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Med."],"published-print":{"date-parts":[[2026,8,12]]},"abstract":"<jats:p>Assembly of flaviviruses such as Zika virus (ZIKV), dengue virus, and West Nile virus in the host cell endoplasmic reticulum is driven by the structural envelope (E) and premembrane (prM) proteins. The formation of an infectious virion requires cleavage of prM by the host furin protease during a maturation step that is dependent on a conformational change in virion structure. Here, we demonstrate that the biogenesis of flavivirus particles does not require an intact prM protein or proteolytic activation. The expression of E protein preceded by a truncated version of prM (M-E) was sufficient for the formation of noninfectious ZIKV subviral particles and pseudo-infectious reporter virions. Subviral particles encoded by a ZIKV M-E DNA vaccine elicited a neutralizing antibody response in macaques that was insensitive to the virion maturation state, a feature of flavivirus humoral immunity shown to correlate with protection. M-E vaccines that uniformly present structural features shared with mature virions offer a higher-quality and more broadly applicable approach for vaccination against flaviviruses.<\/jats:p>","DOI":"10.1126\/scitranslmed.ads8464","type":"journal-article","created":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T17:58:18Z","timestamp":1786557498000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["Full-length premembrane protein is not required for mature Zika virus particle assembly"],"prefix":"10.1126","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3641-6852","authenticated-orcid":true,"given":"Kimberly A.","family":"Dowd","sequence":"first","affiliation":[{"name":"Vaccine Research Center, NIAID, NIH, Bethesda, MD 20892, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michelle","family":"Schroeder","sequence":"additional","affiliation":[{"name":"Vaccine Research Center, 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