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Plant DNA Topoisomerases: Structure, Function, and Cellular Roles in Plant Development
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Regulation of the topological state of DNA is critical for cellular viability. DNA topoisomerases alter DNA topology and participate in nearly all events related to DNA metabolism such as replication, transcription, recombination, and chromosome segregation. Despite significant progress in our un
derstanding of the structure, mechanism, and the role of topoisomerases in diverse cellular processes in bacteria, yeast, and animal systems, the roles of plant topoisomerases are poorly understood. In recent years expression studies, characterization of recombinant topoisomerases, and gene knockout ...
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Simulations of Action of DNA Topoisomerases to Investigate Boundaries and Shapes of Spaces of Knots
; ...mechanisms of action of various DNA topoisomerases. INTRODUCTION A statistical ensemble...molecules specific enzymes called topoisomerases allow intersegmental passages and...1985). Actually, only a subclass of topoisomerases, belonging to the class IA, can bring...
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Inhibitory Action of Conjugated C^sub 18^-Fatty Acids on DNA Polymerases and DNA Topoisomerases
; ...mammalian DNA polymerases and DNA topoisomerases, but their saturated forms could not...mammalian DNA polymerases and DNA topoisomerases as compared with normal unsaturated...active site of both DNA polymerases and topoisomerases must have had a pocket to join α...
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The Absence of Top3 Reveals an Interaction Between the Sgs1 and Pif1 DNA Helicases in Saccharomyces cerevisiae
; ABSTRACT RecQ DNA helicases and Topo III topoisomerases have conserved genetic, physical...in top3 mutants. DNA helicases and topoisomerases represent two classes of enzymes that...families, RecQ DNA helicases and DNA topoisomerases, specifically Topoisomerase III-like...
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Overview of the fluoroquinolones focus on moxifloxacin
; ...include the identification of the topoisomerases, which are required for bacterial...complete. Quinolones bind to these 2 topoisomerases and effectively inhibit their normal...Quinolone inhibition of bacterial topoisomerases is very rapid, which explains the...
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Hitting enzymes to kill cancer cells.
; ...fine-tuned drugs that attack the inner workings of cancer cells. Among the latest of these efforts is the inhibition of DNA topoisomerases -- enzymes needed to alter DNA's structure before synthesis of RNA and new DNA can occur. Scientists at the University of...
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Topoisomerase research of kinetoplastid parasite Leishmania, with special reference to development of therapeutics
; ...improved anti-parasitic therapy. DNA topoisomerases play a key role in cellular processes...summarizes the biology of kinetoplastid topoisomerases, which are the key molecular targets...In search for such strategies DNA topoisomerases of Leishmania offer most attractive...
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Overview of the fluoroquinolones: Focus on moxifloxacin
; ...include the identification of the topoisomerases, which are required for bacterial...complete. Quinolones bind to these 2 topoisomerases and effectively inhibit their normal...Quinolone inhibition of bacterial topoisomerases is very rapid, which explains the...
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A Talk on the Motor Side
; ...vesicles along the cytoskeleton; enzymes involved in DNA strand separation and replication, such as helicases, gyrases, and topoisomerases; and ATPases that move ions and large organic molecules across membrances are all motor proteins. Their genes have the same...
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Pea DNA topoisomerase I is phosphorylated and stimulated by casein kinase 2 and protein kinase C
; ...assembly, and chromosome segregation. DNA topoisomerases are a class of enzymes that catalyze...are classified as type I or type II topoisomerases. The type I enzymes are usually monomeric...see Wang, 1996). Eukaryotic type I topoisomerases do not require ATP, metal cofactors...
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Imaging an enzyme that shapes DNA. (Brief Article)
; ...callers in this nuclear dance hall are en- zymes called topoisomerases. They guide DNA into coils, then help this doublestranded...to study this fragment after realizing it was common to topoisomerases of several organisms. They describe their effort in the...
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