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Unusual 5 S ribosomal RNAs
Author(s) -
Delihas Nicolas
Publication year - 1987
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(87)80923-7
Subject(s) - biology , ribosomal rna , chloroplast , chloroplast dna , sequence (biology) , genetics , phylogenetic tree , rna , nucleic acid sequence , dna , microbiology and biotechnology , gene
Sequence comparisons of 5 S and other ribosomal RNAs by segments can be useful in understanding anomalous primary and secondary structures and in assessing phylogenetic relationships. In a segmented analysis, the 5′‐half of the Chlamydomonas reinhardii chloroplast 5 S ribosomal RNA is found to have a very close sequence homology to the green plant chloroplast and cyanobacterial 5 S RNAs; however, the 3′‐half has a highly unusual sequence. Further comparisons of homologies between regions of the 5 S RNAs from C. reinhardii and the green plant chloroplasts suggest that genetic rearrangements within the 5 S DNA may have produced the unusual sequence at the 3′‐half. Segmented analyses of the C. reinhardii and green plant chloroplast 5 S RNAs suggest a close relationship which is not revealed by overall sequence comparisons.