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Background  Knowledge of the virus-host cell interaction could inform us of the molecular pathways exploited by the virus. Studies on viral attachment proteins (VAPs) and candidate receptor proteins involved in WSSV infection, allow a better understanding of how these proteins interact in the viral life cycle. In this study, our aim was to find some host cellular membrane proteins that could bind with white spot syndrome virus (WSSV).    Results  Two proteins were evident by using a virus overlay protein binding assay (VOPBA) with WSSV. A protein with molecular weight 53 kDa, named BP53, was analyzed in this study, which was homologous with the F 1 -ATP synthase beta subunit by mass spectrometry analysis. Rapid amplification of cDNA ends (RACE) PCR was performed to identify the full-length cDNA of the  bp53  gene. The resulting full-length gene consisted of 1836 bp, encoding 525 amino acids with a calculated molecular mass of 55.98 kDa. The deduced amino acid sequence contained three conserved domains of the F 1 -ATP synthase beta subunit. BP53 was therefore designated the F 1 -ATP synthase beta subunit of  L. vannamei . The binding of WSSV to BP53 were also confirmed by competitive ELISA binding assay and co-immunoprecipitation on magnetic beads. To investigate the function of BP53 in WSSV infection, it was mixed with WSSV before the mixture was injected intramuscularly into shrimp. The resulting mortality curves showed that recombinant (r) BP53 could attenuate WSSV infection.    Conclusions  The results revealed that BP53 is involved in WSSV infection. Here is the first time showed the role of shrimp F 1 -ATP synthase beta subunit in WSSV infection.

The role of F1 ATP synthase beta subunit in WSSV infection in the shrimp, Litopenaeus vannamei