کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3429223 1228241 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of Wuhan Nodavirus subgenomic RNA3 and the RNAi inhibition property of its encoded protein B2
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی ویروس شناسی
پیش نمایش صفحه اول مقاله
Characterization of Wuhan Nodavirus subgenomic RNA3 and the RNAi inhibition property of its encoded protein B2
چکیده انگلیسی

Wuhan Nodavirus (WhNV) is the first reported nodavirus isolated from insect in China. The viral genome consists of two positive-strand RNA, RNA1 and RNA2. RNA1 is 3149 nucleotides in length, and contains three putative Open Reading Frames (ORFs) which encode proteins A, B1 and B2, respectively. In contrast, only one putative ORF encoding protein alpha was identified within 1562-nt-long RNA2 species. Here, we report the newly characterized molecular properties of WhNV subgenomic RNA3 and its encoded protein B2. We have successfully multiplied WhNV in the natural host Pieris rapae larvae under laboratory conditions. WhNV replication in the host cells resulted in the expression of viral proteins, ProA, B2 and Proα, with the absence of B1 production. Northern blot hybridization assay revealed the existence of subgenomic RNA3 which is 5′ capped and 3′ co-terminal with RNA1. The subgenomic RNA3 is 370 nucleotides in length and contains only one ORF (B2) with the first AUG as the authentic initiation codon. In addition, we found that nonstructural protein B2 of WhNV is an efficient RNA interference (RNAi) suppressor in a cultured drosophila cell line. The amino-terminal region (aa 1–20) of B2 is essential for this RNAi inhibition activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Virus Research - Volume 151, Issue 2, August 2010, Pages 153–161
نویسندگان
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