title: cDNA cloning and gene expression pattern following bacterial challenge of peroxinectin in Chinese shrimp Fenneropenaeus chinensis.
abstract: Peroxinectin, a cell-adhesive hemoperoxidase that binds superoxide dismutase and mediates blood cells adhesion and migration in invertebrate, is believed to play an important role in cellular immune reaction. In this study, we reported a new peroxinectin gene homologue from Chinese shrimp Fenneropenaeus chinensis. Based on expressed sequence tags (ESTs) of haemocyte cDNA library, we cloned a 2,611 bps full-length cDNA of peroxinectin gene homologue encoded 801 amino acids. Motif scanning of the predicted polypeptide revealed a peroxidase domain and an integrin binding motif (Lys-Gly-Asp, KGD). Peroxinectin gene expressed constitutively in haemocyte as determined by quantitative real-time RT-PCR, the expression level varied following bacterial challenge. These findings suggested that peroxinectin expression is susceptible to exterior stimulus and maintains at a high expression level during bacterial infection.
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China. bo.dong@sars.uib.no
authors.forename: Bo
authors.initials: B
authors.lastname: Dong
authors.forename: Fengsong
authors.initials: F
authors.lastname: Liu
authors.forename: Hongwei
authors.initials: H
authors.lastname: Gao
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.forename: Jianhai
authors.initials: J
authors.lastname: Xiang
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015815:Cell Adhesion Molecules / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism; D003001:Cloning, Molecular / Q000379:methods; D018076:DNA, Complementary / Q000235:genetics; D015870:Gene Expression; D006434:Hemocytes / Q000378:metabolism; D043143:Hepatopancreas / Q000378:metabolism; D053526:Listonella / Q000737:chemistry; D008969:Molecular Sequence Data; D033561:Penaeidae / Q000201:enzymology / Q000235:genetics*; D010544:Peroxidases / Q000096:biosynthesis / Q000235:genetics* / Q000378:metabolism; D010802:Phylogeny; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D013211:Staphylococcus aureus / Q000737:chemistry
chemical_list: D015815:Cell Adhesion Molecules; D018076:DNA, Complementary; D012333:RNA, Messenger; D010544:Peroxidases