{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T00:04:31Z","timestamp":1761523471764},"reference-count":41,"publisher":"American Society for Microbiology","issue":"19","license":[{"start":{"date-parts":[[2002,10,1]],"date-time":"2002-10-01T00:00:00Z","timestamp":1033430400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["J Virol"],"published-print":{"date-parts":[[2002,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>The secondary structures predicted for the enteroviral 3\u2032 nontranslated region (3\u2032NTR) all seem to indicate a conformation consisting of two (X and Y) hairpin structures. The higher-order RNA structure of the 3\u2032NTR appears to exist as an intramolecular kissing interaction between the loops of these two hairpin structures. The enterovirus B-like subgroup possesses an additional stem-loop structure, domain Z, which is not present in the poliovirus-like enteroviruses. It has been suggested that the Z domain originated from a burst of short sequence repetitions (E. V. Pilipenko, S. V. Maslova, A. N. Sinyakov, and V. I. Agol, Nucleic Acids Res. 20:1739-1745, 1992). However, no functional features have yet been ascribed to this enterovirus B-like-specific RNA element in the 3\u2032NTR. In this study, we tested the functional characteristics and biological significance of domain Z. A mutant of the cardiovirulent coxsackievirus group B3 strain Nancy which completely lacked the Z domain and which therefore acquired enterovirus C-like secondary structures exhibited a wild-type growth phenotype, as determined by single-cycle growth analysis with BGM cells. This result proves that the Z domain is virtually dispensable for viral growth in tissue cultures. Partial distortion of the Z domain structure resulted in a disabled virus with reduced growth kinetics, probably due to alternative conformations of the overall structure of the domain. Infection of mice showed that the recombinant coxsackievirus group B3 mutant which completely lacked the Z domain was less virulent. Pancreatic tissues from mice infected with wild-type virus and recombinant virus were equally affected. However, the heart tissue from mice infected with the recombinant virus showed only slight signs of myocarditis. These results suggest that the enterovirus B-like-specific Z domain plays a role in coxsackievirus-induced pathogenesis.<\/jats:p>","DOI":"10.1128\/jvi.76.19.9900-9909.2002","type":"journal-article","created":{"date-parts":[[2002,9,3]],"date-time":"2002-09-03T23:18:19Z","timestamp":1031095099000},"page":"9900-9909","update-policy":"http:\/\/dx.doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":40,"title":["Biological Significance of a Human Enterovirus B-Specific RNA Element in the 3\u2032 Nontranslated Region"],"prefix":"10.1128","volume":"76","author":[{"given":"Ingrid","family":"Merkle","sequence":"first","affiliation":[{"name":"Institute of Virology, Friedrich Schiller University, D-07745 Jena, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark J. 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