Results 41 to 50 of about 9,967 (240)

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, M.G. Carvalho, J.R. Velandia, M.C. Oliveira, I.C. Moreira, R. Braz- Filho, A. Echevarria   +6 more
doaj   +1 more source

Mechanism of type II DNA topoisomerases: a tale of two gates [PDF]

Structure, 1994
DNA topoisomerases are fascinating enzymes involved in many cellular processes including replication, transcription, and genetic recombination. They are capable of catalyzing topological rearrangements of DNA such as relaxation of supercoiled DNA and catenation and decatenation of DNA rings [1xCozzarelli, N.R. and Wang, J.C. (eds). See all References[1]
C D, Lima, A, Mondragón
openaire   +2 more sources

Structure of the N-terminal gyrase B fragment in complex with ADP⋅Pi reveals rigid-body motion induced by ATP hydrolysis [PDF]

, 2014
Type II DNA topoisomerases are essential enzymes that catalyze topological rearrangement of double-stranded DNA using the free energy generated by ATP hydrolysis.
Stanger, Frédéric V., Frédéric V Stanger, Tilman Schirmer, Dehio, Christoph, Schirmer, Tilman, Christoph Dehio, Frédéric V. Stanger (585551), Frédéric V. Stanger, Tilman Schirmer (585552), Christoph Dehio (200951)   +9 more
core   +1 more source

Clerocidin interacts with the cleavage complex of Streptococcus pneumoniae topoisomerase IV to induce selective irreversible DNA damage [PDF]

, 2006
Clerocidin (CL), a diterpenoid natural product, alkylates DNA through its epoxide moiety and exhibits both anticancer and antibacterial activities. We have examined CLaction in the presence of topoisomerase IV from Streptococcus pneumoniae.
Fisher, LM, RICHTER, SARA, Giaretta, G, LEO, ELISABETTA, GIARETTA, GIULIA, Palumbo, M, Leo, E, FISHER L. M, Richter, SN, Gatto, B, GATTO, BARBARA, PALUMBO, MANLIO   +11 more
core   +1 more source

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, Palita Sriratana, Jing Zhang, Isaac K O Cann   +3 more
doaj   +1 more source

The impact of the human DNA topoisomerase II C-terminal domain on activity [PDF]

, 2008
Background Type II DNA topoisomerases (topos) are essential enzymes needed for the resolution of topological problems that occur during DNA metabolic processes.
West, K.L., Katherine L West, Meczes, E.L., Kathryn L Gilroy, Caroline A Austin, Austin Caroline A., Austin, C.A., Gilroy Kathryn L., Meczes Emma L., Gilroy, K.L., Emma L Meczes, West Katherine L.   +11 more
core   +1 more source

Topoisomerase IIα promotes activation of RNA polymerase I transcription by facilitating pre-initiation complex formation [PDF]

, 2013
Type II DNA topoisomerases catalyse DNA double-strand cleavage, passage and re-ligation to effect topological changes. There is considerable interest in elucidating topoisomerase II roles, particularly as these proteins are targets for anti-cancer drugs.
Porter, Andrew C. G., Panov, Konstantin I; id_orcid, Zomerdijk, Joost C.B.M., Russell, J., Miller, G. (Gail), Zomerdijk, Joost C B M, Porter, A.C., Porter, Andrew C G, Volkov, A., Panov, K.I., Panov, Konstantin I., Russell, J. (Jackie), Panova, T., Zomerdijk, J.C., Miller, Gail, Porter, Andrew C.G., Miller, G., Panova, Tatiana, Russell, Jackie, Ray, S., Ray, Swagat, Volkov, Arsen, Zomerdijk, Joost C. B. M.   +22 more
core   +1 more source

Binding of two DNA molecules by type II topoisomerases for decatenation [PDF]

Nucleic Acids Research, 2012
Topoisomerases (topos) maintain DNA topology and influence DNA transaction processes by catalysing relaxation, supercoiling and decatenation reactions. In the cellular milieu, division of labour between different topos ensures topological homeostasis and control of central processes.
Kumar, Rupesh, Riley, Jane E., Parry, Damian, Bates, Andrew D., Nagaraja, Valakunja   +4 more
openaire   +2 more sources

Structural insights into the gating of DNA passage by the topoisomerase II DNA-gate

Nature Communications, 2018
Type II DNA topoisomerases (Top2s) direct the passage of one DNA duplex through another, which is important for resolving DNA entanglements. Here the authors combine X-ray crystallography and MD simulations and present the structure of the human Top2 DNA-
Shin-Fu Chen, Nan-Lan Huang, Jung-Hsin Lin, Chyuan-Chuan Wu, Ying-Ren Wang, Yu-Jen Yu, Michael K. Gilson, Nei-Li Chan   +7 more
doaj   +1 more source

Arabidopsis thaliana GYRB3 does not encode a DNA gyrase subunit.

PLoS ONE, 2010
BackgroundDNA topoisomerases are enzymes that control the topology of DNA in all cells. DNA gyrase is unique among the topoisomerases in that it is the only enzyme that can actively supercoil DNA using the free energy of ATP hydrolysis.
Katherine M Evans-Roberts, Christian Breuer, Melisa K Wall, Keiko Sugimoto-Shirasu, Anthony Maxwell   +4 more
doaj   +1 more source