Impact of cationic surfactant-induced DNA compaction on the characteristics of a minor groove bound flavonol

Soft Matter ◽  
2022 ◽  
Author(s):  
Dipanjan Halder ◽  
Pradipta Purkayastha

3-Hydroxyflavone (3-HF), which binds to the minor groove of DNA, is a strong antioxidant and hence a potent therapeutic and diagnostic agent. A special photo-property, called excited state intramolecular proton...

2002 ◽  
Vol 124 (31) ◽  
pp. 9062-9063 ◽  
Author(s):  
Brian C. Bales ◽  
Marguerite Pitié ◽  
Bernard Meunier ◽  
Marc M. Greenberg

2007 ◽  
Vol 119 (36) ◽  
pp. 7010-7014 ◽  
Author(s):  
Olalla Vázquez ◽  
M. Eugenio Vázquez ◽  
Juan B. Blanco ◽  
Luis Castedo ◽  
José L. Mascareñas

Author(s):  
Paola Monti ◽  
Giorgia Foggetti ◽  
Paola Menichini ◽  
Alberto Inga ◽  
Barry Gold ◽  
...  

2005 ◽  
Vol 25 (19) ◽  
pp. 8748-8754 ◽  
Author(s):  
William T. Wolfle ◽  
Robert E. Johnson ◽  
Irina G. Minko ◽  
R. Stephen Lloyd ◽  
Satya Prakash ◽  
...  

ABSTRACT Acrolein, an α,β-unsaturated aldehyde, is generated in vivo as the end product of lipid peroxidation and from oxidation of polyamines. The reaction of acrolein with the N 2 group of guanine in DNA leads to the formation of a cyclic adduct, γ-hydroxy-1,N 2-propano-2′-deoxyguanosine (γ-HOPdG). Previously, we have shown that proficient replication through the γ-HOPdG adduct can be mediated by the sequential action of human DNA polymerases (Pols) ι and κ, in which Polι incorporates either pyrimidine opposite γ-HOPdG, but Polκ extends only from the cytosine. Since γ-HOPdG can adopt either a ring-closed cyclic form or a ring-opened form in DNA, to better understand the mechanisms that Pols ι and κ employ to promote replication through this lesion, we have examined the ability of these polymerases to replicate through the structural analogs of γ-HOPdG that are permanently either ring closed or ring opened. Our studies with these model adducts show that whereas the ring-opened form of γ-HOPdG is not inhibitory to synthesis by human Pols η, ι, or κ, only Polι is able to incorporate nucleotides opposite the ring-closed form, which is known to adopt a syn conformation in DNA. From these studies, we infer that (i) Pols η, ι, and κ have the ability to proficiently replicate through minor-groove DNA lesions that do not perturb the Watson-Crick hydrogen bonding of the template base with the incoming nucleotide, and (ii) Polι can accommodate a minor-groove-adducted template purine which adopts a syn conformation in DNA and forms a Hoogsteen base pair with the incoming nucleotide.


2004 ◽  
Vol 42 (1) ◽  
pp. 179-185 ◽  
Author(s):  
W. Hurtle ◽  
E. Bode ◽  
D. A. Kulesh ◽  
R. S. Kaplan ◽  
J. Garrison ◽  
...  

2010 ◽  
Vol 48 (12) ◽  
pp. 4487-4494 ◽  
Author(s):  
Shuhei Hige ◽  
Yoichi Yamamoto ◽  
Shigeru Yoshida ◽  
Tomoe Kobayashi ◽  
Hiromasa Horimoto ◽  
...  

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