Results 361 to 370 of about 1,591,440 (405)

Regulation of ribosomal RNA synthesis

Advances in Enzyme Regulation, 1969
Abstract Levorphanol, a synthetic morphine, is known as a potent inhibitor for bacterial ribosomal RNA. Spermidine has an antagonistic effect on this inhibition. The authors applied Levorphanol on the RNA synthesis in liver cells. Levorphanol specifically inhibits the nucleolar ribosomal RNA synthesis.
Yoshiaki Miura, Shigeru Sakiyama, Sadahito Usui   +2 more
openaire   +3 more sources

Ribosomal RNA Metabolism in Macrophages

1992
Macrophages are ubiquitous cells critical for host defense (Wiltrout and Varesio 1987; Varesio 1985b). Metchnikoff’s original report in the late nineteenth century first suggested that phagocytes are the body’s prime detectors of foreign invaders; the functions of macrophages have since been delineated, initially at a cellular level and more recently ...
G. L. Gusella, L. Varesio, Barbara Bottazzi, Danuta Radzioch   +3 more
openaire   +3 more sources

Structure and function of ribosomal RNA

Biochemistry and Cell Biology, 1995
A refined model has been developed for the folding of 16S rRNA in the 30S subunit, based on additional constraints obtained from new experimental approaches. One set of constraints comes from hydroxyl radical footprinting of each of the individual 30S ribosomal proteins, using free Fe2+–EDTA complex.
Harry F. Noller, Rachel Green, Gabriele Heilek, Vernita Hoffarth, Alexander Hüttenhofer, Simpson Joseph, Inho Lee, Kate Lieberman, Alexander Mankin, Chuck Merryman, Ted Powers, Elisabetta Viani Puglisi, Raymond R. Samaha, Bryn Weiser   +13 more
openaire   +3 more sources

Secondary Structure of Ribosomal RNA

Science, 1970
Infrared spectra were obtained for 16 S and for 23 S ribosomal RNA's in D 2 O solutions. The percentage of each base in the paired and unpaired regions of the RNA was determined from the spectra. The secondary structures of 16 S and 23
K. A. Hartman, G. J. Thomas
openaire   +3 more sources

Regulation of ribosomal RNA gene copy number, transcription and nucleolus organization in eukaryotes

Nature reviews. Molecular cell biology, 2023
Yutaro Hori, C. Engel, Takehiko Kobayashi   +2 more
semanticscholar   +1 more source

Ribosomal RNA synthesis in plants

Journal of Molecular Biology, 1970
Abstract The cytoplasmic ribosomal RNA's (of molecular weight 1.3 × 106 and 0.7 × 106 daltons) of higher plants arise by the selective cleavage of larger precursor molecules. The main precursor RNA species in carrot (Daucus carota) have been tentatively characterized by polyacrylamide-gel electrophoresis as having molecular weights of 2.8 × 106, 2.2 ×
Joe L. Key, C. J. Leaver
openaire   +3 more sources

Ribosomal RNA precursors in plants

Journal of Molecular Biology, 1970
Abstract A high molecular weight, rapidly-labelled ribosomal RNA precursor in the pearoot tip and in artichoke-tuber tissue is described. It has a molecular weight, determined by polyacrylamide-gel electrophoresis, of about 2.3 × 10 6 daltons. The pea precursor RNA consists of two components which can just be distinguished by gel electrophoresis ...
M.E. Rogers, Ulrich E. Loening, R.S.S. Fraser   +2 more
openaire   +3 more sources

Ribosomal RNA: the message or matrix for ribosomal proteins

Canadian Journal of Biochemistry, 1976
The known nucleotide sequence of Escherichia coli 16S ribosomal RNA has been converted to amino acid sequences in all possible ways, and compared to known ribosomal protein sequences. The degree of similarity is precisely what one would expect by chance alone, providing additional evidence that ribosomal proteins cannot be coded for by ribosomal RNA.
A. T. Matheson, L. P. Visentin, D. R. Miller   +2 more
openaire   +3 more sources

An RNA replisome as the ancestor of the ribosome

Journal of Molecular Evolution, 1991
The ribosome is proposed to have evolved from an earlier RNA-replisome, which synthesized RNA. Ancestral tRNA molecules originally were loaded with trinucleotide sequences and donated them to growing RNA chains. The enzymatic addition of the C-C-A trinucleotide to presentday transfer RNA molecules is a carryover from this function.
openaire   +3 more sources

Ribosomal RNA Phylogenies

1991
For a long time, cytochrome c, which is a slowly evolving protein, was the reference molecule to establish molecular phylogenies for very divergent eukaryotic lineages (Fitch and Margoliash 1967). Considering bacterial and chloroplastic c-type cytochomes together with cytochrome c, the first universal phylogenetic tree has been established. However, in
Michel Solignac, A. Chenuil, François Rousset, Michel Pelandakis   +3 more
openaire   +2 more sources