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Velázquez-Lizárraga AE, Sukonthamarn P, Junprung W, Nanakorn Z, Itsathitphaisarn O, Jaroenlak P, Tassanakajon A. Molecular characterization of turtle-like protein in whiteleg shrimp (Litopenaeus vannamei) and its role in Enterocytozoon hepatopenaei infection. FISH & SHELLFISH IMMUNOLOGY 2023; 140:108976. [PMID: 37506856 DOI: 10.1016/j.fsi.2023.108976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/22/2023] [Accepted: 07/25/2023] [Indexed: 07/30/2023]
Abstract
Enterocytozoon hepatopenaei (EHP) is a microsporidian parasite that infects shrimp hepatopancreas, causing growth retardation and disease susceptibility. Knowledge of the host-pathogen molecular mechanisms is essential to understanding the microsporidian pathogenesis. Turtle-like protein (TLP) is part of the immunoglobulin superfamily of proteins, which is widely distributed in the animal kingdom. TLP has multiple functions, such as cell surface receptors and cell adhesion molecules. The spore wall proteins (SWPs) of microsporidia are involved in the infection mechanisms. Some SWPs are responsible for spore adherence, which is part of the activation and host cell invasion processes. Previous studies showed that TLP from silkworms (Bombyx mori) interacted with SWP26, contributing to the infectivity of Nosema bombycis to its host. In this study, we identified and characterized for the first time, the Litopenaeus vannamei TLP gene (LvTLP), which encodes an 827-aa protein (92.4 kDa) composed of five immunoglobulin domains, two fibronectin type III domains, and a transmembrane region. The LvTLP transcript was expressed in all tested tissues and upregulated in the hepatopancreas at 1 and 7 days post-cohabitation (dpc) and at 9 dpc in hemocytes. To identify the LvTLP binding counterpart, recombinant (r)LvTLP and recombinant (r)EhSWP1 were produced in Escherichia coli. Coimmunoprecipitation and enzyme-linked immunosorbent assays demonstrated that rLvTLP interacted with rEhSWP with high affinity (KD = 1.20 × 10-7 M). In EHP-infected hepatopancreases, LvTLP was clustered and co-localized with some of the developing EHP plasmodia. Furthermore, LvTLP gene silencing reduced the EHP copy numbers compared with those of the control group, suggesting the critical role of LvTLP in EHP infection. These results provide insight into the molecular mechanisms of the host-pathogen interactions during EHP infection.
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Affiliation(s)
- Adrián E Velázquez-Lizárraga
- Center of Excellence for Molecular Biology and Genomic of Shrimp, Department of Biochemistry, Faculty of Science, Chulalongkorn University, 254 Phaya Thai Rd, Wang Mai, Pathum Wan, Bangkok, 10330, Thailand
| | - Pongsakorn Sukonthamarn
- Center of Excellence for Molecular Biology and Genomic of Shrimp, Department of Biochemistry, Faculty of Science, Chulalongkorn University, 254 Phaya Thai Rd, Wang Mai, Pathum Wan, Bangkok, 10330, Thailand
| | - Wisarut Junprung
- Center of Excellence for Molecular Biology and Genomic of Shrimp, Department of Biochemistry, Faculty of Science, Chulalongkorn University, 254 Phaya Thai Rd, Wang Mai, Pathum Wan, Bangkok, 10330, Thailand
| | - Zittipong Nanakorn
- Center of Excellence for Molecular Biology and Genomic of Shrimp, Department of Biochemistry, Faculty of Science, Chulalongkorn University, 254 Phaya Thai Rd, Wang Mai, Pathum Wan, Bangkok, 10330, Thailand
| | - Ornchuma Itsathitphaisarn
- Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Faculty of Science, Mahidol University, 272 Rama VI, Road, Thung Phaya Thai, Ratchathewi, Bangkok, 10400, Thailand
| | - Pattana Jaroenlak
- Center of Excellence for Molecular Biology and Genomic of Shrimp, Department of Biochemistry, Faculty of Science, Chulalongkorn University, 254 Phaya Thai Rd, Wang Mai, Pathum Wan, Bangkok, 10330, Thailand
| | - Anchalee Tassanakajon
- Center of Excellence for Molecular Biology and Genomic of Shrimp, Department of Biochemistry, Faculty of Science, Chulalongkorn University, 254 Phaya Thai Rd, Wang Mai, Pathum Wan, Bangkok, 10330, Thailand.
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Shang R, Zhu F, Li Y, He P, Qi J, Chen Y, Sun F, Zhang Y, Wang Q, Shen Z. Identification and localization of Nup170 in the microsporidian Nosema bombycis. Parasitol Res 2021; 120:2125-2134. [PMID: 33768334 DOI: 10.1007/s00436-021-07129-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 03/17/2021] [Indexed: 11/25/2022]
Abstract
As one of the core framework proteins of nuclear pore complex (NPC), nucleoporin Nupl70 acts as a structural adapter between the nucleolus and nuclear pore membrane and maintains the stability of NPC structure through interaction with other proteins. In this study, we identified a Nup170 protein in the microsporidian Nosema bombycis for the first time and named it as NbNup170. Secondary structure prediction showed that the NbNup170 contains α-helices and random coils. The three-dimensional structure of NbNup170 is elliptical in shape. Phylogenetic analysis based on the Nup170 and homologous sequences showed that N. bombycis clustered together with Vairimorpha ceranae and Vairimorpha apis. The immunofluorescence localization results showed that the NbNup170 was located on the plasma membrane of the dormant spore and transferred to the surface of sporoplasm in a punctate pattern when the dormant spore has finished germination, and that NbNup170 was distributed on the nuclear membrane and both sides of the nuclei of early proliferative phase, and only on the nuclear membrane during sporogonic phase in the N. bombycis. qPCR analysis showed that the relative expression level of NbNup170 maintained at a low level from 30 to 78 h post-infection with N. bombycis, then reached the highest at 102 h, while that of NbNup170 was repressed at a very low level throughout its life cycle by RNA interference. These results suggested that NbNup170 protein is involved in the proliferative phase and active during the sporogonic phase of N. bombycis.
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Affiliation(s)
- Ruisha Shang
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Feng Zhu
- College of Life Sciences, Zaozhuang University, Zaozhuang, 277160, Shandong Province, China
- Institute of Sericulture and Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi, 661101, Yunnan Province, China
| | - Yu Li
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Ping He
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Jingru Qi
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Yong Chen
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Fuzhen Sun
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Yiling Zhang
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu Province, China
| | - Qiang Wang
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu Province, China
| | - Zhongyuan Shen
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China.
- Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu Province, China.
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Zhu F, Tang X, Xiao S, Wang H, Zhang Y, Shao Y, Tang F, Chen S, Bai X. The role of Bombyx mori Bmtutl-519 protein in the infection of BmN cells by Nosema bombycis. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 92:283-290. [PMID: 30528488 DOI: 10.1016/j.dci.2018.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 11/30/2018] [Accepted: 12/05/2018] [Indexed: 06/09/2023]
Abstract
Bmtutl-519 is an isoform of the Bombyx Turtle protein and a member of the immunoglobulin superfamily (IgSF). The relative expression level of Bmtutl-519 was significantly upregulated when BmN cells were infected by Nosema bombycis. The subcellular localization of Bmtutl-519 was studied using an indirect immunoinfluscent assay (IFA), Co-localization assay, Western blotting, and enhanced green fluorescent protein (EGFP) fusion constructs expressed in BmN cells transfected with a Bmtutl-519 expression plasmid. The results indicate that Bmtutl-519 is distributed in both the cytoplasm and the cell membrane of BmN cells. Bmtutl-519 may be involved in the infection process of N. bombycis as a cell surface receptor or regulatory factor. Interaction analysis of Bmtutl-519 with NbSWP26, a spore wall protein of N. bombycis involved in host cell adherence and infection, showed that the C-terminal heparin-binding motif (HBM) of NbSWP26 mediates the interaction between these two proteins. Mutation of the NbSWP26 HBM at K208G, K209G, K210G, and K213G led to a loss of the ability to bind the Bmtutl-519 protein. Spore adherence and infection assays showed that Bmtutl-519 enhances the binding ability of N. bombycis to the host cell surface, but this did not enhance host cell infection by N. bombycis. In contrast, the sustained high expression of Bmtutl-519 in BmN cells inhibited the proliferation of N. bombycis spores.
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Affiliation(s)
- Feng Zhu
- Institute of Sericulture and Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi, 661101, Yunnan, China.
| | - Xudong Tang
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu, China; Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu, China
| | - Shengyan Xiao
- Institute of Sericulture and Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi, 661101, Yunnan, China
| | - Hongliang Wang
- Tengzhou No. 1 Middle School of Shangdong Province, Zaozhuang, 277599, Shangdong, China
| | - Yonghong Zhang
- Institute of Sericulture and Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi, 661101, Yunnan, China
| | - Yulan Shao
- Institute of Sericulture and Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi, 661101, Yunnan, China
| | - Fenfen Tang
- Institute of Sericulture and Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi, 661101, Yunnan, China
| | - Shiliang Chen
- Institute of Sericulture and Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi, 661101, Yunnan, China
| | - Xingrong Bai
- Institute of Sericulture and Apiculture, Yunnan Academy of Agricultural Sciences, Mengzi, 661101, Yunnan, China.
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