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This study identifies RPL35 as a host antiviral protein that targets FMDV. Further mechanistic investigations demonstrate that RPL35 directly interacts with the FMDV structural protein VP2, mediating its K48-linked polyubiquitination and subsequent degradation. The Lys217 residue of VP2 is critical for RPL35\u2019s antiviral activity, as evidenced by the increased viral virulence observed with the rO-VP2K217R mutant virus. Through an unbiased proteomic screen, we revealed that RPL35 recruits the E3 ligase AMFR to ubiquitinate and degrade VP2. Additionally, FMDV induces the degradation of KPNA3, thereby blocking RPL35\u2019s nuclear translocation. This study advances our understanding of host-virus interactions and provides new insights into developing antiviral drugs targeting the ubiquitin-proteasome pathway.<\/jats:p>\n                    <jats:sec>\n                      <jats:title>IMPORTANCE<\/jats:title>\n                      <jats:p>This investigation elucidated the antiviral role of RPL35 in the context of FMDV infection. Our results indicate that RPL35 facilitates the recruitment of AMFR, which, in turn, promotes K48-linked polyubiquitination and subsequent proteasomal degradation of the viral protein VP2. This process thereby mitigates viral infection. Further analysis identified Lys217 of VP2 as a critical ubiquitination site for RPL35, with the inhibitory effect of RPL35 being abolished in the recombinant mutant virus rO-VP2K217R. Additionally, we found that FMDV induces the degradation of KPNA3, which obstructs the nuclear translocation of RPL35. Collectively, these findings suggest that RPL35 functions as a potent antiviral effector in suppressing FMDV infection.<\/jats:p>\n                    <\/jats:sec>\n                  <\/jats:sec>","DOI":"10.1128\/jvi.01453-25","type":"journal-article","created":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T13:00:26Z","timestamp":1760014826000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":2,"title":["Ribosomal protein L35 negatively regulates FMDV replication by recruiting AMFR to promote the ubiquitination and degradation of VP2"],"prefix":"10.1128","volume":"99","author":[{"given":"Wenhua","family":"Shao","sequence":"first","affiliation":[{"name":"State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou University, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences","place":["Lanzhou, China"]},{"name":"Gansu Province Research Center 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