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Nucleic Acids Research, 1983, Vol. 11, No. 3 893-900
© 1983

MOLECULAR BIOLOGY

Consensus structure and evolution of 5S rRNA*

Hans Kuntzel, Birgit Piechulla and Ulrich Hahan+

Max-Planck-Institut for expermentelle Medizin, Abteilung Chemie, Hermanm-Rein-Str. 3 D-3400 Gottingen, FRG

Received November 23, 1982. Revised January 5, 1983. Accepted January 5, 1983.

A consensus structure model of 5S rRNA presenting all conserved nucleotides In fixed positions has been deduced from the primary and secondary structure of 71 eubacterial, archaebacterial, eukaryotic cytosolic and organellar molecules. Phylogenetically related groups of molecules are characterized by nucleotide deletions in helices III, IV and V, and by potential base pair interactions in helix IV. The group-specific deletions are correlated with the early branching pattern of a dendrogram calculated from nucleotide substitution data: the first major division separates the group of eubacterial and organellar molecules from a second group containing the common ancestors of archaebacterial and eukaryotic/cytosolic molecules. The earliest diverging branch of the eubacterial/organellar group includes molecules from Thermus thermophllus, T. aquaticus, Rhodospirilium rubrum, Paracoccus denitrifioans and wheat mitochondria.

*Dedicated to Friedrich Cramer on the occasion of his sixtieth birthday

+Present address: Institut for Kristallographie, Freie Universitat 1000 Berlin ,33,FRG


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