title: Nucleotide sequence of a resistance breaking mutant of southern bean mosaic virus.
abstract: SBMV-S is a resistance-breaking mutant of an Arkansas isolate of the bean strain of southern bean mosaic virus (SBMV-BARK) that is able to move systemically in Phaseolus vulgaris cvs. Pinto and Great Northern, whereas the wild-type SBMV-BARK causes local necrotic lesions and is restricted to the inoculated leaves of these hosts. Sequence analysis of the 4136 nucleotide genomes of SBMV-BARK and SBMV-S revealed seven nucleotide differences, but only four deduced amino acid changes. A single amino acid change occurred in the C-terminal region of the putative RNA-dependent RNA polymerase and three differences were identified in the N-terminal portion of the virus coat protein. SBMV-BARK and SBMV-S were compared with other sobemoviruses and were found to contain a high level of nucleotide sequence identity (91.3%) to SBMV-B. Unlike SBMV-B however, SBMV-BARK and SBMV-S contained four putative overlapping open reading frames, making them more similar in genome organization to the cowpea strain, SBMV-C. The possibility exists that mutations or even errors, that resulted in mis-identification of open reading frames, occurred in previously published information on nucleotide sequence and genomic organization for SBMV-B.
authors.affiliation: Department of Plant Pathology, University of Arkansas, Fayetteville, USA.
authors.forename: L
authors.initials: L
authors.lastname: Lee
authors.forename: E J
authors.initials: EJ
authors.lastname: Anderson
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002213:Capsid / Q000235:genetics; D007887:Fabaceae / Q000821:virology*; D007113:Immunity, Innate / Q000235:genetics; D008969:Molecular Sequence Data; D009029:Mosaic Viruses / Q000235:genetics*; D009154:Mutation; D010935:Plant Diseases / Q000235:genetics* / Q000821:virology*; D010946:Plants, Medicinal; D012324:RNA-Dependent RNA Polymerase / Q000235:genetics
chemical_list: D012324:RNA-Dependent RNA Polymerase