White spot syndrome virus (WSSV) is a large enveloped virus, but the organization of its envelope proteins remains largely unknown. In the present study, we used blue native polyacrylamide gel electrophoresis (BN-PAGE) and SDS-PAGE in combination with mass spectrometry to analyze the envelope protein complexome of WSSV. Our results show that the viral envelope consists of multi-protein complexes (MPCs). Within them, the envelope protein VP19 exists as a homotrimer, while another major envelope protein, VP28, mainly exists as a homotetramer. The most notable feature is that the majority of MPCs include VP26 and VP24, suggesting that these two proteins might serve as hub proteins to recruit low-abundance proteins to MPCs and play crucial roles in the process of protein complex formation. Furthermore, we found significant evidence for interactions between several low-abundance proteins, such as VP52B/VP38/VP33 and VP12/VP150. The result of this study may promote the further research on WSSV envelope assembly.
Archives of Virology – Springer Journals
Published: Jul 1, 2011
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