Results 21 to 30 of about 7,056 (183)

A Phylogeny of Bacterial RNA Nucleotidyltransferases: Bacillus halodurans Contains Two tRNA Nucleotidyltransferases [PDF]

open access: yesJournal of Bacteriology, 2005
ABSTRACT We have analyzed the distribution of RNA nucleotidyltransferases from the family that includes poly(A) polymerases (PAP) and tRNA nucleotidyltransferases (TNT) in 43 bacterial species. Genes of several bacterial species encode only one member of the nucleotidyltransferase superfamily (NTSF), and if that protein functions
Patricia, Bralley   +2 more
openaire   +2 more sources

Origin of the Genetic Code Is Found at the Transition between a Thioester World of Peptides and the Phosphoester World of Polynucleotides

open access: yesLife, 2019
The early metabolism arising in a Thioester world gave rise to amino acids and their simple peptides. The catalytic activity of these early simple peptides became instrumental in the transition from Thioester World to a Phosphate World.
Hyman Hartman, Temple F. Smith
doaj   +1 more source

TYMV RNA As a substrate of the tRNA nucleotidyltransferase [PDF]

open access: yesFEBS Letters, 1970
It has been recently shown that in the presence of partly purified enzyme preparations from Escherichia coli and ATP. lhe RNA (M.W. = 2 × 106) of Turnip Yellow Mosaic Virus (TYMV) reacts with valine forming an ester bond analogous to that existing in aminoacyltRNA: lhe valine estcrifies the., -terminal adenosine ofTYMV RNA II. 21.
Litvak, S., Carré, D.S., Chapeville, F.
openaire   +2 more sources

Identification and characterization of a novel aminoglycoside O-nucleotidyltransferase ANT(6)-If from Paenibacillus thiaminolyticus PATH554

open access: yesFrontiers in Microbiology, 2023
BackgroundPaenibacillus thiaminolyticus, a species of genus Paenibacillus of the family Paenibacillaceae, exists widely in environments and habitats in various plants and worms, and occasionally causes human infections.
Junwan Lu   +10 more
doaj   +1 more source

THIOL GROUPS IN DEOXYRIBONUCLEIC ACID NUCLEOTIDYLTRANSFERASE [PDF]

open access: yesBiochemical Journal, 1965
1. The inhibitory effects of iodoacetate, iodoacetamide, p-hydroxymercuribenzoate and sarkomycin were studied in a partially purified preparation of deoxyribonucleic acid nucleotidyltransferase from Landschutz ascites-tumour cells. All of these agents inhibited the activity of the enzyme, and it was shown that the inhibition exerted by the last three ...
H M, KEIR, J B, SHEPHERD
openaire   +2 more sources

Purification and Characterization of a Mutant tRNA Nucleotidyltransferase [PDF]

open access: yesEuropean Journal of Biochemistry, 1980
tRNA nucleotidyltransferase has been extensively purified from a mutant strain of Escherichia coli which displays greatly decreased AMP incorporation, but normal CMP incorporation. The defect in AMP incorporation is retained throughout the purification of the mutant protein. The mutant protein behaves identically to the wild‐type protein with regard to
R G, McGann, M P, Deutscher
openaire   +2 more sources

Analysis of Unusual Eukaryotic tRNA Nucleotidyltransferases and Establishment of a High-Throughput Sequencing Method for Mature tRNAs

open access: yes, 2020
Transfer RNA nucleotidyltransferases (CCA-adding enzymes) are important enzymes, which catalyze the attachment of a CCA triplet to the 3‘ end of tRNAs, an essential requirement for subsequent aminoacylation.
Erber, Lieselotte
core   +1 more source

The influence of spermidine on the reaction of RNA nucleotidyltransferase

open access: yesBiochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1968
Abstract 1. 1. RNA synthesis, catalyzed by RNA nucleotidyltransferase ( Escherichia coli B) and directed by native, double-stranded DNA, is significantly increased by spermidine. 2. 2. By use of doubly labeled ATP ([8- 14 C]- and [γ- 32 P]-) and by zone centrifugation, we could show that, in the presence of spermidine, more RNA chains are ...
Petersen, E. E., Kroeger, H., Hagen, U.
openaire   +5 more sources

Expanding the Substrate Scope of a Bacterial Nucleotidyltransferase via Allosteric Mutations

open access: yes, 2022
Bacterial glycoconjugates, such as cell surface polysaccharides and glycoproteins, play important roles in cellular interactions and survival. Enzymes called nucleotidyltransferases use sugar-1-phosphates and nucleoside triphosphates (NTPs) to produce ...
Meng Zheng (1747132)   +2 more
core   +1 more source

Structural and Molecular Basis for Resistance to Aminoglycoside Antibiotics by the Adenylyltransferase ANT(2″)-Ia

open access: yesmBio, 2015
The aminoglycosides are highly effective broad-spectrum antimicrobial agents. However, their efficacy is diminished due to enzyme-mediated covalent modification, which reduces affinity of the drug for the target ribosome.
Georgina Cox   +3 more
doaj   +1 more source

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