Characterization and functional analysis of a novel C1q-domain-containing protein in Japanese flounder (Paralichthys olivaceus)

文献类型： 外文期刊

第一作者： Wang, Lei

作者： Wang, Lei;Fan, Caixia;Xu, Wenteng;Zhang, Yongzhen;Dong, Zhongdian;Xiang, Jinsong;Chen, Songlin;Wang, Lei;Fan, Caixia;Xu, Wenteng;Zhang, Yongzhen;Dong, Zhongdian;Xiang, Jinsong;Chen, Songlin

作者机构：

关键词： Japanese flounder; PoC1 ql3; Complement system; Pathogen-recognition receptor; Antibacterial function

期刊名称：DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY （ 影响因子：3.636； 五年影响因子：3.654 ）

ISSN： 0145-305X

年卷期： 2017 年 67 卷

页码：

收录情况： SCI

摘要： The complement system is important in the innate immune response. C1q-domain-containing proteins have multiple functions and occur extensively in invertebrates and vertebrates. In this study, PoC1 ql3 encoding a C1q-domain-containing protein in the Japanese flounder was identified. The 266-amino-acid polypeptide encoded, PoC1ql3, shares high sequence and structural similarity with orthologues in other fish and mammals. PoC1ql3 is abundantly expressed in the brain, but less in the blood, gills, and liver. Transcripts of PoC1ql3 were down-regulated in the spleen and liver 6-24 h after bacterial infection, but were significantly up-regulated after 48 h. Full-length PoC1ql3 (C1ql3-full) and its gC1q domain (C1ql3-part) were both exerted anti-Edwardsiella tarda activity. C1ql3-part bound to lipopolysaccharide and peptidoglycan, and exerted antibacterial effects against E. tarda in vivo, suggesting that C1ql3 functions as a pathogen-recognition receptor. Therefore, PoC1ql3 functions in the innate immune system, which would facilitate the investigation of the immune system in Japanese flounder. (C) 2016 Elsevier Ltd. All rights reserved.

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