Topoisomerase VI senses and exploits both DNA crossings and bends to facilitate strand passage
eLife, 2018 Type II topoisomerases manage DNA supercoiling and aid chromosome segregation using a complex, ATP-dependent duplex strand passage mechanism. Type IIB topoisomerases and their homologs support both archaeal/plant viability and meiotic recombination. Topo
Timothy J Wendorff, James M Berger
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Electrostatics of DNA–DNA juxtapositions: consequences for type II topoisomerase function [PDF]
Journal of Physics: Condensed Matter, 2006 Type II topoisomerases resolve problematic DNA topologies such as knots, catenanes, and supercoils that arise as a consequence of DNA replication and recombination. Failure to remove problematic DNA topologies prohibits cell division and can result in cell death or genetic mutation. Such catastrophic consequences make topoisomerases an effective target
Graham L, Randall +3 more
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Clerocidin selectively modifies the gyrase-DNA gate to induce irreversible and reversible DNA damage [PDF]
, 2008 Clerocidin (CL), a microbial diterpenoid, reacts with DNA via its epoxide group and stimulates DNA cleavage by type II DNA topoisomerases. The molecular basis of CL action is poorly understood.
Binaschi +34 more
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DNA topoisomerase inhibitors: biflavonoids from Ouratea species
Brazilian Journal of Medical and Biological Research, 2002 Topoisomerase inhibitors are agents with anticancer activity. 7"-O-Methyl-agathisflavone (I) and amentoflavone (II) are biflavonoids and were isolated from the Brazilian plants Ouratea hexasperma and O. semiserrata, respectively.
N.F. Grynberg +6 more
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Scientific Reports, 2014 DNA topoisomerases control the topology of DNA. Type II topoisomerases exhibit topology simplification, whereby products of their reactions are simplified beyond that expected based on thermodynamic equilibrium.
N. Thomson +5 more
semanticscholar +1 more source
Atomic force microscopy shows that vaccinia topoisomerase IB generates filaments on DNA in a cooperative fashion [PDF]
, 2005 Type IB DNA topoisomerases cleave and rejoin one strand of the DNA duplex, allowing for the removal of supercoils generated during replication and transcription.
Dekker, Cees +5 more
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Methanosarcina acetivorans C2A topoisomerase IIIα, an archaeal enzyme with promiscuity in divalent cation dependence. [PDF]
PLoS ONE, 2011 Topoisomerases play a fundamental role in genome stability, DNA replication and repair. As a result, topoisomerases have served as therapeutic targets of interest in Eukarya and Bacteria, two of the three domains of life.
Raymond Morales +3 more
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DNA Cleavage Mediated by Bacterial Type II Topoisomerases. [PDF]
Methods Mol BiolThe maintenance of DNA topology is critical for cellular processes. Topoisomerases are a class of enzymes found in eukaryotic and prokaryotic organisms that modulate the topology of DNA during replication and transcription. Bacterial type II topoisomerases, DNA gyrase and topoisomerase IV, are essential for bacterial cell survival.
Mann CA, Osheroff N.
europepmc +3 more sources
Machines on Genes: Enzymes that Make, Break and Move DNA and RNA [PDF]
, 2010 As the vital information repositories of the cell, the nucleic acids DNA and RNA pose many challenges as enzyme substrates. To produce, maintain and repair DNA and RNA, and to extract the genetic information that they encode, a battery of remarkable ...
Bates +13 more
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Crystallization and preliminary crystallographic analysis of the DNA gyrase B protein from B-stearothermophilus [PDF]
, 1996 DNA gyrase B (GyrB) from B. stearothermophilus has been crystallized in the presence of the non-hydrolyzable ATP analogue, 5'-adenylpl-beta-gamma-imidodiphosphate (ADPNP), by the dialysis method.
Brannigan, J A +4 more
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