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题名: Distinctive Structural Hallmarks and Biological Activities of the Multiple Cathelicidin Antimicrobial Peptides in a Primitive Teleost Fish
作者: Zhang, Xu-Jie1, 2; Zhang, Xiang-Yang1, 2; Zhang, Nu1, 2; Guo, Xia1, 2; Peng, Kai-Song1, 3; Wu, Han1; Lu, Long-Feng1, 2; Wu, Nan1; Chen, Dan-Dan1, 2; Li, Shun1; Nie, Pin1; Zhang, Yong-An1
通讯作者: Zhang, YA (reprint author), Chinese Acad Sci, Inst Hydrobiol, 7 Donghu South Rd, Wuhan 430072, Peoples R China.
刊名: JOURNAL OF IMMUNOLOGY
发表日期: 2015-05-15
DOI: 10.4049/jimmunol.1500182
卷: 194, 期:10, 页:4974-4987
收录类别: SCI
文章类型: Article
部门归属: [Zhang, Xu-Jie ; Zhang, Xiang-Yang ; Zhang, Nu ; Guo, Xia ; Peng, Kai-Song ; Wu, Han ; Lu, Long-Feng ; Wu, Nan ; Chen, Dan-Dan ; Li, Shun ; Nie, Pin ; Zhang, Yong-An] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China ; [Zhang, Xu-Jie ; Zhang, Xiang-Yang ; Zhang, Nu ; Guo, Xia ; Lu, Long-Feng ; Chen, Dan-Dan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China ; [Peng, Kai-Song] Anhui Agr Univ, Coll Anim Sci & Technol, Hefei 230036, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Immunology
研究领域[WOS]: Immunology
英文摘要: Cathelicidin antimicrobial peptides (CAMPs) represent a crucial component of the innate immune system in vertebrates. Although widely studied in mammals, little is known about the structure and function of fish CAMPs. Further to the previous findings, two more cathelicidin genes and multiple transcripts from rainbow trout were identified in the present study. Interestingly, we found that trout have evolved energy-saving forms of cathelicidins with the total deletion of the characteristic cathelin-like domain. Sequence analysis revealed that salmonid CAMPs have formed a special class of antimicrobial peptides in vertebrates with three distinctive hallmarks: the N terminus is intensified by positive charges, the central region consists of repetitive motifs based on RPGGGS, and the C terminus is lowly charged. Immunofluorescence localization of trout CAMPs demonstrated that these peptides expressed mainly at the mucosal layer of gut. Meanwhile, signals around sinusoids were also detected in head kidney. Moreover, the biological activities of trout CAMPs were proved to be mediated by the N terminus. Additionally, the repetitive motifs characteristically existing in Salmonidae increased the structural flexibilities of peptides and further increased the antibacterial and IL-8-stimulating activities. Unlike most a helical and cytotoxic mammalian CAMPs, trout CAMPs, mainly consisting of beta-sheet and random coil, exhibited no cytotoxic activities. The distinctive structural features of trout CAMPs provide new insights into the understanding of the evolution of CAMPs in vertebrates. Moreover, the high bacterial membrane selectivity of trout CAMPs will help to design excellent peptide antibiotics.
关键词[WOS]: SECONDARY STRUCTURE ANALYSES ; FUNCTIONAL-CHARACTERIZATION ; ONCORHYNCHUS-MYKISS ; RAINBOW-TROUT ; HOST-DEFENSE ; GENE FAMILY ; LL-37 ; EXPRESSION ; INNATE ; IDENTIFICATION
语种: 英语
WOS记录号: WOS:000353728800039
ISSN号: 0022-1767
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/23978
Appears in Collections:水生生物分子与细胞生物学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Anhui Agr Univ, Coll Anim Sci & Technol, Hefei 230036, Peoples R China
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