feline coronavirus. J. Virol. 82: 1851-1859.
- Ziebuhr, J. 2008. Coronavirus replicative proteins, p. 65-81. In S. Perlman, T. Gallagher, and E. J. Snijder (ed.), Nidoviruses. ASM Press, Washington, DC.
- Putics, A., A. E. Gorbalenya, and J. Ziebuhr. 2006. Identification of protease and ADP-ribose 1“-monophosphatase activities associated with transmissible gastroenteritis virus non-structural protein 3. J. Gen. Virol. 87: 651-656.
- Minskaia, E., T. Hertzig, A.E. Gorbalenya, V. Campanacci, C. Cambillau, B. Canard, J. Ziebuhr. 2006. Discovery of an RNA virus 3′-5′ exoribonuclease that is critically involved in coronavirus RNA synthesis. Proc. Natl. Acad. Sci. USA 103: 5108-5113.
- Putics, A., W. Filipowicz, J. Hall, A.E. Gorbalenya, and J. Ziebuhr. 2005. ADP-ribose-1″-monophosphatase: a conserved coronavirus enzyme that is dispensable for viral replication in tissue culture. J. Virol. 79: 12721-12731.
- Ivanov, K. A., T. Hertzig, M. Rozanov, S. Bayer, V. Thiel, A. E. Gorbalenya, and J. Ziebuhr. 2004. Major genetic marker of nidoviruses encodes a replicative endoribonuclease. Proc. Natl. Acad. Sci. USA 101: 12694-12699.
- Conzelmann, K.-K., N. Visser, P. v. Woensel, H.-J.Thiel. 1993. Molecular characterization of porcine reproductive and respiratory syndrome virus, a member of the arterivirus group. Virology 193: 329-339.