کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6142389 1594367 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of the Pepino mosaic virus 3′-untranslated region elements in negative-strand RNA synthesis in vitro
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی ویروس شناسی
پیش نمایش صفحه اول مقاله
Role of the Pepino mosaic virus 3′-untranslated region elements in negative-strand RNA synthesis in vitro
چکیده انگلیسی
Pepino mosaic virus (PepMV) is a mechanically-transmitted positive-strand RNA potexvirus, with a 6410 nt long single-stranded (ss) RNA genome flanked by a 5′-methylguanosine cap and a 3′ poly-A tail. Computer-assisted folding of the 64 nt long PepMV 3′-untranslated region (UTR) resulted in the prediction of three stem-loop structures (hp1, hp2, and hp3 in the 3′-5′ direction). The importance of these structures and/or sequences for promotion of negative-strand RNA synthesis and binding to the RNA dependent RNA polymerase (RdRp) was tested in vitro using a specific RdRp assay. Hp1, which is highly variable among different PepMV isolates, appeared dispensable for negative-strand synthesis. Hp2, which is characterized by a large U-rich loop, tolerated base-pair changes in its stem as long as they maintained the stem integrity but was very sensitive to changes in the U-rich loop. Hp3, which harbours the conserved potexvirus ACUUAA hexamer motif, was essential for template activity. Template-RNA polymerase binding competition experiments showed that the ACUUAA sequence represents a high-affinity RdRp binding element.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Virus Research - Volume 190, 22 September 2014, Pages 110-117
نویسندگان
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