scholarly journals On the Formation and Properties of Interstrand DNA–DNA Cross-Links Forged by Reaction of an Abasic Site with the Opposing Guanine Residue of 5′-CAp Sequences in Duplex DNA

2013 ◽  
Vol 135 (3) ◽  
pp. 1015-1025 ◽  
Author(s):  
Kevin M. Johnson ◽  
Nathan E. Price ◽  
Jin Wang ◽  
Mostafa I. Fekry ◽  
Sanjay Dutta ◽  
...  
Keyword(s):  
Duplex Dna ◽  
Abasic Site ◽  
Guanine Residue ◽  
Cross Links

Solution Structure of a Duplex DNA with an Abasic Site in a dA Tract†

Biochemistry ◽  
1997 ◽  
Vol 36 (39) ◽  
pp. 11629-11639 ◽  
Author(s):  
Ke Yu Wang ◽  
Sharon A. Parker ◽  
Igor Goljer ◽  
Philip H. Bolton
Keyword(s):  
Solution Structure ◽  
Duplex Dna ◽  
Abasic Site

scholarly journals 4-vinyl-substituted pyrimidine nucleosides exhibit the efficient and selective formation of interstrand cross-links with RNA and duplex DNA

2013 ◽  
Vol 41 (13) ◽  
pp. 6774-6781 ◽  
Author(s):  
Atsushi Nishimoto ◽  
Daichi Jitsuzaki ◽  
Kazumitsu Onizuka ◽  
Yosuke Taniguchi ◽  
Fumi Nagatsugi ◽  
...  
Keyword(s):  
Duplex Dna ◽  
Pyrimidine Nucleosides ◽  
Interstrand Cross Links ◽  
Cross Links ◽  
Selective Formation

Chemical and biochemical properties of abasic site adducts and 6-thioguanine DNA cross-links in DNA

2017 ◽  
Author(s):  
◽  
Calvin D. Lewis
Keyword(s):  
Excision Repair ◽  
Biochemical Properties ◽  
Macromolecular Complex ◽  
Abasic Site ◽  
Cross Link ◽  
Dna Lesion ◽  
Phosphate Backbone ◽  
Cross Links ◽  
Ap Sites ◽  
Cellular Dna

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] DNA is a macromolecular complex, composed of the nucleotides adenine, thymine, guanine and cytosine interconnected by a phosphate backbone, that contains the genetic code for living organisms and viruses. Spontaneous and enzymatic hydrolysis of the glycosidic bonds that hold the coding nucleobases to the 2-deoxyribose-phosphate backbone of DNA results in the production of abasic (Ap) sites. These lesions are abundant in cellular DNA, and cellular Ap-containing DNA is damaging and may lead to cellular destruction if left unrepaired. Thus, efficient cellular DNA repair mechanisms that repair Ap sites have evolved in DNA containing organisms. The studies in this report examine the interaction between small molecules or naturally occurring DNA residues with Ap sites in duplex DNA. Experiments provide evidence that hydralazine binds to and forms a stable DNA lesion in single- and double-stranded DNA. Also, the hydralazine-DNA lesion is found to be a poor substrate for mammalian base excision repair enzymes such as Ap endonuclease and 8-oxoguanine DNA glycosylase. In addition, these studies provide preliminary evidence that hydralazine may potentiate the cytotoxicity of temozolomide in U87 cells. The investigation of the formation of cross-links between canonical DNA residues deoxyadenosine (dA) and deoxyguanosine (dG) with Ap sites is also explored. These experiments suggest that sequence effects contribute majorly to the cross-link yield in both dA- and dG-Ap site cross-links, especially when comparing central versus terminal cross-link locations. Here, this manuscript provides novel studies involving the interaction between DNA analog 6-thioguanine and opposing DNA bases in duplex oligonucleotide DNA.

scholarly journals Chemical and structural characterization of interstrand cross-links formed between abasic sites and adenine residues in duplex DNA

2015 ◽  
Vol 43 (7) ◽  
pp. 3434-3441 ◽  
Author(s):  
Nathan E. Price ◽  
Michael J. Catalano ◽  
Shuo Liu ◽  
Yinsheng Wang ◽  
Kent S. Gates
Keyword(s):  
Structural Characterization ◽  
Duplex Dna ◽  
Abasic Sites ◽  
Interstrand Cross Links ◽  
Cross Links

Effects of the presence of an aldehydic abasic site on the thermal stability and rates of helix opening and closing of duplex DNA

Biochemistry ◽  
1992 ◽  
Vol 31 (46) ◽  
pp. 11614-11619 ◽  
Author(s):  
Igor Goljer ◽  
Jane M. Withka ◽  
Jung Yie Kao ◽  
Philip H. Bolton
Keyword(s):  
Thermal Stability ◽  
Duplex Dna ◽  
Abasic Site ◽  
Opening And Closing

scholarly journals Cho Endonuclease Functions during DNA Interstrand Cross-Link Repair in Escherichia coli

2016 ◽  
Vol 198 (22) ◽  
pp. 3099-3108 ◽  
Author(s):  
Anthonige Vidya Perera ◽  
James Brian Mendenhall ◽  
Charmain Tan Courcelle ◽  
Justin Courcelle
Keyword(s):  
Nucleotide Excision Repair ◽  
Excision Repair ◽  
Repair Process ◽  
Differential Sensitivity ◽  
Duplex Dna ◽  
Dna Lesion ◽  
Nucleotide Excision ◽  
Interstrand Cross Links ◽  
Cross Links ◽  
Complex Lesions

ABSTRACTDNA interstrand cross-links are complex lesions that covalently link both strands of the duplex DNA. Lesion removal is proposed to be initiated via the UvrABC nucleotide excision repair complex; however, less is known about the subsequent steps of this complex repair pathway. In this study, we characterized the contribution of nucleotide excision repair mutants to survival in the presence of psoralen-induced damage. Unexpectedly, we observed that the nucleotide excision repair mutants exhibit differential sensitivity to psoralen-induced damage, withuvrCmutants being less sensitive than eitheruvrAoruvrB. We show that Cho, an alternative endonuclease, acts with UvrAB and is responsible for the reduced hypersensitivity ofuvrCmutants. We find that Cho's contribution to survival correlates with the presence of DNA interstrand cross-links, rather than monoadducts, and operates at a step after, or independently from, the initial incision during the global repair of psoralen DNA adducts from the genome.IMPORTANCEDNA interstrand cross-links are complex lesions that covalently bind to both strands of the duplex DNA and whose mechanism of repair remains poorly understood. In this study, we show that Cho, an alternative endonuclease, acts with UvrAB and participates in the repair of DNA interstrand cross-links formed in the presence of photoactivated psoralens. Cho's contribution to survival correlates with the presence of DNA interstrand cross-links and operates at a step after, or independently from, the initial incision during the repair process.

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