Results 191 to 200 of about 246,508 (214)
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Ribosomal proteins and the conformation of ribosomal ribonucleic acid
Journal of Molecular Biology, 1971Abstract Heat-denatured 16 s ribosomal RNA from Escherichia coli will combine with the total 30 s ribosomal proteins to form partially active 30 s ribosomes. The reconstitution process results in a change in the structure of the RNA, which can be demonstrated by chromatography on columns of methylated albuminkieselguhr.
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Journal of Molecular Biology, 1973
Abstract Isolation of ribosomal precursors from Escherichia coli K12 is described. The RNA and protein content of the precursor particles was determined. One physiologically stable precursor was found for the 30 S subunit. The assembly scheme is as follows: p16 S RNA + 9 proteins → p30 S (“21 S” precursor) p30 S + 12 proteins → 30 S subunit where ...
Heide E. Homann +2 more
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Abstract Isolation of ribosomal precursors from Escherichia coli K12 is described. The RNA and protein content of the precursor particles was determined. One physiologically stable precursor was found for the 30 S subunit. The assembly scheme is as follows: p16 S RNA + 9 proteins → p30 S (“21 S” precursor) p30 S + 12 proteins → 30 S subunit where ...
Heide E. Homann +2 more
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Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression, 1987
The relative accessibility of rat liver ribosomal proteins to reductive methylation was examined using membrane-bound and free ribosomes. Comparisons indicated that 12-13 large ribosomal proteins are masked by ribosomal association with membranes. These consisted of L8, L10, L17, L26-28, L31 and L36, and probably also include L4, L5, L7 and L29.
Robert Kisilevsky, J. Gore
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The relative accessibility of rat liver ribosomal proteins to reductive methylation was examined using membrane-bound and free ribosomes. Comparisons indicated that 12-13 large ribosomal proteins are masked by ribosomal association with membranes. These consisted of L8, L10, L17, L26-28, L31 and L36, and probably also include L4, L5, L7 and L29.
Robert Kisilevsky, J. Gore
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Protein Kinase Associated with Ribosomes Phosphorylates Ribosomal Proteins ofStreptomyces collinus
Biochemical and Biophysical Research Communications, 1997Protein kinase activity associated with ribosomes of a kirromycin-producing strain of Streptomyces collinus was detected. The enzyme utilizes [gamma-32P]ATP to phosphorylate proteins, yielding acid-stable phosphoamino acids. Two-dimensional electrophoresis of proteins from a crude ribosomal fraction revealed 17 phosphoproteins.
Ivan Janda, Karel Mikulík
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Crystallization of Ribosomes, Ribosomal Subunits, and Individual Ribosomal Proteins
1991There is interest in the three-dimensional structure of the ribosome since it is a unique multicomponent biological system responsible for the biosynthesis of protein in the cell. The exceedingly complex structure of ribosomes (for example, the Escherichia coli ribosome, the molecular weight of which is 2.15•106 Da, consists of three types of RNA and ...
B. K. Vainshtein, S. D. Trakhanov
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Ribosomal proteins. XXV. Immunological studies on Escherichia coli ribosomal proteins
Journal of Molecular Biology, 1971Abstract Antisera specific for each of the twenty-one 30 s proteins and for 24 50 s ribosomal proteins of Escherichia coli were prepared and used to investigate whether there are any extensive sequence homologies between the different proteins. No immunological cross-reactions were detected between any of the proteins, except L7 and L12 which gave
Georg Stöffler, H.G. Wittmann
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1974
Publisher Summary The proteins of eukaryotic ribosomes are phosphorylated in vivo and in vitro . In the latter case the reaction is catalyzed by protein kinases present in the cytosol or associated with ribosomes. Two such enzymes, both stimulated by cyclic adenosine 3', 5’-monophosphate (cyclic AMP), can be isolated from rat liver cytosol; the ...
Ira G. Wool, Charles Eil
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Publisher Summary The proteins of eukaryotic ribosomes are phosphorylated in vivo and in vitro . In the latter case the reaction is catalyzed by protein kinases present in the cytosol or associated with ribosomes. Two such enzymes, both stimulated by cyclic adenosine 3', 5’-monophosphate (cyclic AMP), can be isolated from rat liver cytosol; the ...
Ira G. Wool, Charles Eil
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Ribosomal Proteins and Their Structural Transitions on and off the Ribosome
2014This chapter briefly reviews the structural data available, identifies similarities and differences, and illustrates some difficulties in using the structures of isolated components for insertion into the structures of whole ribosomes or subunits determined at lower resolution.
Anders Liljas +7 more
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Extraribosomal functions of ribosomal proteins
Trends in Biochemical Sciences, 1996The discovery of DNA-binding motifs in ribosomal proteins has led to the conjecture that the transition of the ribosome from an RNA to an RNP machine occurred by adding pre-existing proteins. Supportive, but circumstantial, evidence for the hypothesis is adduced from the finding that many ribosomal proteins have a second function apart from the ...
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, 2014