Results 261 to 270 of about 69,537 (283)

Primary Structure Homology within the 23S Ribosomal RNA

Nature, 1968
OUR understanding of the evolution of the cell will depend largely on our gaining an understanding of the evolution of the cell's translation apparatus, and in this context I wish to discuss the recent finding that the RNA sequences (seen in a Tl ribonuclease digest) surrounding the methylated bases in the Escherichia coli 23S ribosomal RNA (rRNA) are ...
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Co-transcription of 16S and 23S ribosomal RNA in Escherichia coli.

Nature New Biology, 1971
IF rifampicin is added to bacteria, RNA synthesis continues only for a short time, until all RNA molecules nascent at the time of addition of rifampicin are completed1,2. At times between 0 and 60 s after addition of rifampicin, we added3H-uridine to an exponential phase culture of E.
H. Bremer, L. Berry
semanticscholar   +3 more sources

Ribosomal activity of the 16 S · 23 S RNA complex

Archives of Biochemistry and Biophysics, 1985
It has been demonstrated in this laboratory that 16 S and 23 S RNAs form a binary complex like 30 S and 50 S ribosomes under certain specific conditions, and 5 S RNA can be incorporated into the complex in stoichiometric amounts in presence of three ribosomal proteins, L5, L18, and L15/25. These studies raised the basic question of whether such complex
D P, Burma, D S, Tewari, A K, Srivastava
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Probing 23S Ribosomal RNA Cleavage Sites in Coccoid Helicobacter pylori

Helicobacter, 2001
ABSTRACTBackground.Previous studies have revealed that extensive nonrandom fragmentation of ribosomal RNA occurs during conversion of Helicobacter pylori to the coccoid form. The 16S rRNA fragmentation has been characterised in some detail. The aim of the present study was to define corresponding cleavage‐sites in the 3′‐half of the 23S rRNA molecule ...
H J, Monstein, C D, de la Cour, J, Jonasson   +2 more
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Nucleotide sequences of accessible regions of 23S RNA in 50S ribosomal subunits

Biochemistry, 1978
Nucleotide sequences around kethoxal-reactive guanine residues of 23S RNA in 50S ribosomal subunits have been determined. By use of the diagonal paper electrophoresis method )Noller, H.F. (1974), Biochemistry 13, 4694-4703), 41 ribonuclease T1 oligonucleotides, originating from about 25 sites, were identified and sequenced.
W, Herr, H F, Noller
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Thiostrepton resistance mutations in the gene for 23S ribosomal RNA of Halobacteria

Biochimie, 1987
Mutants of Halobacterium (H.) halobium and H. cutirubrum were isolated which are resistant to the 70S ribosome inhibitor thiostrepton. Using primer extension analysis, resistance was shown to correlate with base changes at position 1159, which corresponds to position 1067 of the E. coli 23S rRNA.
H, Hummel, A, Böck
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Sequence Analysis of Specific Areas of the 16S and 23S Ribosomal RNAs

Nature, 1968
These ribosomal RNAs seem to be largely homogeneous, at least with respect to the methylated sequences. Methylation is very specific and occurs at a small number of loci.
P, Fellner, F, Sanger
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Atypical Structure of the 23S Ribosomal RNA Molecule in Certain Oral Bacteria

Journal of Dental Research, 1991
Ribosomal RNA (rRNA) isolated from Wolinella recta and seven related bacteria was examined by agarose gel electrophoresis. The 23S rRNA molecule could not be detected in W. recta, Wolinella curva, Bacteroides gracilis, or Bacteroides ureolyticus. In place of the 23S molecule, there were three smaller molecules of approximately 1700, 650, and 600 bases
G J, Sunday, M J, Gillespie, S T, Motley, J J, Zambon   +3 more
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[74] Photoaffinity labeling of 23 S RNA in ribosomes

1977
Publisher Summary Photoaffinity labeling—a well known technique for studying active sites in enzymes—has attracted considerable attention as a tool to ascertain structure-function relationships in more complex biological structures, such as ribosomal binding sites or membrane receptor sites.
Ludwig Bispink, Heinrich Matthaei
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Recognition of nucleotide G745 in 23 S ribosomal RNA by the RrmA methyltransferase

Journal of Molecular Biology, 2001
Methylation of the N1 position of nucleotide G745 in hairpin 35 of Escherichia coli 23 S ribosomal RNA (rRNA) is mediated by the methyltransferase enzyme RrmA. Lack of G745 methylation results in reduced rates of protein synthesis and growth. Addition of recombinant plasmid-encoded rrmA to an rrmA-deficient strain remedies these defects.
Hansen, L H, Kirpekar, F, Douthwaite, S
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