The 5S ribosomal RNA sequences of a red algal rhodoplast and a gymnosperm chloroplast. Implications for the evolution of plastids and cyanobacteria
| Autor: | Rupert De Wachter, Peter Willekens, Yves Van de Peer, Antoon Vandenberghe, Hilde Van den Eynde, Els De Roeck, Raymond De Baere |
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| Rok vydání: | 1988 |
| Předmět: |
Cyanobacteria
Symbiogenesis Chloroplasts Base Sequence Endosymbiosis Molecular Sequence Data RNA Ribosomal 5S Plants Biology Ribosomal RNA biology.organism_classification Biological Evolution Chloroplast 5S ribosomal RNA Species Specificity Chloroplast DNA RNA Ribosomal Rhodophyta Botany Genetics Nucleic Acid Conformation Plastid Molecular Biology Ecology Evolution Behavior and Systematics |
| Zdroj: | Journal of Molecular Evolution. 27:126-132 |
| ISSN: | 1432-1432 0022-2844 |
| DOI: | 10.1007/bf02138372 |
| Popis: | The 5S ribosomal RNA sequences have been determined for the rhodoplast of the red alga Porphyra umbilicalis and the chloroplast of the conifer Juniperus media. The 5S RNA sequence of the Vicia faba chloroplast is corrected with respect to a previous report. A survey of the known sequences and secondary structures of 5S RNAs from plastids and cyanobacteria shows a close structural similarity between all 5S RNAs from land plant chloroplasts. The algal plastid 5S RNAs on the other hand show much more structural diversity and have certain structural features in common with bacterial 5S RNAs. A dendrogram constructed from the aligned sequences by a clustering algorithm points to a common ancestor for the present-living cyanobacteria and the land plant plastids. However, the algal plastids branch off at an early stage within the plastid-cyanobacteria cluster, before the divergence between cyanobacteria and land plant chloroplasts. This evolutionary picture points to the occurrence of multiple endosymbiotic events, with the ancestors of the present algal plastids already established as photosynthetic endosymbionts at a time when the ancestors of the present land plant chloroplasts were still free-living cells. |
| Databáze: | OpenAIRE |
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