The complete nucleotide sequence of pepper mottle virus genomic RNA: Comparison of the encoded polyprotein with those of other sequenced potyviruses

The complete nucleotide sequence of a pepper mottle virus isolate from California (PepMoV C) has been determined from cloned viral cDNAs. The PepMoV C genomic RNA is 9640 nucleotides excluding the poly(A) tail and contains a long open reading frame starting at nucleotide 168 and potentially encoding...

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Veröffentlicht in:Virology (New York, N.Y.) N.Y.), 1992-11, Vol.191 (1), p.19-30
Hauptverfasser: Vance, Vicki Bowman, Moore, Delores, Turpen, Thomas H., Bracker, Allan, Hollowell, Victoria C.
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Moore, Delores
Turpen, Thomas H.
Bracker, Allan
Hollowell, Victoria C.
description The complete nucleotide sequence of a pepper mottle virus isolate from California (PepMoV C) has been determined from cloned viral cDNAs. The PepMoV C genomic RNA is 9640 nucleotides excluding the poly(A) tail and contains a long open reading frame starting at nucleotide 168 and potentially encoding a polyprotein of 3068 amino acids. Comparison of the PepMoV C presumptive polyprotein with those of other sequenced members of the potyvirus group, including tobacco etch virus (TEV), tobacco vein mottling virus (TVMV), plum pox virus (PPV), and potato virus Y (PVY), allowed localization of putative protein cleavage sites. A similar analysis was used to determine the position of conserved viral protein-coding regions along the viral genomic RNA. These analyses confirm previous work indicating that genome organization is conserved among members of the genus Potyvirus. The localization of one PepMoV C gene product, the nuclear inclusion body protein a (Nla protein), was analyzed by expressing PepMoV cDNA deletion clones in bacteria and assaying for appearance of mature-sized coat protein, a cleavage product of the Nla protease. Comparative sequence analyses of the putative PepMoV polyprotein with those of TEV, TVMV, PPV, and PVY served to identify regions of the potyviral polyproteins which have diverged within the genus, as well as highly conserved protein features which may play an important functional role in the potyviral life cycle.
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The PepMoV C genomic RNA is 9640 nucleotides excluding the poly(A) tail and contains a long open reading frame starting at nucleotide 168 and potentially encoding a polyprotein of 3068 amino acids. Comparison of the PepMoV C presumptive polyprotein with those of other sequenced members of the potyvirus group, including tobacco etch virus (TEV), tobacco vein mottling virus (TVMV), plum pox virus (PPV), and potato virus Y (PVY), allowed localization of putative protein cleavage sites. A similar analysis was used to determine the position of conserved viral protein-coding regions along the viral genomic RNA. These analyses confirm previous work indicating that genome organization is conserved among members of the genus Potyvirus. The localization of one PepMoV C gene product, the nuclear inclusion body protein a (Nla protein), was analyzed by expressing PepMoV cDNA deletion clones in bacteria and assaying for appearance of mature-sized coat protein, a cleavage product of the Nla protease. Comparative sequence analyses of the putative PepMoV polyprotein with those of TEV, TVMV, PPV, and PVY served to identify regions of the potyviral polyproteins which have diverged within the genus, as well as highly conserved protein features which may play an important functional role in the potyviral life cycle.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><pmid>1413501</pmid><doi>10.1016/0042-6822(92)90162-I</doi><tpages>12</tpages></addata></record>
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source MEDLINE; Elsevier ScienceDirect Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects Amino Acid Sequence
ARN
Base Sequence
Biological and medical sciences
Endopeptidases - metabolism
Fundamental and applied biological sciences. Psychology
Genetics
GENOMAS
GENOME
Genome, Viral
Microbiology
Molecular Sequence Data
NUCLEOTIDE
NUCLEOTIDOS
Open Reading Frames
Plant Viruses - genetics
plum pox virus
POTYVIRUS
PROTEINAS
PROTEINE
RNA, Viral - genetics
Sequence Homology, Amino Acid
tobacco etch virus
tobacco vein mottling virus
Viral Proteins - genetics
Viral Proteins - metabolism
Virology
VIRUS DE LAS PLANTAS
VIRUS DES VEGETAUX
title The complete nucleotide sequence of pepper mottle virus genomic RNA: Comparison of the encoded polyprotein with those of other sequenced potyviruses
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