Literature DB >> 2336388

Excision of cytosine hydrates from Z-DNA.

N J Duker1, K M Weems.   

Abstract

Ultraviolet irradiation of DNA produces cytosine hydrate, released as a free base by E. coli endonuclease III. Cytosine hydrate excision was investigated by assaying photoproduct release from cytosine-radiolabeled, irradiated poly(dG-dC):poly(dG-dC). Conformational shifts between B-DNA and Z-DNA were affected by heating the polymer in either nickel chloride or cobaltous chloride, and were determined by circular dichroism. Rates of enzymic cytosine hydrate release did not differ between the different substrate conformations. Irradiation of left-handed poly(dG-dC):poly(dG-dC) resulted in cytosine hydrate formation. Therefore, neither formation nor enzymic excision of ultraviolet-induced cytosine hydrates are substantially affected by these DNA conformational states.

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Year:  1990        PMID： 2336388      PMCID： PMC330675          DOI： 10.1093/nar/18.8.2007

Source DB:  PubMed          Journal:  Nucleic Acids Res        ISSN： 0305-1048            Impact factor:   16.971


  20 in total

1.  Different ultraviolet DNA endonuclease activity in human cells.

Authors:  N J Duker; G W Teebor
Journal:  Nature       Date:  1975-05-01       Impact factor: 49.962

2.  Mechanism of action of a mammalian DNA repair endonuclease.

Authors:  P W Doetsch; D E Helland; W A Haseltine
Journal:  Biochemistry       Date:  1986-04-22       Impact factor: 3.162

3.  Alterations in the levels of deoxyuridine triphosphatase, uracil-DNA glycosylase and AP endonuclease during the cell cycle.

Authors:  N J Duker; C L Grant
Journal:  Exp Cell Res       Date:  1980-02       Impact factor: 3.905

4.  UV-induced pyrimidine hydrates in DNA are repaired by bacterial and mammalian DNA glycosylase activities.

Authors:  R J Boorstein; T P Hilbert; J Cadet; R P Cunningham; G W Teebor
Journal:  Biochemistry       Date:  1989-07-25       Impact factor: 3.162

5.  The Escherichia coli O6-methylguanine-DNA methyltransferase does not repair promutagenic O6-methylguanine residues when present in Z-DNA.

Authors:  S Boiteux; R Costa de Oliveira; J Laval
Journal:  J Biol Chem       Date:  1985-07-25       Impact factor: 5.157

6.  Ring-opened alkylated guanine is not repaired in Z-DNA.

Authors:  C Lagravère; B Malfoy; M Leng; J Laval
Journal:  Nature       Date:  1984 Aug 30-Sep 5       Impact factor: 49.962

7.  Rates of heat-induced DNA purine alterations in synthetic polydeoxyribonucleotides.

Authors:  N J Duker; T L Chao; E M Resnick
Journal:  Chem Biol Interact       Date:  1986-06       Impact factor: 5.192

8.  Repair of O6-methylguanine, by mammalian cell extracts, in alkylated DNA and poly(dG-m5dC).(poly dG-m5dC) in B and Z forms.

Authors:  S Boiteux; F Laval
Journal:  Carcinogenesis       Date:  1985-05       Impact factor: 4.944

9.  Induction of the Z conformation in poly(dG-dC).poly(dG-dC) by binding of N-2-acetylaminofluorene to guanine residues.

Authors:  R M Santella; D Grunberger; I B Weinstein; A Rich
Journal:  Proc Natl Acad Sci U S A       Date:  1981-03       Impact factor: 11.205

10.  Mn2+ and other transition metals at low concentration induce the right-to-left helical transformation of poly[d(G-C)].

Authors:  J H van de Sande; L P McIntosh; T M Jovin
Journal:  EMBO J       Date:  1982       Impact factor: 11.598
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