Article ; Online: An LIR motif in the Rift Valley fever virus NSs protein is critical for the interaction with LC3 family members and inhibition of autophagy.
2024 Volume 20, Issue 3, Page(s) e1012093
Abstract: Rift Valley fever virus (RVFV) is a viral zoonosis that causes severe disease in ruminants and humans. The nonstructural small (NSs) protein is the primary virulence factor of RVFV that suppresses the host's antiviral innate immune response. ... ...
Abstract | Rift Valley fever virus (RVFV) is a viral zoonosis that causes severe disease in ruminants and humans. The nonstructural small (NSs) protein is the primary virulence factor of RVFV that suppresses the host's antiviral innate immune response. Bioinformatic analysis and AlphaFold structural modeling identified four putative LC3-interacting regions (LIR) motifs (NSs 1-4) in the RVFV NSs protein, which suggest that NSs interacts with the host LC3-family proteins. Using, isothermal titration calorimetry, X-ray crystallography, co-immunoprecipitation, and co-localization experiments, the C-terminal LIR motif (NSs4) was confirmed to interact with all six human LC3 proteins. Phenylalanine at position 261 (F261) within NSs4 was found to be critical for the interaction of NSs with LC3, retention of LC3 in the nucleus, as well as the inhibition of autophagy in RVFV infected cells. These results provide mechanistic insights into the ability of RVFV to overcome antiviral autophagy through the interaction of NSs with LC3 proteins. |
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MeSH term(s) | Animals ; Humans ; Rift Valley fever virus/metabolism ; Viral Nonstructural Proteins/metabolism ; Rift Valley Fever ; Autophagy ; Antiviral Agents/metabolism |
Chemical Substances | Viral Nonstructural Proteins ; Antiviral Agents |
Language | English |
Publishing date | 2024-03-21 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 2205412-1 |
ISSN | 1553-7374 ; 1553-7374 |
ISSN (online) | 1553-7374 |
ISSN | 1553-7374 |
DOI | 10.1371/journal.ppat.1012093 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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