sghC1q, a novel C1q family member from half-smooth tongue sole (Cynoglossus semilaevis): Identification, expression and analysis of antibacterial and antiviral activities

文献类型： 外文期刊

第一作者： Zeng, Yan

作者： Zeng, Yan;Xiang, Jinsong;Lu, Yang;Chen, Yadong;Wang, Tianzi;Gong, Guangye;Wang, Lei;Li, Xihong;Chen, Songlin;Sha, Zhenxia;Zeng, Yan;Chen, Yadong;Xiang, Jinsong;Lu, Yang;Gong, Guangye;Wang, Tianzi;Wang, Lei

作者机构：

关键词： Cynoglossus semilaevis;sghC1q;Expression profile;Antibacterial and antiviral activity

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

ISSN：

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页码：

收录情况： SCI

摘要： The C1q family includes many proteins that contain a globular (gC1q) domain, and this family is widely conserved from bacteria to mammals. The family is divided into three subgroups: C1q, C1q-like and ghC1q. In this study, a novel C1q family member, sghC1q, was cloned and identified from Cynoglossus semilaevis (named CssghC1q). The full-length CssghC1q cDNA spans 905 bp, including an open reading frame (ORF) of 768 bp, a 5'-untranslated region (UTR) of 25 bp and a 3'-UTR of 112 bp. The ORF encodes a putative protein of 255 amino acids (aa) with a deduced molecular weight of 28 kDa. The predicted protein contains a signal peptide (aa 1-19), a coiled-coil region (aa 61-102) and a globular C1q (gC1q) domain (aa 117-255). Protein sequence alignment indicated that the C-terminus of CssghC1q is highly conserved across several species. Phylogenetic analysis indicated that CssghC1q is most closely related to Maylandia zebra C1q-like-2-like. The CssghC1q genomic sequence spanned 1562 bp, with three exons and two introns. CssghC1q is constitutively expressed in all evaluated tissues, with the highest expression in the liver and the weakest in the heart. After a challenge with Vibrio anguillarum, CssghC1q transcript levels exhibited distinct time-dependent response patterns in the blood, head kidney, skin, spleen, intestine and liver. Recombinant CssghC1q protein exhibited antimicrobial activities against Gram-negative bacteria, Gram-positive bacteria and viruses. The minimum inhibitory concentration (MIC) values against Vibrio harveyi, Vibrio anguillarum, Pseudomonas aeruginosa and Staphylococcus aureus were 0.043 mg/mL, 0.087 mg/mL, 0.174 mg/mL and 0.025 mg/mL, respectively. A low concentration (0.06 mg/mL) of CssghC1q showed significant antiviral activity in vitro against nervous necrosis virus (NNV). These results suggest that CssghC1q plays a vital role in immune defense against bacteria and viruses. (C) 2014 Elsevier Ltd. All rights reserved.

分类号： R392

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