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学科主题: Fisheries ; Immunology ; Marine & Freshwater Biology ; Veterinary Sciences
题名: Characteristic and functional analysis of a ficolin-like protein from the oyster Crassostrea hongkongensis
作者: Xiang, ZM ; Qu, FF ; Wang, FX ; Li, J ; Zhang, YH ; Yu, ZN
通讯作者: carlzyu@scsio.ac.cn
关键词: Crassostrea hongkongensis ; Ficolins ; ChFCN ; Immunity
刊名: FISH & SHELLFISH IMMUNOLOGY
发表日期: 2014
卷: 40, 期:2, 页:514-523
收录类别: sci
部门归属: [Xiang, Zhiming ; Qu, Fufa ; Wang, Fuxuan ; Li, Jun ; Zhang, Yuehuan ; Yu, Ziniu] Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, CAS Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China ; [Qu, Fufa ; Wang, Fuxuan ; Li, Jun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
项目归属: LMB
资助者: National Science Foundation of China [31202021, 41176150]; National Basic Research Program of China [2010CB126404, U1201215]; Program of Administration of Ocean and Fisheries of Guangdong Province, China [A201301B08]
摘要: Ficolins are a group of soluble animal proteins with multiple roles in innate immunity. These proteins recognize and bind carbohydrates in pathogens and activate the complement system, leading to opsonization, leukocyte activation, and direct pathogen killing, which have been reported in many animal species but might not be present in the shellfish lineage. In the present study, we identified the first fibrinogen-related protein from the oyster, Crassostrea hongkongensis. This novel ficolin-like protein contains a typical signal peptide and a fibrinogen-related domain (designated ChFCN) at the N and C termini, respectively, but does not contain the additional collagen-like domain of ficolins. The full-length cDNA of ChFCN is 1105 bp, encoding a putative protein of 297 amino acids with the molecular weight of 35.5 kD. ChFCN is ubiquitously expressed in selected tissues, with the highest expression level observed in the gills. The temporal expression of ChFCN following microbe infection shows that the expression of ChFCN in hemocytes increases at 3 h post-challenge. The ChFCN protein expression was also examined, and fluorescence microscopy revealed that deChFCN (truncated signal peptide) is located in the cytoplasm of HeLa cells. Full-length ChFCN was detected in the medium supernatant by western blot analysis. Recombinant ChFCN proteins with the molecular weight about 50 kD bind Saccharomyces cerevisiae, Staphylococcus haemolyticus or Escherichia coli K-12, but not those from Vibrio alginolyticus. Furthermore, the rChFCN protein could agglutinate Gram-negative bacteria E. coli K-12 and enhance the phagocytosis of C hongkongensis hemocytes in vitro. These results indicate that ChFCN might play an important role in the immunity response of oysters. (C) 2014 Elsevier Ltd. All rights reserved.
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WOS记录号: WOS:000343381100021
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10376
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Xiang, ZM; Qu, FF; Wang, FX; Li, J; Zhang, YH; Yu, ZN.Characteristic and functional analysis of a ficolin-like protein from the oyster Crassostrea hongkongensis,FISH & SHELLFISH IMMUNOLOGY,2014,40(2):514-523
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