Molecular cloning and characterization of the translationally controlled tumor protein from Fenneropenaeus chinensis.

The translationally controlled tumor protein (TCTP) is a multi-functioning protein that performs vital roles, particularly in various complicated life processes. In this study, a new TCTP cDNA was cloned from Fenneropenaeus chinensis and hence was designated as Fc-TCTP. Its length is 711 bp, and it is characterized by 507-bp open reading frame that encodes a deduced 168-amino acid protein, including a TCTP domain. Moreover, this study analyzed the expression patterns of this gene when it responds to infection specifically with Vibrio anguillarum and the white spot syndrome virus (WSSV). Based on the results, Fc-TCTP was present in all the analyzed tissues. Additionally, Fc-TCTP's expression level decreased after having been infected by bacteria, but was upregulated in the hepatopancreas after having been exposed to WSSV. Likewise, the Fc-TCTP protein was upregulated during its exposure to the virus. These results suggest that Fc-TCTP could well be involved in the antiviral response in F. chinensis.