title: cDNA cloning and nucleotide sequence of the wheat streak mosaic virus capsid protein gene.
abstract: The 3'-terminal region of wheat streak mosaic virus (WSMV) genomic RNA was cloned and a cDNA sequence of 1809 nucleotides upstream of the poly(A) tract was determined. The sequence contains a single open reading frame of 1662 nucleotides and a 3' untranslated region of 147 nucleotides. Translation products from WSMV RNA and WSMV cDNA transcripts were immunoprecipitated by WSMV capsid protein antiserum, indicating that the 3'-terminal region of WSMV RNA encodes the capsid protein. Five potential N-terminal capsid protein protease cleavage sites were identified, which would yield proteins ranging from 31.7K to 46.8K. Alignment of the deduced amino acid sequence of the WSMV capsid protein with those of other potyviruses showed significant, but limited, identity as compared to the alignment of two or more aphid-transmitted potyviruses. Although WSMV has characteristics distinct from potyviruses, because of its particle morphology, translation strategy apparently based on polyprotein processing, the ability to form cytoplasmic cylindrical inclusions and the degree of capsid protein homology with aphid-transmitted potyviruses, it should be considered a member of the potyvirus group.
authors.affiliation: Plant Pathology Department, University of Florida, Gainesville 32611.
authors.forename: C L
authors.initials: CL
authors.lastname: Niblett
authors.forename: K R
authors.initials: KR
authors.lastname: Zagula
authors.forename: L A
authors.initials: LA
authors.lastname: Calvert
authors.forename: T L
authors.initials: TL
authors.lastname: Kendall
authors.forename: D M
authors.initials: DM
authors.lastname: Stark
authors.forename: C E
authors.initials: CE
authors.lastname: Smith
authors.forename: R N
authors.initials: RN
authors.lastname: Beachy
authors.forename: S A
authors.initials: SA
authors.lastname: Lommel
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002213:Capsid / Q000737:chemistry / Q000235:genetics*; D003001:Cloning, Molecular; D004279:DNA, Viral / Q000737:chemistry*; D004591:Electrophoresis, Polyacrylamide Gel; D008969:Molecular Sequence Data; D009029:Mosaic Viruses / Q000032:analysis / Q000235:genetics*; D011233:Precipitin Tests; D014176:Protein Biosynthesis; D012367:RNA, Viral / Q000737:chemistry*; D016415:Sequence Alignment; D014158:Transcription, Genetic; D014771:Virion / Q000032:analysis / Q000235:genetics
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral