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Caspase-3 serves as an intracellular immune receptor specific for lipopolysaccharide in oyster Crassostrea gigas
Xu, Jiachao1,3; Jiang, Shuai1; Li, Yiqun1,3; Li, Meijia1,3; Cheng, Qi1,4; Zhao, Depeng1,4; Yang, Bin1,3; Jia, Zhihao1,3; Wang, Lingling1; Song, Linsheng2
2016-08-01
发表期刊DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
卷号61页码:1-12
文章类型Article
摘要Apoptosis is a form of programmed cell death process controlled by a family of cysteine proteases called caspases, which plays a crucial role in the immune system homeostasis. The apoptosis and the detailed regulation mechanism have been well studied in vertebrate, but the information in lower animals, especially invertebrates, is still very limited. In the present study, Caspase-3 in the Pacific oyster Crassostrea gigas (designated CgCaspase-3) was enriched by lipopolysaccharide (LPS) affinity chromatography and further identified by MALDI-TOF/TOF-mass spectrometry. The binding activity of CgCaspase-3 to LPS was confirmed by enzyme-linked immunosorbent assay, and surface plasmon resonance analysis revealed its high binding specificity and moderate binding affinity (K-D = 1.08 x 10(-6) M) to LPS. The recombinant CgCaspase-3 exhibited high proteolytic activity to substrate Ac-DEVD-pNA and relatively weak activity to substrate Ac-DMQD-pNA and Ac-VDQQD-pNA. The binding of CgCaspase-3 to LPS significantly inhibited its proteolytic activity toward AC-DEVD-pNA in vitro. The over-expression of CgCaspase-3 leaded to the phosphatidylserine exposure on the external plasma membrane and the cleavage of poly (ADP-ribose) polymerase, which reduced cell viability, and finally induced cell apoptosis. But the cell apoptosis mediated by CgCaspase-3 in vivo was significantly inhibited by the treatment of LPS. These results collectively indicated that CgCaspase-3 could serve as an intracellular LPS receptor, and the interaction of LPS with CgCaspase-3 specifically inhibited the cell apoptosis induced by CgCaspase-3. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Crassostrea Gigas Caspase-3 Intracellular Immune Receptor Lps Immune Response Apoptosis
DOI10.1016/j.dci.2016.03.015
收录类别SCI
语种英语
WOS记录号WOS:000376804300001
引用统计
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/126232
专题实验海洋生物学重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China
2.Dalian Ocean Univ, Minist Agr, Key Lab Mariculture & Stock Enhancement North Chi, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Dalian Polytech Univ, Dalian 116034, Peoples R China
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Xu, Jiachao,Jiang, Shuai,Li, Yiqun,et al. Caspase-3 serves as an intracellular immune receptor specific for lipopolysaccharide in oyster Crassostrea gigas[J]. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY,2016,61:1-12.
APA Xu, Jiachao.,Jiang, Shuai.,Li, Yiqun.,Li, Meijia.,Cheng, Qi.,...&Song, Linsheng.(2016).Caspase-3 serves as an intracellular immune receptor specific for lipopolysaccharide in oyster Crassostrea gigas.DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY,61,1-12.
MLA Xu, Jiachao,et al."Caspase-3 serves as an intracellular immune receptor specific for lipopolysaccharide in oyster Crassostrea gigas".DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 61(2016):1-12.
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