1
|
Yu L, Liu X, Wei X, Ren J, Wang X, Wu S, Lan K. C1QTNF5 is a novel attachment factor that facilitates the entry of influenza A virus. Virol Sin 2024; 39:277-289. [PMID: 38246238 PMCID: PMC11074642 DOI: 10.1016/j.virs.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 01/16/2024] [Indexed: 01/23/2024] Open
Abstract
Influenza A virus (IAV) binds sialic acid receptors on the cell surface to enter the host cells, which is the key step in initiating infection, transmission and pathogenesis. Understanding the factors that contribute to the highly efficient entry of IAV into human cells will help elucidate the mechanism of viral entry and pathogenicity, and provide new targets for intervention. In the present study, we reported a novel membrane protein, C1QTNF5, which binds to the hemagglutinin protein of IAV and promotes IAV infection in vitro and in vivo. We found that the HA1 region of IAV hemagglutinin is critical for the interaction with C1QTNF5 protein, and C1QTNF5 interacts with hemagglutinin mainly through its N-terminus (1-103 aa). In addition, we further demonstrated that overexpression of C1QTNF5 promotes IAV entry, while blocking the interaction between C1QTNF5 and IAV hemagglutinin greatly inhibits viral entry. However, C1QTNF5 does not function as a receptor to mediate IAV infection in sialic acid-deficient CHO-Lec2 cells, but promotes IAV to attach to these cells, suggesting that C1QTNF5 is an important attachment factor for IAV. This work reveals C1QTNF5 as a novel IAV attachment factor and provides a new perspective for antiviral strategies.
Collapse
Affiliation(s)
- Lei Yu
- State Key Laboratory of Virology, Medical Research Institute, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Xinjin Liu
- State Key Laboratory of Virology, Medical Research Institute, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Xiaoqin Wei
- State Key Laboratory of Virology, Medical Research Institute, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Junrui Ren
- State Key Laboratory of Virology, Medical Research Institute, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Xueyun Wang
- State Key Laboratory of Virology, Medical Research Institute, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Shuwen Wu
- State Key Laboratory of Virology, Medical Research Institute, College of Life Sciences, Wuhan University, Wuhan, 430072, China.
| | - Ke Lan
- State Key Laboratory of Virology, Medical Research Institute, College of Life Sciences, Wuhan University, Wuhan, 430072, China; Frontier Science Center for Immunology and Metabolism, Wuhan University, Wuhan, 430072, China; Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan, 430072, China.
| |
Collapse
|