文献类型：期刊文献

英文题名：Cloning and molecular characterization of two complement Bf/C2 genes in large yellow croaker (Pseudosciaena crocea)

作者：Wei, Wei[1];Wu, Haizhen[1];Xu, Hongyan[1];Xu, Tao[1];Zhang, Xiao[1];Chang, Kangmei[2];Zhang, Yuanxing[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Zhejiang Ocean Univ, Coll Ocean Sci, Zhoushan 316004, Zhejiang, Peoples R China

年份：2009

卷号：27

期号：2

起止页码：285

外文期刊名：FISH & SHELLFISH IMMUNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000268914600024)】；

基金：This work was supported by the National High Technology Research and Development Program of China (2006AA09Z436) and the Chinese Postdoctoral Science Foundation (20060400172).

语种：英文

外文关键词：Complement factor B; Complement C2; Large yellow croaker; 3D structure; Attenuated live V. anguillarum

摘要：Complement components factor B and C2 are two crucial proteases in the alternative pathway (AP) and classical pathway (CP). Two Bf/C2 cDNAs, LycBf/C2A and LycBf/C2B were isolated from the large yellow croaker (Pseudosciaena crocea) by suppression subtractive hybridization (SSH) and rapid amplification of cDNA ends (RACE). Through sequence alignment and computer 3D modeling analysis, we found that both of the deduced proteins contain three complement control protein (CCP) modules, a von Willebrand factor A (vWFA) domain, and one serine protease (SP) domain. Both structural analysis and phylogenetic analyses suggested that LycBf/C2A is more like human factor B than human C2 while LycBf/C2B is more human C2-like. After that, RT-PCR assay showed that LycBf/C2A and LycBf/C2B were mostly expressed in liver, albeit detectable in other tissues. Finally, after being infected with attenuated live Vibrio anguillarum strain, the expression level of LycBf/C2A and LycBf/C2B were found remarkably up-regulated in liver, spleen and kidney, indicating that the two complement factors play a pivotal role in the immune response to bacterial challenge in large yellow croaker. (C) 2009 Elsevier Ltd. All rights reserved.