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- Title
Profiling of cellular proteins in porcine reproductive and respiratory syndrome virus virions by proteomics analysis.
- Authors
Chengwen Zhang; Chunyi Xue; Yan Li; Qingming Kong; Xiangpeng Ren; Xiaoming Li; Dingming Shu; Yingzuo Bi; Yongchang Cao
- Abstract
Background: Porcine reproductive and respiratory syndrome virus (PRRSV) is an enveloped virus, bearing severe economic consequences to the swine industry worldwide. Previous studies on enveloped viruses have shown that many incorporated cellular proteins associated with the virion's membranes that might play important roles in viral infectivity. In this study, we sought to proteomically profile the cellular proteins incorporated into or associated with the virions of a highly virulent PRRSV strain GDBY1, and to provide foundation for further investigations on the roles of incorporated/associated cellular proteins on PRRSV's infectivity. Results: In our experiment, sixty one cellular proteins were identified in highly purified PRRSV virions by twodimensional gel electrophoresis coupled with mass spectrometric approaches. The identified cellular proteins could be grouped into eight functional categories including cytoskeletal proteins, chaperones, macromolecular biosynthesis proteins, metabolism-associated proteins, calcium-dependent membrane-binding proteins and other functional proteins. Among the identified proteins, four have not yet been reported in other studied envelope viruses, namely, guanine nucleotide-binding proteins, tyrosine 3-monooxygenase/tryptophan 5-monooxygenase, peroxiredoxin 1 and galectin-1 protein. The presence of five selected cellular proteins (i.e., β-actin, Tubulin, Annexin A2, heat shock protein Hsp27, and calcium binding proteins S100) in the highly purified PRRSV virions was validated by Western blot and immunogold labeling assays. Conclusions: Taken together, the present study has demonstrated the incorporation of cellular proteins in PRRSV virions, which provides valuable information for the further investigations for the effects of individual cellular proteins on the viral replication, assembly, and pathogenesis.
- Subjects
PORCINE reproductive &; respiratory syndrome; VIRUSES; PROTEOMICS; PROTEINS; ELECTROPHORESIS
- Publication
Virology Journal, 2010, Vol 7, p242
- ISSN
1743-422X
- Publication type
Article
- DOI
10.1186/1743-422X-7-242