title: eIF2α of Litopenaeus vannamei involved in shrimp immune response to WSSV infection.
abstract: The alpha subunit of Eukaryotic Initiation Factor 2 (eIF2α) is a key translation regulator that plays an important role in cellular stress responses, which including virus infection. To investigate whether WSSV infection can activate the PERK-eIF2α pathway, the eIF2α in shrimp Litopenaeus vannamei, designed as LveIF2α, was analyzed. The LveIF2α, a 332-amino acid polypeptide, shares a high degree of similarity with eIF2α from other species, having two eIF2α protein signatures at the 13-88 aa and 192-243 aa. The WSSV challenge experiment showed that the protein level of the total LveIF2α was decreased after infection, while the phosphorylation of LveIF2α has no significant change, which indicated that the phosphorylation ratio of LveIF2α was increased after infection. Furthermore, inhibitor treatment led to a significant decrease of WSSV loads. Moreover, the Binding immunoglobulin protein (BiP), an endoplasmic reticulum (ER) stress sensor, and PERK were also investigated during virus infection and it was shown that they were both up-regulated. Taken together, these results suggested that WSSV infection can induce ER stress and activated the unfolded protein response (UPR), and the PERK-eIF2α pathway is important for innate immune during WSSV infection in shrimp.
authors.affiliation: School of Life Science, Xiamen University, Xiamen 361005, PR China; State Key Laboratory Breeding Base of Marine Genetic Resources, Xiamen 361005, PR China.
authors.forename: Jingxiang
authors.initials: J
authors.lastname: Xu
authors.affiliation: State Key Laboratory Breeding Base of Marine Genetic Resources, Xiamen 361005, PR China; Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, PR China; Key Laboratory of Marine Genetic Resources, Fujian Province, Xiamen 361005, PR China. Electronic address: ruanlingwei@aliyun.com.
authors.forename: Lingwei
authors.initials: L
authors.lastname: Ruan
authors.affiliation: State Key Laboratory Breeding Base of Marine Genetic Resources, Xiamen 361005, PR China; Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, PR China; Key Laboratory of Marine Genetic Resources, Fujian Province, Xiamen 361005, PR China.
authors.forename: Hong
authors.initials: H
authors.lastname: Shi
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D060829:Arthropod Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics / Q000378:metabolism; D015852:Eukaryotic Initiation Factor-2 / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D005786:Gene Expression Regulation; D007113:Immunity, Innate; D008969:Molecular Sequence Data; D033561:Penaeidae / Q000235:genetics* / Q000276:immunology*; D010802:Phylogeny; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D046848:White spot syndrome virus 1 / Q000502:physiology
chemical_list: D060829:Arthropod Proteins; D018076:DNA, Complementary; D015852:Eukaryotic Initiation Factor-2; D012333:RNA, Messenger
keywords: ER stress; Litopenaeus vannamei; UPR; WSSV; eIF2α