title: Structure of ribgrass mosaic virus at 2.9 A resolution: evolution and taxonomy of tobamoviruses.
abstract: Ribgrass mosaic virus (RMV) is a member of the tobamovirus group of plant viruses. The structure has been determined at 2.9 A resolution by fiber diffraction methods, and refined by molecular dynamics methods to an R-factor of 0.095. The carboxyl-carboxylate interactions that drive disassembly in tobamoviruses are present in RMV, but are very different from those in other tobamoviruses. RMV has some of the structural features of a subgroup I tobamovirus, a smaller number from subgroup II, and a number that appear to be unique to the RMV cluster of viruses. The structural studies confirm the evolutionary and taxonomic separation of the RMV cluster from both subgroup I and subgroup II tobamoviruses.
authors.affiliation: Department of Molecular Biology, Vanderbilt University, Nashville, Tennessee 37235, USA.
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: J N
authors.initials: JN
authors.lastname: Culver
authors.forename: G
authors.initials: G
authors.lastname: Stubbs
mesh_terms: D000595:Amino Acid Sequence; D005075:Biological Evolution; D002213:Capsid / Q000235:genetics / Q000648:ultrastructure*; D008958:Models, Molecular; D008969:Molecular Sequence Data; D011485:Protein Binding; D016601:RNA-Binding Proteins / Q000235:genetics / Q000648:ultrastructure*; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D017898:Tobamovirus / Q000145:classification* / Q000235:genetics / Q000648:ultrastructure*
chemical_list: D016601:RNA-Binding Proteins