Results 31 to 40 of about 7,722 (193)

Primase-polymerases are a functionally diverse superfamily of replication and repair enzymes [PDF]

open access: yes, 2015
Until relatively recently, DNA primases were viewed simply as a class of proteins that synthesize short RNA primers requisite for the initiation of DNA replication.
Aidan J. Doherty   +17 more
core   +1 more source

Promiscuous splicing-derived hairpins are dominant substrates of tailing-mediated defense of miRNA biogenesis in mammals

open access: yesCell Reports, 2023
Summary: Canonical microRNA (miRNA) hairpins are processed by the RNase III enzymes Drosha and Dicer into ∼22 nt RNAs loaded into an Argonaute (Ago) effector.
Seungjae Lee   +10 more
doaj  

A new subclass of intrinsic aminoglycoside nucleotidyltransferases, ANT(3")-II, is horizontally transferred among Acinetobacter spp. by homologous recombination.

open access: yesPLoS Genetics, 2017
The emergence and spread of antibiotic resistance among Acinetobacter spp. have been investigated extensively. Most studies focused on the multiple antibiotic resistance genes located on plasmids or genomic resistance islands.
Gang Zhang   +7 more
doaj   +1 more source

Solution, solid-phase, and fluorous-phase synthesis of carbohydrates and production of carbohydrate microarrays [PDF]

open access: yes, 2006
This dissertation focuses on two specific aspects of the chemistry of carbohydrates. The first is the solid- and fluorous-phase synthesis of oligosaccharides and their use in forming microarrays.
Ko, Kwang-Seuk
core   +2 more sources

Amikacin: Uses, Resistance, and Prospects for Inhibition

open access: yesMolecules, 2017
Aminoglycosides are a group of antibiotics used since the 1940s to primarily treat a broad spectrum of bacterial infections. The primary resistance mechanism against these antibiotics is enzymatic modification by aminoglycoside-modifying enzymes that are
Maria S. Ramirez, Marcelo E. Tolmasky
doaj   +1 more source

Unusual evolution of a catalytic core element in CCA-adding enzymes [PDF]

open access: yes, 2010
CCA-adding enzymes are polymerases existing in two distinct enzyme classes that both synthesize the C-C-A triplet at tRNA 3′-ends. Class II enzymes (found in bacteria and eukaryotes) carry a flexible loop in their catalytic core required for switching ...
Betat, Heike   +6 more
core   +2 more sources

Discovery of Three Toxic Proteins of Klebsiella Phage fHe-Kpn01 [PDF]

open access: yes, 2020
The lytic phage, fHe-Kpn01 was isolated from sewage water using an extended-spectrum beta-lactamase-producing strain of Klebsiella pneumoniae as a host. The genome is 43,329 bp in size and contains direct terminal repeats of 222 bp.
Pajunen, Maria I.   +4 more
core   +3 more sources

Bacteriophage antidefense genes that neutralize TIR and STING immune responses

open access: yesCell Reports, 2023
Summary: Programmed cell suicide of infected bacteria, known as abortive infection (Abi), serves as an immune defense strategy to prevent the propagation of bacteriophage viruses.
Peiyin Ho   +5 more
doaj  

Biophysical and enzymatic properties of aminoglycoside adenylyltransferase AadA6 from Pseudomonas aeruginosa [PDF]

open access: yes, 2015
The gene coding for the aminoglycoside adenylyltransferase (aadA6) from a clinical isolate of Pseudomonas aeruginosa was cloned and expressed in Escherichia coli strain BL21(DE3)pLysS.
Akdemir, G.   +9 more
core   +2 more sources

Emergence of five kinds of aminoglycoside-modifying enzyme genes simultaneously in a strain of multidrugresistant Escherichia coli in China [PDF]

open access: yes, 2012
A strain of Escherichia coli was positive for 5 aminoglycoside modifying enzyme genes (aac(3)-I, aac(6′)-Ib-cr, ant(3′)-1, aadA5, and aph(3′)-I) in PCR assays.
Wang-Sheng, Z.   +2 more
core   +1 more source

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