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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/29428

Title: Polycistronic mRNAs and internal ribosome entry site elements (IRES) are widely used by white spot syndrome virus (WSSV) structural protein genes
Authors: Shih-Ting Kang;Jiann-Horng Leu;Han-Ching Wang;Li-Li Chen;Guang-Hsiung Kou;Chu-Fang Lo
Contributors: NTOU:Institute of Marine Biology
國立臺灣海洋大學:海洋生物研究所
Keywords: Polycistronic mRNA;IRES;WSSV;Gene cluster;Penaeus monodon
Date: 2009-05-10
Issue Date: 2011-10-21T03:05:55Z
Publisher: Virology
Abstract: Abstract:The genome of the white spot syndrome virus (WSSV) Taiwan isolate has many structural and non-structural genes that are arranged in clusters. Screening with Northern blots showed that at least four of these clusters produce polycistronic mRNA, and one of these (vp31/vp39b/vp11) was studied in detail. The vp31/vp39b/vp11 cluster produces two transcripts, including a large 3.4-kb polycistronic transcript of all three genes. No monocistronic vp39b mRNA was detected. TNT and in vitro translation assays showed that vp39b translation was independent of vp31 translation, and that ribosomal reinitiation was not a possible mechanism for vp39b. An unusually located IRES (internal ribosome entry site) element was identified in the vp31/vp39b coding region, and this region was able to promote the expression of a downstream firefly luciferase reporter. We show that vp31/vp39b/vp11 is representative of many other WSSV structural/non-structural gene clusters, and argue that these are also likely to produce polycistronic mRNAs and that use an IRES mechanism to regulate their translation.
Relation: 387(2), pp.353–363
URI: http://ntour.ntou.edu.tw/handle/987654321/29428
Appears in Collections:[海洋生物研究所] 期刊論文

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