Cited by 48DNA Repair MechanismsDNA and Nucleic Acid ChemistryEnzyme Structure and Function

A nucleobase lesion remodels the interaction of its normal neighbor in a DNA glycosylase complex

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Banerjee, Anirban, Verdine, Gregory L.·2006·Proceedings of the National Academy of Sciences

Abstract

How DNA glycosylases search through millions of base pairs and discriminate between rare sites of damage and otherwise undamaged bases is poorly understood. Even less understood are the details of the structural states arising from DNA glycosylases interacting with undamaged DNA. Recognizing the mutagenic lesion 7,8-dihydro-8-oxoguanine (8-oxoguanine, oxoG) represents an especially formidable challenge, because this oxidized nucleobase differs by only two atoms from its normal counterpart, guanine (G), and buried in the structure of naked B-form DNA, oxoG and G are practically indistinguishable from each other. We have used disulfide cross-linking technology to capture a human oxoG repair protein, 8-oxoguanine DNA glycosylase I (hOGG1) sampling an undamaged G:C base pair located adjacent to an oxoG:C base pair in DNA. The x-ray structure of the trapped complex reveals that the presence of the 8-oxoG drastically changes the local conformation of the extruded G. The extruded but intrahelical state of the G in this structure offers a view of an early intermediate in the base-extrusion pathway.

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  1. [24]MacMillan AM, Verdine GL. Tetrahedron. 1991;47:2603–2616. [Google Scholar]
  2. [29]Carson MJ. J Appl Crystallogr. 1991;24:379–384. [Google Scholar]
  3. [30]Laskowski RJ, Macarthur MW, Moss DS, Thorton JM. J Appl Crystallogr. 1993;26:283–290. [Google Scholar]

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Authors
Banerjee, A., & Verdine, G. L.
Affiliations
Harvard University (US)
Venue
Proceedings of the National Academy of Sciences
Published
2006-10-10
Volume
103
Issue
41
Pages
15020-15025
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2069230847
Cited by
48
References
31
Citations by year
2024: 1 · 2023: 1 · 2022: 1 · 2021: 2 · 2020: 3 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 3 · 2015: 1 · 2013: 1 · 2012: 8
FWCI
1.77
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
Funders
  • National Cancer Institute (R01CA100742)
  • National Institute of General Medical Sciences (R01GM044853, GM 044853)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
8-oxoguanine, OGG1, DNA glycosylase, GC base pairs, disulfide cross-linking, DNA repair, DNA conformation
MeSH terms
Binding Sites, DNA Damage, Guanine, Humans, Models, Chemical, Models, Molecular, Protein Conformation, Crystallography, X-Ray, DNA Glycosylases

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