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Ribosomal RNA synthesis in plants
Journal of Molecular Biology, 1970Abstract 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
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Ribosomal RNA precursors in plants
Journal of Molecular Biology, 1970Abstract 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 +2 more
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Incorporating activity of ribosomes and integrity of ribosomal RNA
Biochemical and Biophysical Research Communications, 1970Abstract The interrelationship between the amino acid incorporating ability and the state of ribosomal-RNA in ribonuclease treated rat liver ribosomes was studied. It was shown that ribosomes containing no or only negligible amounts of 28 S ribosomal-RNA retained at least 30 per cent of their original incorporating activity /measured without addition
L. Vereczkey, P. Hüvös, O. Gaál
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Ribosomal RNA: the message or matrix for ribosomal proteins
Canadian Journal of Biochemistry, 1976The 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 +2 more
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An RNA replisome as the ancestor of the ribosome
Journal of Molecular Evolution, 1991The 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.
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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 +3 more
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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 +3 more
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RNA Structure: Reading the Ribosome
Science, 2005The crystal structures of the ribosome and its subunits have increased the amount of information about RNA structure by about two orders of magnitude. This is leading to an understanding of the principles of RNA folding and of the molecular interactions that underlie the functional capabilities of the ribosome and other RNA systems.
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Trends in Cell Biology, 1998
Abstract SEITHER, P., IBEN, S. and GRUMMT, I. (1998) Mammalian RNA polymerase I exists as a holoenzyme with associated basal transcription factors J. Mol. Biol .
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Abstract SEITHER, P., IBEN, S. and GRUMMT, I. (1998) Mammalian RNA polymerase I exists as a holoenzyme with associated basal transcription factors J. Mol. Biol .
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Organelle origins and ribosomal RNA
Biochemistry and Cell Biology, 1988As the detailed molecular biology of organelle genomes has unfolded, there has been a general acceptance of the view that plastids and mitochondria are of endosymbiotic, eubacterial origin. Plastid genes are strikingly similar to their eubacterial (particularly cyanobacterial) counterparts in sequence, organization, and mode of expression, and such ...
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Regulation of ribosomal protein genes: An ordered anarchy
Wiley Interdisciplinary Reviews RNA, 2021Sherif Abou Elela, A G Foster
exaly