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The nucleotide sequence of satellite tobacco necrosis virus strain C and helper-assisted replication of wild-type and mutant clones of the virus

DH Bringloe, AP Gultyaev, M Pelpel, CW Pleij and RH Coutts Biology Department, Imperial College of Science, Technology and Medicine, London, UK. The complete nucleotide sequence of satellite tobacco necrosis virus strain C (STNV-C) was determined. The genome has a similar overall organization to two...

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Published in:Journal of general virology 1998-06, Vol.79 (6), p.1539-1546
Main Authors: Bringloe, DH, Gultyaev, AP, Pelpel, M, Pleij, CW, Coutts, RH
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Coutts, RH
description DH Bringloe, AP Gultyaev, M Pelpel, CW Pleij and RH Coutts Biology Department, Imperial College of Science, Technology and Medicine, London, UK. The complete nucleotide sequence of satellite tobacco necrosis virus strain C (STNV-C) was determined. The genome has a similar overall organization to two STNV isolates studied previously but differs significantly from them in the secondary structure of the translated and untranslated regions (UTRs). STNV-C RNA is naturally uncapped and contains 1221 nt: 101 nt in the 5' UTR, 606 nt in the capsid protein (CP) coding region and 514 nt in the 3' UTR. Using the known sequences of STNV-C and tobacco necrosis virus strain D (TNV-D) RNAs, full-length cDNA clones of both RNAs were constructed. Synthetic transcripts derived from STNV-C cDNA clones only replicated in plants and protoplasts when co-inoculated with TNV-D transcripts. A number of mutant clones in both the 3' and the 5' STNV-C RNA UTRs were constructed which disrupted putative cis-acting elements recognized by helper virus polymerase. Deletion analysis revealed an essential requirement of all 3' and 5' proximal sequences in the STNV-C UTRs for replication. However, an internal region in the 3' UTR could be deleted without loss of infectivity. Likewise, the entire STNV-C CP-encoding region could be deleted and replaced with a marker gene of a similar size without loss of transcript accumulation in plants.
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The complete nucleotide sequence of satellite tobacco necrosis virus strain C (STNV-C) was determined. The genome has a similar overall organization to two STNV isolates studied previously but differs significantly from them in the secondary structure of the translated and untranslated regions (UTRs). STNV-C RNA is naturally uncapped and contains 1221 nt: 101 nt in the 5' UTR, 606 nt in the capsid protein (CP) coding region and 514 nt in the 3' UTR. Using the known sequences of STNV-C and tobacco necrosis virus strain D (TNV-D) RNAs, full-length cDNA clones of both RNAs were constructed. Synthetic transcripts derived from STNV-C cDNA clones only replicated in plants and protoplasts when co-inoculated with TNV-D transcripts. A number of mutant clones in both the 3' and the 5' STNV-C RNA UTRs were constructed which disrupted putative cis-acting elements recognized by helper virus polymerase. 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The complete nucleotide sequence of satellite tobacco necrosis virus strain C (STNV-C) was determined. The genome has a similar overall organization to two STNV isolates studied previously but differs significantly from them in the secondary structure of the translated and untranslated regions (UTRs). STNV-C RNA is naturally uncapped and contains 1221 nt: 101 nt in the 5' UTR, 606 nt in the capsid protein (CP) coding region and 514 nt in the 3' UTR. Using the known sequences of STNV-C and tobacco necrosis virus strain D (TNV-D) RNAs, full-length cDNA clones of both RNAs were constructed. Synthetic transcripts derived from STNV-C cDNA clones only replicated in plants and protoplasts when co-inoculated with TNV-D transcripts. A number of mutant clones in both the 3' and the 5' STNV-C RNA UTRs were constructed which disrupted putative cis-acting elements recognized by helper virus polymerase. Deletion analysis revealed an essential requirement of all 3' and 5' proximal sequences in the STNV-C UTRs for replication. However, an internal region in the 3' UTR could be deleted without loss of infectivity. 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The complete nucleotide sequence of satellite tobacco necrosis virus strain C (STNV-C) was determined. The genome has a similar overall organization to two STNV isolates studied previously but differs significantly from them in the secondary structure of the translated and untranslated regions (UTRs). STNV-C RNA is naturally uncapped and contains 1221 nt: 101 nt in the 5' UTR, 606 nt in the capsid protein (CP) coding region and 514 nt in the 3' UTR. Using the known sequences of STNV-C and tobacco necrosis virus strain D (TNV-D) RNAs, full-length cDNA clones of both RNAs were constructed. Synthetic transcripts derived from STNV-C cDNA clones only replicated in plants and protoplasts when co-inoculated with TNV-D transcripts. A number of mutant clones in both the 3' and the 5' STNV-C RNA UTRs were constructed which disrupted putative cis-acting elements recognized by helper virus polymerase. Deletion analysis revealed an essential requirement of all 3' and 5' proximal sequences in the STNV-C UTRs for replication. However, an internal region in the 3' UTR could be deleted without loss of infectivity. Likewise, the entire STNV-C CP-encoding region could be deleted and replaced with a marker gene of a similar size without loss of transcript accumulation in plants.</abstract><cop>England</cop><pub>Soc General Microbiol</pub><pmid>9634099</pmid><doi>10.1099/0022-1317-79-6-1539</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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source Freely Accessible Science Journals - check A-Z of ejournals
subjects Base Sequence
DNA, Viral
Helper Viruses - genetics
Helper Viruses - physiology
Molecular Sequence Data
Mutation
Nicotiana - virology
Nucleic Acid Conformation
Plants, Toxic
RNA, Viral - chemistry
Satellite Viruses - genetics
Satellite Viruses - physiology
Sequence Analysis, RNA
Virus Replication
title The nucleotide sequence of satellite tobacco necrosis virus strain C and helper-assisted replication of wild-type and mutant clones of the virus
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