title: The nucleotide sequences of the 5S rRNAs of four mushrooms and their use in studying the phylogenetic position of basidiomycetes among the eukaryotes.
abstract: The nucleotide sequences of the 5 S ribosomal RNAs of the mushrooms Russula cyanoxantha, Pleurotus ostreatus, Agaricus edulis, and Auricularia auricula-judae were determined. The sequences fit in a universal five-helix secondary structure model for 5 S RNA. As in most other 5 S RNAs, some helical areas contain non-standard base pairs. A clustering method was used to reconstruct an evolutionary tree from 82 eukaryotic 5 S RNA sequences. It allows to make a choice between alternative systematic classifications for basidiomycetes and reveals that the fungal kingdom is highly polyphyletic.
mesh_terms: D001483:Base Sequence; D001487:Basidiomycota / Q000235:genetics*; D005075:Biological Evolution; D005057:Eukaryotic Cells / Q000502:physiology; D009690:Nucleic Acid Conformation; D012335:RNA, Ribosomal / Q000235:genetics*
chemical_list: D012335:RNA, Ribosomal