Cloning and characterization of Litopenaeus vannamei cystainB-like in WSSV infection.
2020
Abstract Cystatins B is an endogenous cysteine cathepsin inhibitor. In shrimp, cystatins B-like (CSTB-L) has not been characterized and its role in WSSV infection is largely unknown. In this study, a full-length 699 bp CSTB-L sequence with 291 bp open reading frame encoding a 96 amino acid from L.vannamei (Lv) was first cloned. The tissue distribution assay indicated that LvCSTB-L presented ubiquitous expression in most examined tissues, with the most predominant expression in the hepatopancreas and the weakest expression in the muscles. LvCSTB-L transcripts could be induced in the intestine and hepatopancreas by WSSV challenge. The relative expression level of IE1 and VP28 in the LvCSTB-L knockdown shrimp were increased significantly. In addition, the shrimp cumulative mortality was remarkably (p
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