title: Molecular analysis of the genome segments S1, S4, S6, S7 and S12 of a Rice gall dwarf virus isolate from Thailand; completion of the genomic sequence.
abstract: The complete nucleotide sequences of the double-stranded RNA segments S1, S4, S6, S7 and S12 of the genome of a Rice gall dwarf virus (RGDV) isolate from Thailand were determined. The segments consisted of 4505, 2622, 1648, 1652 and 853 nucleotides, encoding putative proteins of 1458, 725, 489, 511 and 206 amino acids with molecular masses of approximately 166, 80, 53, 59 and 24 kDa, respectively. Homology searches indicated that each of the putative proteins has a counterpart in isolates of Rice dwarf virus (RDV) and Wound tumor virus, two other species in the genus Phytoreovirus. However, no similarities were found to other registered sequences, including those of other viruses that belong to the family Reoviridae. The identities between homologous structural proteins of RGDV and RDV ranged from 34 to 51% and were thus higher than those between homologous non-structural proteins of RGDV and RDV (16-37%). Among the nonstructural proteins, the highest amino acid sequence identity (37%) was observed for RGDV Pns11 and RDV Pns10, a constituent of tubular inclusions. This observation suggests that a specific amino acid backbone might be required for maintaining not only the three-dimensional structure of virions but also that of inclusions. The entire sequence of the RGDV genome is now available.
authors.affiliation: National Agricultural Research Center, Tsukuba, Ibaraki, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Moriyasu
authors.forename: W
authors.initials: W
authors.lastname: Maruyama-Funatsuki
authors.forename: A
authors.initials: A
authors.lastname: Kikuchi
authors.forename: K
authors.initials: K
authors.lastname: Ichimi
authors.forename: B
authors.initials: B
authors.lastname: Zhong
authors.forename: J
authors.initials: J
authors.lastname: Yan
authors.forename: Y
authors.initials: Y
authors.lastname: Zhu
authors.forename: H
authors.initials: H
authors.lastname: Suga
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
authors.forename: T
authors.initials: T
authors.lastname: Ichiki-Uehara
authors.forename: T
authors.initials: T
authors.lastname: Shimizu
authors.forename: K
authors.initials: K
authors.lastname: Hagiwara
authors.forename: H
authors.initials: H
authors.lastname: Kamiunten
authors.forename: K
authors.initials: K
authors.lastname: Akutsu
authors.forename: T
authors.initials: T
authors.lastname: Omura
mesh_terms: D020413:3' Untranslated Regions; D020121:5' Untranslated Regions; D000595:Amino Acid Sequence; D001483:Base Sequence; D016679:Genome, Viral; D008969:Molecular Sequence Data; D012275:Oryza / Q000821:virology*; D010935:Plant Diseases / Q000821:virology; D012087:Reoviridae / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity; D013785:Thailand; D014764:Viral Proteins / Q000235:genetics
chemical_list: D020413:3' Untranslated Regions; D020121:5' Untranslated Regions; D014764:Viral Proteins