Results 131 to 140 of about 57,780 (287)

Functional determinants of gate-DNA selection and cleavage by bacterial type II topoisomerases

Nucleic Acids Research, 2013
Antibacterial fluoroquinolones trap a cleavage complex of gyrase and topoisomerase (topo) IV inducing site-specific DNA breakage within a bent DNA gate engaged in DNA transport.
E. Arnoldi, X. Pan, L. M. Fisher
semanticscholar   +1 more source

Proteostasis of organelles in aging and disease

The FEBS Journal, EarlyView.
Cells rely on regulated proteostasis mechanisms to keep their internal compartments functioning properly. When these mechanisms fail, damaged proteins accumulate, disrupting organelles, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi, and lysosomes, as well as membraneless organelles, such as stress granules, processing bodies, the ...
Yara Nabawi, Cansu Doğan, Dunja Petrović, Gülce Perçin, Seda Koyuncu, David Vilchez   +5 more
wiley   +1 more source

A RADAR-Based Assay to Isolate Covalent DNA Complexes in Bacteria

Antibiotics, 2019
Quinolone antibacterials target the type II topoisomerases gyrase and topoisomerase IV and kill bacterial cells by converting these essential enzymes into cellular poisons. Although much is known regarding the interactions between these drugs and enzymes
Katie J. Aldred, Adeline Payne, Olivia Voegerl   +2 more
doaj   +1 more source

Regulation of R-Loop Dynamics by Proteins and Long Noncoding RNAs: An Emerging Paradigm for Cancer Treatment. [PDF]

Cancer Sci
R‐loops are three‐stranded nucleic acid structures whose dysregulation leads to genomic instability and cancer progression. This review summarizes the protein and lncRNA machineries that regulate R‐loop dynamics and discusses the therapeutic potential of targeting these pathways in cancer.
Suzuki MM, Shinjo K, Nishimura T, Kondo Y.   +3 more
europepmc   +2 more sources

Common Hematologic Emergencies—Acute Promyelocytic Leukemia and Microangiopathic Hemolytic Anemias—A Pivotal Role of Clinical Laboratory

International Journal of Laboratory Hematology, EarlyView.
ABSTRACT Hematologic emergencies are urgent health conditions which result in significant mortality and morbidity unless timely therapeutic measures are taken. Therapeutic success depends on their timely and accurate recognition by hematology laboratory services.
Ganna Shestakova, Nicolas Ulrich Edgar, Anton V. Rets   +2 more
wiley   +1 more source

The ancestral role of ATP hydrolysis in type II topoisomerases: prevention of DNA double-strand breaks

Nucleic Acids Research, 2011
Type II DNA topoisomerases (topos) catalyse changes in DNA topology by passing one double-stranded DNA segment through another. This reaction is essential to processes such as replication and transcription, but carries with it the inherent danger of ...
A. Bates, J. Berger, A. Maxwell
semanticscholar   +1 more source

Long‐term remission of type B insulin resistance syndrome with immunotherapy: A case report

Journal of Diabetes Investigation, EarlyView.
ABSTRACT We report long‐term remission in a patient with type B insulin resistance achieved with a combination of immunotherapies. A 55‐year‐old Japanese man presented with nocturnal hypoglycemia and cytopenia. He also had postprandial hyperglycemia due to severe insulin resistance, which was difficult to manage using high‐dose insulin and recombinant ...
Erika Egawa, Rei Karasawa, Yuka Kageyama, Kazuhiko Takaya   +3 more
wiley   +1 more source

Topoisomerase IIb binding delineates localized mutational processes and driver mutations in cancer genomes

Nature Communications
Type-II topoisomerases resolve topological stress in DNA through double-strand breaks. While topoisomerases are chemotherapy targets linked to therapy-related genotoxicity, TOP2B is uniquely positioned to influence mutagenesis through its activity in non-
Liis Uusküla-Reimand, Christian A. Lee, Robin H. Oh, Zoe P. Klein, Nina Adler, Sana Akhtar Alvi, Ellen Langille, Elisa Pasini, Kevin C. L. Cheng, Evgenija Serafimova, Diala Abd-Rabbo, Huayun Hou, Ricky Tsai, Mamatha Bhat, Daniel Schramek, Michael D. Wilson, Jüri Reimand   +16 more
doaj   +1 more source

A homogeneous type II DNA topoisomerase from HeLa cell nuclei.

Journal of Biological Chemistry, 1981
Using kinetoplast DNA networks as a substrate in a decatenation assay, we have purified to apparent homogeneity a type II DNA topoisomerase from HeLa cell nuclei. The most pure preparations contain a single polypeptide of 172,000 daltons as determined by sodium dodecyl sulfate-gel electrophoresis.
K G, Miller, L F, Liu, P T, Englund
openaire   +2 more sources

Bacillus subtilis RNase HII Is Inefficient at Processing Guanosine Monophosphate and Damaged Ribonucleotides

Molecular Microbiology, EarlyView.
Bacillus subtilis RNase HII corrects ribonucleotide errors and mismatched ribonucleotides, but not damaged ribonucleotides. Mismatched ribonucleotides would also serve as substrates for mismatch repair while damaged ribonucleotides would be addressed through base excision repair.
Julianna R. Cresti, Lyle A. Simmons
wiley   +1 more source