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Li C, Guo XR, Dong ZM, Gao YJ, Li XL, Zhang L, Zheng HQ, Wang LL, Lu C, Tian XX, Yan MH. Novel interacting proteins identified by tandem affinity purification and mass spectrometry associated with IFITM3 protein during PDCoV infection. Int J Biol Macromol 2024:132755. [PMID: 38821295 DOI: 10.1016/j.ijbiomac.2024.132755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/11/2024] [Accepted: 05/28/2024] [Indexed: 06/02/2024]
Abstract
Interferon-induced transmembrane 3 (IFITM3) is a membrane-associated protein that exhibits antiviral activities against a wide range of viruses through interactions with other cellular and viral proteins. However, knowledge of the mechanisms of IFITM3 in Porcine deltacoronavirus (PDCoV) infection has been lacking. In this study, we demonstrate that IFN-α treatment induces the upregulation of IFITM3 activity and thus attenuates PDCoV infection. PDCoV replication is inhibited in a dose-dependent manner by IFITM3 overexpression. To clarify the novel roles of IFITM3 during PDCoV infection, proteins that interact with IFITM3 were screened by TAP/MS in an ST cell line stably expressing IFITM3 via a lentivirus. We identified known and novel candidate IFITM3-binding proteins and analyzed the protein complexes using GO annotation, KEGG pathway analysis, and protein interaction network analysis. A total of 362 cellular proteins associate with IFITM3 during the first 24 h post-infection. Of these proteins, the relationship between IFITM3 and Rab9a was evaluated by immunofluorescence colocalization analysis using confocal microscopy. IFITM3 partially colocalized with Rab9a and Rab9a exhibited enhanced colocalization following PDCoV infection. We also demonstrated that IFITM3 interacts specifically with Rab9a. Our results considerably expand the protein networks of IFITM3, suggesting that IFITM3 participates in multiple cellular processes during PDCoV infection.
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Affiliation(s)
- Cheng Li
- Tianjin Key Laboratory of Animal Molecular Breeding and Biotechnology, Institute of Animal Science and Veterinary, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China; Tianjin Observation and Experimental Site of National Animal Health, Tianjin 300381, China; National Data Center of Animal Health, Tianjin 300381, China
| | - Xiao-Ran Guo
- Tianjin Key Laboratory of Animal Molecular Breeding and Biotechnology, Institute of Animal Science and Veterinary, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China; Tianjin Observation and Experimental Site of National Animal Health, Tianjin 300381, China; National Data Center of Animal Health, Tianjin 300381, China
| | - Zhi-Min Dong
- Tianjin Key Laboratory of Animal Molecular Breeding and Biotechnology, Institute of Animal Science and Veterinary, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China; Tianjin Observation and Experimental Site of National Animal Health, Tianjin 300381, China; National Data Center of Animal Health, Tianjin 300381, China
| | - Yu-Jin Gao
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, China
| | - Xiu-Li Li
- Institute of Agro-product Safety and Nutrition, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China
| | - Li Zhang
- Tianjin Key Laboratory of Animal Molecular Breeding and Biotechnology, Institute of Animal Science and Veterinary, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China; Tianjin Observation and Experimental Site of National Animal Health, Tianjin 300381, China; National Data Center of Animal Health, Tianjin 300381, China
| | - Hong-Qing Zheng
- Key Laboratory of Animal Epidemic Disease Diagnostic Laboratory of Molecular Biology in Xianyang City, Institute of Animal Husbandry and Veterinary Medicine, Xianyang Vocational Technical College, Xianyang, Shaanxi 712000, China
| | - Li-Li Wang
- Tianjin Key Laboratory of Animal Molecular Breeding and Biotechnology, Institute of Animal Science and Veterinary, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China; Tianjin Observation and Experimental Site of National Animal Health, Tianjin 300381, China; National Data Center of Animal Health, Tianjin 300381, China
| | - Chao Lu
- Tianjin Key Laboratory of Animal Molecular Breeding and Biotechnology, Institute of Animal Science and Veterinary, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China; Tianjin Observation and Experimental Site of National Animal Health, Tianjin 300381, China; National Data Center of Animal Health, Tianjin 300381, China
| | - Xiang-Xue Tian
- Tianjin Key Laboratory of Animal Molecular Breeding and Biotechnology, Institute of Animal Science and Veterinary, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China; Tianjin Observation and Experimental Site of National Animal Health, Tianjin 300381, China; National Data Center of Animal Health, Tianjin 300381, China
| | - Ming-Hua Yan
- Tianjin Key Laboratory of Animal Molecular Breeding and Biotechnology, Institute of Animal Science and Veterinary, Tianjin Academy of Agricultural Sciences, Tianjin 300381, China; Tianjin Observation and Experimental Site of National Animal Health, Tianjin 300381, China; National Data Center of Animal Health, Tianjin 300381, China.
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Interaction Interface of Mason-Pfizer Monkey Virus Matrix and Envelope Proteins. J Virol 2020; 94:JVI.01146-20. [PMID: 32796061 DOI: 10.1128/jvi.01146-20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/03/2020] [Indexed: 02/06/2023] Open
Abstract
Retroviral envelope glycoprotein (Env) is essential for the specific recognition of the host cell and the initial phase of infection. As reported for human immunodeficiency virus (HIV), the recruitment of Env into a retroviral membrane envelope is mediated through its interaction with a Gag polyprotein precursor of structural proteins. This interaction, occurring between the matrix domain (MA) of Gag and the cytoplasmic tail (CT) of the transmembrane domain of Env, takes place at the host cell plasma membrane. To determine whether the MA of Mason-Pfizer monkey virus (M-PMV) also interacts directly with the CT of Env, we mimicked the in vivo conditions in an in vitro experiment by using a CT in its physiological trimeric conformation mediated by the trimerization motif of the GCN4 yeast transcription factor. The MA protein was used at the concentration shifting the equilibrium to its trimeric form. The direct interaction between MA and CT was confirmed by a pulldown assay. Through the combination of nuclear magnetic resonance (NMR) spectroscopy and protein cross-linking followed by mass spectrometry analysis, the residues involved in mutual interactions were determined. NMR has shown that the C terminus of the CT is bound to the C-terminal part of MA. In addition, protein cross-linking confirmed the close proximity of the N-terminal part of CT and the N terminus of MA, which is enabled in vivo by their location at the membrane. These results are in agreement with the previously determined orientation of MA on the membrane and support the already observed mechanisms of M-PMV virus-like particle transport and budding.IMPORTANCE By a combination of nuclear magnetic resonance (NMR) and mass spectroscopy of cross-linked peptides, we show that in contrast to human immunodeficiency virus type 1 (HIV-1), the C-terminal residues of the unstructured cytoplasmic tail of Mason-Pfizer monkey virus (M-PMV) Env interact with the matrix domain (MA). Based on biochemical data and molecular modeling, we propose that individual cytoplasmic tail (CT) monomers of a trimeric complex bind MA molecules belonging to different neighboring trimers, which may stabilize the MA orientation at the membrane by the formation of a membrane-bound net of interlinked Gag and CT trimers. This also corresponds with the concept that the membrane-bound MA of Gag recruits Env through interaction with the full-length CT, while CT truncation during maturation attenuates the interaction to facilitate uncoating. We propose a model suggesting different arrangements of MA-CT complexes between a D-type and C-type retroviruses with short and long CTs, respectively.
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Hejnar J, Ruml T. The Current View of Retroviruses as Seen from the Shoulders of a Giant. Viruses 2019; 11:v11090828. [PMID: 31491994 PMCID: PMC6784152 DOI: 10.3390/v11090828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 11/16/2022] Open
Abstract
It has now been more than two years since we said our last goodbye to Jan Svoboda (14 [...].
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Affiliation(s)
- Jiří Hejnar
- Department of Viral and Cellular Genetics, Institute of Molecular Genetics of the Czech Academy of Sciences, Videnska 1083, CZ-14220 Prague, Czech Republic.
| | - Tomáš Ruml
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, CZ-166 28 Prague, Czech Republic.
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