title: Two cysteine proteinases respond to bacterial and WSSV challenge in Chinese white shrimp Fenneropenaeus chinensis.
abstract: The cDNAs encoding CathL and legumain from Chinese white shrimp Fenneropenaeus chinensis (FcCathL, FcLegu) were obtained. Both FcCathL and FcLegu mRNA were expressed mainly in the hepatopancreas of unchallenged shrimp. Time-course analysis of FcCathL showed that FcCathL was upregulated in the hepatopancreas of shrimp challenged with white spot syndrome virus (WSSV) at 12 h. FcLegu mRNA in hepatopancreas was down-regulated by Vibrio. FcLegu transcript first declined from 2 h to 6 h and then recovered from 12 h to 24 h in hepatopancreas challenged with WSSV. FcCathL protein was detected in the hemocytes, hepatopancreas, gill, stomach, and intestine of unchallenged shrimp. Three bands of FcCathL protein detected in some tissues may represent preproenzyme, single chain and mature double chain form respectively. In hepatopancreas, FcLegu was detected in the proenzyme form. In other tissues, only active form could be detected. The protein of FcLegu was down-regulated by Vibrio or WSSV challenge in the stomach and gills. FcCathL and FcLegu were proposed to play a role in shrimp innate immunity for the first time.
authors.affiliation: School of Life Sciences, Shandong University, Jinan, Shandong 250100, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Ren
authors.forename: Xiao-Wen
authors.initials: XW
authors.lastname: Zhang
authors.forename: Yun-Dong
authors.initials: YD
authors.lastname: Sun
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Sun
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
authors.forename: Zong-Heng
authors.initials: ZH
authors.lastname: Wang
authors.forename: Xiao-Fan
authors.initials: XF
authors.lastname: Zhao
authors.forename: Jin-Xing
authors.initials: JX
authors.lastname: Wang
mesh_terms: D000818:Animals; D056668:Cathepsin L / Q000235:genetics / Q000276:immunology*; D003001:Cloning, Molecular; D003546:Cysteine Endopeptidases / Q000235:genetics / Q000276:immunology*; D015971:Gene Expression Regulation, Enzymologic; D033561:Penaeidae / Q000201:enzymology / Q000276:immunology / Q000382:microbiology / Q000821:virology; D010802:Phylogeny; D011994:Recombinant Proteins / Q000235:genetics / Q000276:immunology; D014733:Vibrio / Q000502:physiology*; D046848:White spot syndrome virus 1 / Q000502:physiology*; D000099240:Asparaginyl Endopeptidase
chemical_list: D056668:Cathepsin L; D003546:Cysteine Endopeptidases; D011994:Recombinant Proteins; D000099240:Asparaginyl Endopeptidase